Usenet 1993 July/InfoMagic USENET CD-ROM July 1993.ISO/sources/unix/volume21/berkeley_yacc/part04

Internet Message Format | 1990-04-05 | 57.0 KB

Subject:  v21i081:  Public domain Berkeley YACC, Part04/05
Newsgroups: comp.sources.unix
Approved: [e-mail]
X-Checksum-Snefru: 6aa3eecf 099d47f4 b3954733 4f38ac5a

Submitted-by: Robert Corbett <[e-mail]>
Posting-number: Volume 21, Issue 81
Archive-name: berkeley_yacc/part04

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#        "End of archive 4 (of 5)."
# Contents:  reader.c test/ftp.y
# Wrapped by [e-mail] on Mon Apr  2 11:43:44 1990
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'reader.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'reader.c'\"
else
echo shar: Extracting \"'reader.c'\" \(30471 characters\)
sed "s/^X//" >'reader.c' <<'END_OF_FILE'
X#include "defs.h"
X
X/*  The line size must be a positive integer.  One hundred was chosen    */
X/*  because few lines in Yacc input grammars exceed 100 characters.    */
X/*  Note that if a line exceeds LINESIZE characters, the line buffer    */
X/*  will be expanded to accomodate it.                    */
X
X#define LINESIZE 100
X
Xchar *cache;
Xint cinc, cache_size;
X
Xint ntags, tagmax;
Xchar **tag_table;
X
Xchar saw_eof, unionized;
Xchar *cptr, *line;
Xint linesize;
X
Xbucket *goal;
Xint prec;
Xint gensym;
Xchar last_was_action;
X
Xint maxitems;
Xbucket **pitem;
X
Xint maxrules;
Xbucket **plhs;
X
Xint name_pool_size;
Xchar *name_pool;
X
Xchar line_format[] = "#line %d \"%s\"\n";
X
X
Xcachec(c)
Xint c;
X{
X    assert(cinc >= 0);
X    if (cinc >= cache_size)
X    {
X    cache_size += 256;
X    cache = REALLOC(cache, cache_size);
X    if (cache == 0) no_space();
X    }
X    cache[cinc] = c;
X    ++cinc;
X}
X
X
Xget_line()
X{
X    register FILE *f = input_file;
X    register int c;
X    register int i;
X
X    if (saw_eof || (c = getc(f)) == EOF)
X    {
X    if (line) { FREE(line); line = 0; }
X    cptr = 0;
X    saw_eof = 1;
X    return;
X    }
X
X    if (line == 0 || linesize != (LINESIZE + 1))
X    {
X    if (line) FREE(line);
X    linesize = LINESIZE + 1;
X    line = MALLOC(linesize);
X    if (line == 0) no_space();
X    }
X
X    i = 0;
X    ++lineno;
X    for (;;)
X    {
X    line[i]  =  c;
X    if (c == '\n') { cptr = line; return; }
X    if (++i >= linesize)
X    {
X        linesize += LINESIZE;
X        line = REALLOC(line, linesize);
X        if (line ==  0) no_space();
X    }
X    c = getc(f);
X    if (c ==  EOF)
X    {
X        line[i] = '\n';
X        saw_eof = 1;
X        cptr = line;
X        return;
X    }
X    }
X}
X
X
Xchar *
Xdup_line()
X{
X    register char *p, *s, *t;
X
X    if (line == 0) return (0);
X    s = line;
X    while (*s != '\n') ++s;
X    p = MALLOC(s - line + 1);
X    if (p == 0) no_space();
X
X    s = line;
X    t = p;
X    while ((*t++ = *s++) != '\n') continue;
X    return (p);
X}
X
X
Xskip_comment()
X{
X    register char *s;
X
X    int st_lineno = lineno;
X    char *st_line = dup_line();
X    char *st_cptr = st_line + (cptr - line);
X
X    s = cptr + 2;
X    for (;;)
X    {
X    if (*s == '*' && s[1] == '/')
X    {
X        cptr = s + 2;
X        FREE(st_line);
X        return;
X    }
X    if (*s == '\n')
X    {
X        get_line();
X        if (line == 0)
X        unterminated_comment(st_lineno, st_line, st_cptr);
X        s = cptr;
X    }
X    else
X        ++s;
X    }
X}
X
X
Xint
Xnextc()
X{
X    register char *s;
X
X    if (line == 0)
X    {
X    get_line();
X    if (line == 0)
X        return (EOF);
X    }
X
X    s = cptr;
X    for (;;)
X    {
X    switch (*s)
X    {
X    case '\n':
X        get_line();
X        if (line == 0) return (EOF);
X        s = cptr;
X        break;
X
X    case ' ':
X    case '\t':
X    case '\f':
X    case '\r':
X    case '\v':
X    case ',':
X    case ';':
X        ++s;
X        break;
X
X    case '\\':
X        cptr = s;
X        return ('%');
X
X    case '/':
X        if (s[1] == '*')
X        {
X        cptr = s;
X        skip_comment();
X        s = cptr;
X        break;
X        }
X        else if (s[1] == '/')
X        {
X        get_line();
X        if (line == 0) return (EOF);
X        s = cptr;
X        break;
X        }
X        /* fall through */
X
X    default:
X        cptr = s;
X        return (*s);
X    }
X    }
X}
X
X
Xint
Xkeyword()
X{
X    register int c;
X    char *t_cptr = cptr;
X
X    c = *++cptr;
X    if (isalpha(c))
X    {
X    cinc = 0;
X    for (;;)
X    {
X        if (isalpha(c))
X        {
X        if (isupper(c)) c = tolower(c);
X        cachec(c);
X        }
X        else if (isdigit(c) || c == '_' || c == '.' || c == '$')
X        cachec(c);
X        else
X        break;
X        c = *++cptr;
X    }
X    cachec(NUL);
X
X    if (strcmp(cache, "token") == 0 || strcmp(cache, "term") == 0)
X        return (TOKEN);
X    if (strcmp(cache, "type") == 0)
X        return (TYPE);
X    if (strcmp(cache, "left") == 0)
X        return (LEFT);
X    if (strcmp(cache, "right") == 0)
X        return (RIGHT);
X    if (strcmp(cache, "nonassoc") == 0 || strcmp(cache, "binary") == 0)
X        return (NONASSOC);
X    if (strcmp(cache, "start") == 0)
X        return (START);
X    if (strcmp(cache, "union") == 0)
X        return (UNION);
X    if (strcmp(cache, "ident") == 0)
X        return (IDENT);
X    }
X    else
X    {
X    ++cptr;
X    if (c == '{')
X        return (TEXT);
X    if (c == '%' || c == '\\')
X        return (MARK);
X    if (c == '<')
X        return (LEFT);
X    if (c == '>')
X        return (RIGHT);
X    if (c == '0')
X        return (TOKEN);
X    if (c == '2')
X        return (NONASSOC);
X    }
X    syntax_error(lineno, line, t_cptr);
X    /*NOTREACHED*/
X}
X
X
Xcopy_ident()
X{
X    register int c;
X    register FILE *f = output_file;
X
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    if (c != '"') syntax_error(lineno, line, cptr);
X    ++outline;
X    fprintf(f, "#ident \"");
X    for (;;)
X    {
X    c = *++cptr;
X    if (c == '\n')
X    {
X        fprintf(f, "\"\n");
X        return;
X    }
X    putc(c, f);
X    if (c == '"')
X    {
X        putc('\n', f);
X        ++cptr;
X        return;
X    }
X    }
X}
X
X
Xcopy_text()
X{
X    register int c;
X    int quote;
X    register FILE *f = text_file;
X    int need_newline = 0;
X    int t_lineno = lineno;
X    char *t_line = dup_line();
X    char *t_cptr = t_line + (cptr - line - 2);
X
X    if (*cptr == '\n')
X    {
X    get_line();
X    if (line == 0)
X        unterminated_text(t_lineno, t_line, t_cptr);
X    }
X    if (!lflag) fprintf(f, line_format, lineno, input_file_name);
X
Xloop:
X    c = *cptr++;
X    switch (c)
X    {
X    case '\n':
X    next_line:
X    putc('\n', f);
X    need_newline = 0;
X    get_line();
X    if (line) goto loop;
X    unterminated_text(t_lineno, t_line, t_cptr);
X
X    case '\'':
X    case '"':
X    {
X        int s_lineno = lineno;
X        char *s_line = dup_line();
X        char *s_cptr = s_line + (cptr - line - 1);
X
X        quote = c;
X        putc(c, f);
X        for (;;)
X        {
X        c = *cptr++;
X        putc(c, f);
X        if (c == quote)
X        {
X            need_newline = 1;
X            FREE(s_line);
X            goto loop;
X        }
X        if (c == '\n')
X            unterminated_string(s_lineno, s_line, s_cptr);
X        if (c == '\\')
X        {
X            c = *cptr++;
X            putc(c, f);
X            if (c == '\n')
X            {
X            get_line();
X            if (line == 0)
X                unterminated_string(s_lineno, s_line, s_cptr);
X            }
X        }
X        }
X    }
X
X    case '/':
X    putc(c, f);
X    need_newline = 1;
X    c = *cptr;
X    if (c == '/')
X    {
X        putc('*', f);
X        while ((c = *++cptr) != '\n')
X        {
X        if (c == '*' && cptr[1] == '/')
X            fprintf(f, "* ");
X        else
X            putc(c, f);
X        }
X        fprintf(f, "*/");
X        goto next_line;
X    }
X    if (c == '*')
X    {
X        int c_lineno = lineno;
X        char *c_line = dup_line();
X        char *c_cptr = c_line + (cptr - line - 1);
X
X        putc('*', f);
X        ++cptr;
X        for (;;)
X        {
X        c = *cptr++;
X        putc(c, f);
X        if (c == '*' && *cptr == '/')
X        {
X            putc('/', f);
X            ++cptr;
X            FREE(c_line);
X            goto loop;
X        }
X        if (c == '\n')
X        {
X            get_line();
X            if (line == 0)
X            unterminated_comment(c_lineno, c_line, c_cptr);
X        }
X        }
X    }
X    putc('/', f);
X    need_newline = 1;
X    goto loop;
X
X    case '%':
X    case '\\':
X    if (*cptr == '}')
X    {
X        if (need_newline) putc('\n', f);
X        ++cptr;
X        FREE(t_line);
X        return;
X    }
X    /* fall through */
X
X    default:
X    putc(c, f);
X    need_newline = 1;
X    goto loop;
X    }
X}
X
X
Xcopy_union()
X{
X    register int c;
X    int quote;
X    int depth;
X    int u_lineno = lineno;
X    char *u_line = dup_line();
X    char *u_cptr = u_line + (cptr - line - 6);
X
X    if (unionized) over_unionized(cptr - 6);
X    unionized = 1;
X
X    if (!lflag)
X    fprintf(text_file, line_format, lineno, input_file_name);
X
X    fprintf(text_file, "typedef union");
X    if (dflag) fprintf(union_file, "typedef union");
X
X    depth = 0;
Xloop:
X    c = *cptr++;
X    putc(c, text_file);
X    if (dflag) putc(c, union_file);
X    switch (c)
X    {
X    case '\n':
X    next_line:
X    get_line();
X    if (line == 0) unterminated_union(u_lineno, u_line, u_cptr);
X    goto loop;
X
X    case '{':
X    ++depth;
X    goto loop;
X
X    case '}':
X    if (--depth == 0)
X    {
X        fprintf(text_file, " YYSTYPE;\n");
X        FREE(u_line);
X        return;
X    }
X    goto loop;
X
X    case '\'':
X    case '"':
X    {
X        int s_lineno = lineno;
X        char *s_line = dup_line();
X        char *s_cptr = s_line + (cptr - line - 1);
X
X        quote = c;
X        for (;;)
X        {
X        c = *cptr++;
X        putc(c, text_file);
X        if (dflag) putc(c, union_file);
X        if (c == quote)
X        {
X            FREE(s_line);
X            goto loop;
X        }
X        if (c == '\n')
X            unterminated_string(s_lineno, s_line, s_cptr);
X        if (c == '\\')
X        {
X            c = *cptr++;
X            putc(c, text_file);
X            if (dflag) putc(c, union_file);
X            if (c == '\n')
X            {
X            get_line();
X            if (line == 0)
X                unterminated_string(s_lineno, s_line, s_cptr);
X            }
X        }
X        }
X    }
X
X    case '/':
X    c = *cptr;
X    if (c == '/')
X    {
X        putc('*', text_file);
X        if (dflag) putc('*', union_file);
X        while ((c = *++cptr) != '\n')
X        {
X        if (c == '*' && cptr[1] == '/')
X        {
X            fprintf(text_file, "* ");
X            if (dflag) fprintf(union_file, "* ");
X        }
X        else
X        {
X            putc(c, text_file);
X            if (dflag) putc(c, union_file);
X        }
X        }
X        fprintf(text_file, "*/\n");
X        if (dflag) fprintf(union_file, "*/\n");
X        goto next_line;
X    }
X    if (c == '*')
X    {
X        int c_lineno = lineno;
X        char *c_line = dup_line();
X        char *c_cptr = c_line + (cptr - line - 1);
X
X        putc('*', text_file);
X        if (dflag) putc('*', union_file);
X        ++cptr;
X        for (;;)
X        {
X        c = *cptr++;
X        putc(c, text_file);
X        if (dflag) putc(c, union_file);
X        if (c == '*' && *cptr == '/')
X        {
X            putc('/', text_file);
X            if (dflag) putc('/', union_file);
X            ++cptr;
X            FREE(c_line);
X            goto loop;
X        }
X        if (c == '\n')
X        {
X            get_line();
X            if (line == 0)
X            unterminated_comment(c_lineno, c_line, c_cptr);
X        }
X        }
X    }
X    goto loop;
X
X    default:
X    goto loop;
X    }
X}
X
X
Xint
Xhexval(c)
Xint c;
X{
X    if (c >= '0' && c <= '9')
X    return (c - '0');
X    if (c >= 'A' && c <= 'F')
X    return (c - 'A' + 10);
X    if (c >= 'a' && c <= 'f')
X    return (c - 'a' + 10);
X    return (-1);
X}
X
X
Xbucket *
Xget_literal()
X{
X    register int c, quote;
X    register int i;
X    register int n;
X    register char *s;
X    register bucket *bp;
X    int s_lineno = lineno;
X    char *s_line = dup_line();
X    char *s_cptr = s_line + (cptr - line);
X
X    quote = *cptr++;
X    cinc = 0;
X    for (;;)
X    {
X    c = *cptr++;
X    if (c == quote) break;
X    if (c == '\n') unterminated_string(s_lineno, s_line, s_cptr);
X    if (c == '\\')
X    {
X        char *c_cptr = cptr - 1;
X
X        c = *cptr++;
X        switch (c)
X        {
X        case '\n':
X        get_line();
X        if (line == 0) unterminated_string(s_lineno, s_line, s_cptr);
X        continue;
X
X        case '0': case '1': case '2': case '3':
X        case '4': case '5': case '6': case '7':
X        n = c - '0';
X        c = *cptr;
X        if (IS_OCTAL(c))
X        {
X            n = (n << 3) + (c - '0');
X            c = *++cptr;
X            if (IS_OCTAL(c))
X            {
X            n = (n << 3) + (c - '0');
X            ++cptr;
X            }
X        }
X        if (n > MAXCHAR) illegal_character(c_cptr);
X        c = n;
X            break;
X
X        case 'x':
X        c = *cptr++;
X        n = hexval(c);
X        if (n < 0 || n >= 16)
X            illegal_character(c_cptr);
X        for (;;)
X        {
X            c = *cptr;
X            i = hexval(c);
X            if (i < 0 || i >= 16) break;
X            ++cptr;
X            n = (n << 4) + i;
X            if (n > MAXCHAR) illegal_character(c_cptr);
X        }
X        c = n;
X        break;
X
X        case 'a': c = 7; break;
X        case 'b': c = '\b'; break;
X        case 'f': c = '\f'; break;
X        case 'n': c = '\n'; break;
X        case 'r': c = '\r'; break;
X        case 't': c = '\t'; break;
X        case 'v': c = '\v'; break;
X        }
X    }
X    cachec(c);
X    }
X    FREE(s_line);
X
X    n = cinc;
X    s = MALLOC(n);
X    if (s == 0) no_space();
X
X    for (i = 0; i < n; ++i)
X    s[i] = cache[i];
X
X    cinc = 0;
X    if (n == 1)
X    cachec('\'');
X    else
X    cachec('"');
X
X    for (i = 0; i < n; ++i)
X    {
X    c = ((unsigned char *)s)[i];
X    if (c == '\\' || c == cache[0])
X    {
X        cachec('\\');
X        cachec(c);
X    }
X    else if (isprint(c))
X        cachec(c);
X    else
X    {
X        cachec('\\');
X        switch (c)
X        {
X        case 7: cachec('a'); break;
X        case '\b': cachec('b'); break;
X        case '\f': cachec('f'); break;
X        case '\n': cachec('n'); break;
X        case '\r': cachec('r'); break;
X        case '\t': cachec('t'); break;
X        case '\v': cachec('v'); break;
X        default:
X        cachec(((c >> 6) & 7) + '0');
X        cachec(((c >> 3) & 7) + '0');
X        cachec((c & 7) + '0');
X        break;
X        }
X    }
X    }
X
X    if (n == 1)
X    cachec('\'');
X    else
X    cachec('"');
X
X    cachec(NUL);
X    bp = lookup(cache);
X    bp->class = TERM;
X    if (n == 1 && bp->value == UNDEFINED)
X    bp->value = *(unsigned char *)s;
X    FREE(s);
X
X    return (bp);
X}
X
X
Xint
Xis_reserved(name)
Xchar *name;
X{
X    char *s;
X
X    if (strcmp(name, ".") == 0 ||
X        strcmp(name, "$accept") == 0 ||
X        strcmp(name, "$end") == 0)
X    return (1);
X
X    if (name[0] == '$' && name[1] == '$' && isdigit(name[2]))
X    {
X    s = name + 3;
X    while (isdigit(*s)) ++s;
X    if (*s == NUL) return (1);
X    }
X
X    return (0);
X}
X
X
Xbucket *
Xget_name()
X{
X    register int c;
X
X    cinc = 0;
X    for (c = *cptr; IS_IDENT(c); c = *++cptr)
X    cachec(c);
X    cachec(NUL);
X
X    if (is_reserved(cache)) used_reserved(cache);
X
X    return (lookup(cache));
X}
X
X
Xint
Xget_number()
X{
X    register int c;
X    register int n;
X
X    n = 0;
X    for (c = *cptr; isdigit(c); c = *++cptr)
X    n = 10*n + (c - '0');
X
X    return (n);
X}
X
X
Xchar *
Xget_tag()
X{
X    register int c;
X    register int i;
X    register char *s;
X    int t_lineno = lineno;
X    char *t_line = dup_line();
X    char *t_cptr = t_line + (cptr - line);
X
X    ++cptr;
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    if (!isalpha(c) && c != '_' && c != '$')
X    illegal_tag(t_lineno, t_line, t_cptr);
X
X    cinc = 0;
X    do { cachec(c); c = *++cptr; } while (IS_IDENT(c));
X    cachec(NUL);
X
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    if (c != '>')
X    illegal_tag(t_lineno, t_line, t_cptr);
X    ++cptr;
X
X    for (i = 0; i < ntags; ++i)
X    {
X    if (strcmp(cache, tag_table[i]) == 0)
X        return (tag_table[i]);
X    }
X
X    if (ntags >= tagmax)
X    {
X    tagmax += 16;
X    tag_table = (char **)
X            (tag_table ? REALLOC(tag_table, tagmax*sizeof(char *))
X                   : MALLOC(tagmax*sizeof(char *)));
X    if (tag_table == 0) no_space();
X    }
X
X    s = MALLOC(cinc);
X    if  (s == 0) no_space();
X    strcpy(s, cache);
X    tag_table[ntags] = s;
X    ++ntags;
X    FREE(t_line);
X    return (s);
X}
X
X
Xdeclare_tokens(assoc)
Xint assoc;
X{
X    register int c;
X    register bucket *bp;
X    int value;
X    char *tag = 0;
X
X    if (assoc != TOKEN) ++prec;
X
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    if (c == '<')
X    {
X    tag = get_tag();
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    }
X
X    for (;;)
X    {
X    if (isalpha(c) || c == '_' || c == '.' || c == '$')
X        bp = get_name();
X    else if (c == '\'' || c == '"')
X        bp = get_literal();
X    else
X        return;
X
X    if (bp == goal) tokenized_start(bp->name);
X    bp->class = TERM;
X
X    if (tag)
X    {
X        if (bp->tag && tag != bp->tag)
X        retyped_warning(bp->name);
X        bp->tag = tag;
X    }
X
X    if (assoc != TOKEN)
X    {
X        if (bp->prec && prec != bp->prec)
X        reprec_warning(bp->name);
X        bp->assoc = assoc;
X        bp->prec = prec;
X    }
X
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    value = UNDEFINED;
X    if (isdigit(c))
X    {
X        value = get_number();
X        if (bp->value != UNDEFINED && value != bp->value)
X        revalued_warning(bp->name);
X        bp->value = value;
X        c = nextc();
X        if (c == EOF) unexpected_EOF();
X    }
X    }
X}
X
X
Xdeclare_types()
X{
X    register int c;
X    register bucket *bp;
X    char *tag;
X
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    if (c != '<') syntax_error(lineno, line, cptr);
X    tag = get_tag();
X
X    for (;;)
X    {
X    c = nextc();
X    if (isalpha(c) || c == '_' || c == '.' || c == '$')
X        bp = get_name();
X    else if (c == '\'' || c == '"')
X        bp = get_literal();
X    else
X        return;
X
X    if (bp->tag && tag != bp->tag)
X        retyped_warning(bp->name);
X    bp->tag = tag;
X    }
X}
X
X
Xdeclare_start()
X{
X    register int c;
X    register bucket *bp;
X
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    if (!isalpha(c) && c != '_' && c != '.' && c != '$')
X    syntax_error(lineno, line, cptr);
X    bp = get_name();
X    if (bp->class == TERM)
X    terminal_start(bp->name);
X    if (goal && goal != bp)
X    restarted_warning();
X    goal = bp;
X}
X
X
Xread_declarations()
X{
X    register int c, k;
X
X    cache_size = 256;
X    cache = MALLOC(cache_size);
X    if (cache == 0) no_space();
X
X    for (;;)
X    {
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    if (c != '%') syntax_error(lineno, line, cptr);
X    switch (k = keyword())
X    {
X    case MARK:
X        return;
X
X    case IDENT:
X        copy_ident();
X        break;
X
X    case TEXT:
X        copy_text();
X        break;
X
X    case UNION:
X        copy_union();
X        break;
X
X    case TOKEN:
X    case LEFT:
X    case RIGHT:
X    case NONASSOC:
X        declare_tokens(k);
X        break;
X
X    case TYPE:
X        declare_types();
X        break;
X
X    case START:
X        declare_start();
X        break;
X    }
X    }
X}
X
X
Xinitialize_grammar()
X{
X    nitems = 4;
X    maxitems = 300;
X    pitem = (bucket **) MALLOC(maxitems*sizeof(bucket *));
X    if (pitem == 0) no_space();
X    pitem[0] = 0;
X    pitem[1] = 0;
X    pitem[2] = 0;
X    pitem[3] = 0;
X
X    nrules = 3;
X    maxrules = 100;
X    plhs = (bucket **) MALLOC(maxrules*sizeof(bucket *));
X    if (plhs == 0) no_space();
X    plhs[0] = 0;
X    plhs[1] = 0;
X    plhs[2] = 0;
X    rprec = (short *) MALLOC(maxrules*sizeof(short));
X    if (rprec == 0) no_space();
X    rprec[0] = 0;
X    rprec[1] = 0;
X    rprec[2] = 0;
X    rassoc = (char *) MALLOC(maxrules*sizeof(char));
X    if (rassoc == 0) no_space();
X    rassoc[0] = TOKEN;
X    rassoc[1] = TOKEN;
X    rassoc[2] = TOKEN;
X}
X
X
Xexpand_items()
X{
X    maxitems += 300;
X    pitem = (bucket **) REALLOC(pitem, maxitems*sizeof(bucket *));
X    if (pitem == 0) no_space();
X}
X
X
Xexpand_rules()
X{
X    maxrules += 100;
X    plhs = (bucket **) REALLOC(plhs, maxrules*sizeof(bucket *));
X    if (plhs == 0) no_space();
X    rprec = (short *) REALLOC(rprec, maxrules*sizeof(short));
X    if (rprec == 0) no_space();
X    rassoc = (char *) REALLOC(rassoc, maxrules*sizeof(char));
X    if (rassoc == 0) no_space();
X}
X
X
Xadvance_to_start()
X{
X    register int c;
X    register bucket *bp;
X    char *s_cptr;
X    int s_lineno;
X
X    for (;;)
X    {
X    c = nextc();
X    if (c != '%') break;
X    s_cptr = cptr;
X    switch (keyword())
X    {
X    case MARK:
X        no_grammar();
X
X    case TEXT:
X        copy_text();
X        break;
X
X    case START:
X        declare_start();
X        break;
X
X    default:
X        syntax_error(lineno, line, s_cptr);
X    }
X    }
X
X    c = nextc();
X    if (!isalpha(c) && c != '_' && c != '.' && c != '_')
X    syntax_error(lineno, line, cptr);
X    bp = get_name();
X    if (goal == 0)
X    {
X    if (bp->class == TERM)
X        terminal_start(bp->name);
X    goal = bp;
X    }
X
X    s_lineno = lineno;
X    c = nextc();
X    if (c == EOF) unexpected_EOF();
X    if (c != ':') syntax_error(lineno, line, cptr);
X    start_rule(bp, s_lineno);
X    ++cptr;
X}
X
X
Xstart_rule(bp, s_lineno)
Xregister bucket *bp;
Xint s_lineno;
X{
X    if (bp->class == TERM)
X    terminal_lhs(s_lineno);
X    bp->class = NONTERM;
X    if (nrules >= maxrules)
X    expand_rules();
X    plhs[nrules] = bp;
X    rprec[nrules] = UNDEFINED;
X    rassoc[nrules] = TOKEN;
X}
X
X
Xend_rule()
X{
X    register int i;
X
X    if (!last_was_action && plhs[nrules]->tag)
X    {
X    for (i = nitems - 1; pitem[i]; --i) continue;
X    if (pitem[i+1]->tag != plhs[nrules]->tag)
X        default_action_warning();
X    }
X
X    last_was_action = 0;
X    if (nitems >= maxitems) expand_items();
X    pitem[nitems] = 0;
X    ++nitems;
X    ++nrules;
X}
X
X
Xinsert_empty_rule()
X{
X    register bucket *bp, **bpp;
X
X    assert(cache);
X    sprintf(cache, "$$%d", ++gensym);
X    bp = make_bucket(cache);
X    last_symbol->next = bp;
X    last_symbol = bp;
X    bp->tag = plhs[nrules]->tag;
X    bp->class = NONTERM;
X
X    if ((nitems += 2) > maxitems)
X    expand_items();
X    bpp = pitem + nitems - 1;
X    *bpp-- = bp;
X    while (bpp[0] = bpp[-1]) --bpp;
X
X    if (++nrules >= maxrules)
X    expand_rules();
X    plhs[nrules] = plhs[nrules-1];
X    plhs[nrules-1] = bp;
X    rprec[nrules] = rprec[nrules-1];
X    rprec[nrules-1] = 0;
X    rassoc[nrules] = rassoc[nrules-1];
X    rassoc[nrules-1] = TOKEN;
X}
X
X
Xadd_symbol()
X{
X    register int c;
X    register bucket *bp;
X    int s_lineno = lineno;
X
X    c = *cptr;
X    if (c == '\'' || c == '"')
X    bp = get_literal();
X    else
X    bp = get_name();
X
X    c = nextc();
X    if (c == ':')
X    {
X    end_rule();
X    start_rule(bp, s_lineno);
X    ++cptr;
X    return;
X    }
X
X    if (last_was_action)
X    insert_empty_rule();
X    last_was_action = 0;
X
X    if (++nitems > maxitems)
X    expand_items();
X    pitem[nitems-1] = bp;
X}
X
X
Xcopy_action()
X{
X    register int c;
X    register int i, n;
X    int depth;
X    int quote;
X    char *tag;
X    register FILE *f = action_file;
X    int a_lineno = lineno;
X    char *a_line = dup_line();
X    char *a_cptr = a_line + (cptr - line);
X
X    if (last_was_action)
X    insert_empty_rule();
X    last_was_action = 1;
X
X    fprintf(f, "case %d:\n", nrules - 2);
X    if (!lflag)
X    fprintf(f, line_format, lineno, input_file_name);
X    if (*cptr == '=') ++cptr;
X
X    n = 0;
X    for (i = nitems - 1; pitem[i]; --i) ++n;
X
X    depth = 0;
Xloop:
X    c = *cptr;
X    if (c == '$')
X    {
X    if (cptr[1] == '<')
X    {
X        int d_lineno = lineno;
X        char *d_line = dup_line();
X        char *d_cptr = d_line + (cptr - line);
X
X        ++cptr;
X        tag = get_tag();
X        c = *cptr;
X        if (c == '$')
X        {
X        fprintf(f, "yyval.%s ", tag);
X        ++cptr;
X        FREE(d_line);
X        goto loop;
X        }
X        else if (isdigit(c))
X        {
X        i = get_number();
X        if (i > n) dollar_warning(d_lineno, i);
X        fprintf(f, "yyvsp[%d].%s ", i - n, tag);
X        FREE(d_line);
X        goto loop;
X        }
X        else if (c == '-' && isdigit(cptr[1]))
X        {
X        ++cptr;
X        i = -get_number() - n;
X        fprintf(f, "yyvsp[%d].%s ", i, tag);
X        FREE(d_line);
X        goto loop;
X        }
X        else
X        dollar_error(d_lineno, d_line, d_cptr);
X    }
X    else if (cptr[1] == '$')
X    {
X        if (ntags)
X        {
X        tag = plhs[nrules]->tag;
X        if (tag == 0) untyped_lhs();
X        fprintf(f, "yyval.%s ", tag);
X        }
X        else
X        fprintf(f, "yyval ");
X        cptr += 2;
X        goto loop;
X    }
X    else if (isdigit(cptr[1]))
X    {
X        ++cptr;
X        i = get_number();
X        if (ntags)
X        {
X        if (i <= 0 || i > n)
X            unknown_rhs(i);
X        tag = pitem[nitems + i - n - 1]->tag;
X        if (tag == 0) untyped_rhs(i, pitem[nitems + i - n - 1]->name);
X        fprintf(f, "yyvsp[%d].%s ", i - n, tag);
X        }
X        else
X        {
X        if (i > n)
X            dollar_warning(lineno, i);
X        fprintf(f, "yyvsp[%d]", i - n);
X        }
X        goto loop;
X    }
X    else if (cptr[1] == '-')
X    {
X        cptr += 2;
X        i = get_number();
X        if (ntags)
X        unknown_rhs(-i);
X        fprintf(f, "yyvsp[%d]", -i - n);
X        goto loop;
X    }
X    }
X    if (isalpha(c) || c == '_' || c == '$')
X    {
X    do
X    {
X        putc(c, f);
X        c = *++cptr;
X    } while (isalnum(c) || c == '_' || c == '$');
X    goto loop;
X    }
X    putc(c, f);
X    ++cptr;
X    switch (c)
X    {
X    case '\n':
X    next_line:
X    get_line();
X    if (line) goto loop;
X    unterminated_action(a_lineno, a_line, a_cptr);
X
X    case ';':
X    if (depth > 0) goto loop;
X    fprintf(f, "\nbreak;\n");
X    return;
X
X    case '{':
X    ++depth;
X    goto loop;
X
X    case '}':
X    if (--depth > 0) goto loop;
X    fprintf(f, "\nbreak;\n");
X    return;
X
X    case '\'':
X    case '"':
X    {
X        int s_lineno = lineno;
X        char *s_line = dup_line();
X        char *s_cptr = s_line + (cptr - line - 1);
X
X        quote = c;
X        for (;;)
X        {
X        c = *cptr++;
X        putc(c, f);
X        if (c == quote)
X        {
X            FREE(s_line);
X            goto loop;
X        }
X        if (c == '\n')
X            unterminated_string(s_lineno, s_line, s_cptr);
X        if (c == '\\')
X        {
X            c = *cptr++;
X            putc(c, f);
X            if (c == '\n')
X            {
X            get_line();
X            if (line == 0)
X                unterminated_string(s_lineno, s_line, s_cptr);
X            }
X        }
X        }
X    }
X
X    case '/':
X    c = *cptr;
X    if (c == '/')
X    {
X        putc('*', f);
X        while ((c = *++cptr) != '\n')
X        {
X        if (c == '*' && cptr[1] == '/')
X            fprintf(f, "* ");
X        else
X            putc(c, f);
X        }
X        fprintf(f, "*/\n");
X        goto next_line;
X    }
X    if (c == '*')
X    {
X        int c_lineno = lineno;
X        char *c_line = dup_line();
X        char *c_cptr = c_line + (cptr - line - 1);
X
X        putc('*', f);
X        ++cptr;
X        for (;;)
X        {
X        c = *cptr++;
X        putc(c, f);
X        if (c == '*' && *cptr == '/')
X        {
X            putc('/', f);
X            ++cptr;
X            FREE(c_line);
X            goto loop;
X        }
X        if (c == '\n')
X        {
X            get_line();
X            if (line == 0)
X            unterminated_comment(c_lineno, c_line, c_cptr);
X        }
X        }
X    }
X    goto loop;
X
X    default:
X    goto loop;
X    }
X}
X
X
Xint
Xmark_symbol()
X{
X    register int c;
X    register bucket *bp;
X
X    c = cptr[1];
X    if (c == '%' || c == '\\')
X    {
X    cptr += 2;
X    return (1);
X    }
X
X    if (c == '=')
X    cptr += 2;
X    else if ((c == 'p' || c == 'P') &&
X         ((c = cptr[2]) == 'r' || c == 'R') &&
X         ((c = cptr[3]) == 'e' || c == 'E') &&
X         ((c = cptr[4]) == 'c' || c == 'C') &&
X         ((c = cptr[5], !IS_IDENT(c))))
X    cptr += 5;
X    else
X    syntax_error(lineno, line, cptr);
X
X    c = nextc();
X    if (isalpha(c) || c == '_' || c == '.' || c == '$')
X    bp = get_name();
X    else if (c == '\'' || c == '"')
X    bp = get_literal();
X    else
X    {
X    syntax_error(lineno, line, cptr);
X    /*NOTREACHED*/
X    }
X
X    if (rprec[nrules] != UNDEFINED && bp->prec != rprec[nrules])
X    prec_redeclared();
X
X    rprec[nrules] = bp->prec;
X    rassoc[nrules] = bp->assoc;
X    return (0);
X}
X
X
Xread_grammar()
X{
X    register int c;
X
X    initialize_grammar();
X    advance_to_start();
X
X    for (;;)
X    {
X    c = nextc();
X    if (c == EOF) break;
X    if (isalpha(c) || c == '_' || c == '.' || c == '$' || c == '\'' ||
X        c == '"')
X        add_symbol();
X    else if (c == '{' || c == '=')
X        copy_action();
X    else if (c == '|')
X    {
X        end_rule();
X        start_rule(plhs[nrules-1], 0);
X        ++cptr;
X    }
X    else if (c == '%')
X    {
X        if (mark_symbol()) break;
X    }
X    else
X        syntax_error(lineno, line, cptr);
X    }
X    end_rule();
X}
X
X
Xfree_tags()
X{
X    register int i;
X
X    if (tag_table == 0) return;
X
X    for (i = 0; i < ntags; ++i)
X    {
X    assert(tag_table[i]);
X    FREE(tag_table[i]);
X    }
X    FREE(tag_table);
X}
X
X
Xpack_names()
X{
X    register bucket *bp;
X    register char *p, *s, *t;
X
X    name_pool_size = 13;  /* 13 == sizeof("$end") + sizeof("$accept") */
X    for (bp = first_symbol; bp; bp = bp->next)
X    name_pool_size += strlen(bp->name) + 1;
X    name_pool = MALLOC(name_pool_size);
X    if (name_pool == 0) no_space();
X
X    strcpy(name_pool, "$accept");
X    strcpy(name_pool+8, "$end");
X    t = name_pool + 13;
X    for (bp = first_symbol; bp; bp = bp->next)
X    {
X    p = t;
X    s = bp->name;
X    while (*t++ = *s++) continue;
X    FREE(bp->name);
X    bp->name = p;
X    }
X}
X
X
Xcheck_symbols()
X{
X    register bucket *bp;
X
X    if (goal->class == UNKNOWN)
X    undefined_goal(goal->name);
X
X    for (bp = first_symbol; bp; bp = bp->next)
X    {
X    if (bp->class == UNKNOWN)
X    {
X        undefined_symbol_warning(bp->name);
X        bp->class = TERM;
X    }
X    }
X}
X
X
Xpack_symbols()
X{
X    register bucket *bp;
X    register bucket **v;
X    register int i, j, k, n;
X
X    nsyms = 2;
X    ntokens = 1;
X    for (bp = first_symbol; bp; bp = bp->next)
X    {
X    ++nsyms;
X    if (bp->class == TERM) ++ntokens;
X    }
X    start_symbol = ntokens;
X    nvars = nsyms - ntokens;
X
X    symbol_name = (char **) MALLOC(nsyms*sizeof(char *));
X    if (symbol_name == 0) no_space();
X    symbol_value = (short *) MALLOC(nsyms*sizeof(short));
X    if (symbol_value == 0) no_space();
X    symbol_prec = (short *) MALLOC(nsyms*sizeof(short));
X    if (symbol_prec == 0) no_space();
X    symbol_assoc = MALLOC(nsyms);
X    if (symbol_assoc == 0) no_space();
X
X    v = (bucket **) MALLOC(nsyms*sizeof(bucket *));
X    if (v == 0) no_space();
X
X    v[0] = 0;
X    v[start_symbol] = 0;
X
X    i = 1;
X    j = start_symbol + 1;
X    for (bp = first_symbol; bp; bp = bp->next)
X    {
X    if (bp->class == TERM)
X        v[i++] = bp;
X    else
X        v[j++] = bp;
X    }
X    assert(i == ntokens && j == nsyms);
X
X    for (i = 1; i < ntokens; ++i)
X    v[i]->index = i;
X
X    goal->index = start_symbol + 1;
X    k = start_symbol + 2;
X    while (++i < nsyms)
X    if (v[i] != goal)
X    {
X        v[i]->index = k;
X        ++k;
X    }
X
X    goal->value = 0;
X    k = 1;
X    for (i = start_symbol + 1; i < nsyms; ++i)
X    {
X    if (v[i] != goal)
X    {
X        v[i]->value = k;
X        ++k;
X    }
X    }
X
X    k = 0;
X    for (i = 1; i < ntokens; ++i)
X    {
X    n = v[i]->value;
X    if (n > 256)
X    {
X        for (j = k++; j > 0 && symbol_value[j-1] > n; --j)
X        symbol_value[j] = symbol_value[j-1];
X        symbol_value[j] = n;
X    }
X    }
X
X    if (v[1]->value == UNDEFINED)
X    v[1]->value = 256;
X
X    j = 0;
X    n = 257;
X    for (i = 2; i < ntokens; ++i)
X    {
X    if (v[i]->value == UNDEFINED)
X    {
X        while (j < k && n == symbol_value[j])
X        {
X        while (++j < k && n == symbol_value[j]) continue;
X        ++n;
X        }
X        v[i]->value = n;
X        ++n;
X    }
X    }
X
X    symbol_name[0] = name_pool + 8;
X    symbol_value[0] = 0;
X    symbol_prec[0] = 0;
X    symbol_assoc[0] = TOKEN;
X    for (i = 1; i < ntokens; ++i)
X    {
X    symbol_name[i] = v[i]->name;
X    symbol_value[i] = v[i]->value;
X    symbol_prec[i] = v[i]->prec;
X    symbol_assoc[i] = v[i]->assoc;
X    }
X    symbol_name[start_symbol] = name_pool;
X    symbol_value[start_symbol] = -1;
X    symbol_prec[start_symbol] = 0;
X    symbol_assoc[start_symbol] = TOKEN;
X    for (++i; i < nsyms; ++i)
X    {
X    k = v[i]->index;
X    symbol_name[k] = v[i]->name;
X    symbol_value[k] = v[i]->value;
X    symbol_prec[k] = v[i]->prec;
X    symbol_assoc[k] = v[i]->assoc;
X    }
X
X    FREE(v);
X}
X
X
Xpack_grammar()
X{
X    register int i, j;
X    int assoc, prec;
X
X    ritem = (short *) MALLOC(nitems*sizeof(short));
X    if (ritem == 0) no_space();
X    rlhs = (short *) MALLOC(nrules*sizeof(short));
X    if (rlhs == 0) no_space();
X    rrhs = (short *) MALLOC((nrules+1)*sizeof(short));
X    if (rrhs == 0) no_space();
X    rprec = (short *) REALLOC(rprec, nrules*sizeof(short));
X    if (rprec == 0) no_space();
X    rassoc = REALLOC(rassoc, nrules);
X    if (rassoc == 0) no_space();
X
X    ritem[0] = -1;
X    ritem[1] = goal->index;
X    ritem[2] = 0;
X    ritem[3] = -2;
X    rlhs[0] = 0;
X    rlhs[1] = 0;
X    rlhs[2] = start_symbol;
X    rrhs[0] = 0;
X    rrhs[1] = 0;
X    rrhs[2] = 1;
X
X    j = 4;
X    for (i = 3; i < nrules; ++i)
X    {
X    rlhs[i] = plhs[i]->index;
X    rrhs[i] = j;
X    assoc = TOKEN;
X    prec = 0;
X    while (pitem[j])
X    {
X        ritem[j] = pitem[j]->index;
X        if (pitem[j]->class == TERM)
X        {
X        prec = pitem[j]->prec;
X        assoc = pitem[j]->assoc;
X        }
X        ++j;
X    }
X    ritem[j] = -i;
X    ++j;
X    if (rprec[i] == UNDEFINED)
X    {
X        rprec[i] = prec;
X        rassoc[i] = assoc;
X    }
X    }
X    rrhs[i] = j;
X
X    FREE(plhs);
X    FREE(pitem);
X}
X
X
Xprint_grammar()
X{
X    register int i, j, k;
X    int spacing;
X    register FILE *f = verbose_file;
X
X    if (!vflag) return;
X
X    k = 1;
X    for (i = 2; i < nrules; ++i)
X    {
X    if (rlhs[i] != rlhs[i-1])
X    {
X        if (i != 2) fprintf(f, "\n");
X        fprintf(f, "%4d  %s :", i - 2, symbol_name[rlhs[i]]);
X        spacing = strlen(symbol_name[rlhs[i]]) + 1;
X    }
X    else
X    {
X        fprintf(f, "%4d  ", i - 2);
X        j = spacing;
X        while (--j >= 0) putc(' ', f);
X        putc('|', f);
X    }
X
X    while (ritem[k] >= 0)
X    {
X        fprintf(f, " %s", symbol_name[ritem[k]]);
X        ++k;
X    }
X    ++k;
X    putc('\n', f);
X    }
X}
X
X
Xreader()
X{
X    write_section(banner);
X    create_symbol_table();
X    read_declarations();
X    read_grammar();
X    free_symbol_table();
X    free_tags();
X    pack_names();
X    check_symbols();
X    pack_symbols();
X    pack_grammar();
X    free_symbols();
X    print_grammar();
X}
END_OF_FILE
if test 30471 -ne `wc -c <'reader.c'`; then
    echo shar: \"'reader.c'\" unpacked with wrong size!
fi
# end of 'reader.c'
fi
if test -f 'test/ftp.y' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'test/ftp.y'\"
else
echo shar: Extracting \"'test/ftp.y'\" \(22998 characters\)
sed "s/^X//" >'test/ftp.y' <<'END_OF_FILE'
X/*
X * Copyright (c) 1985, 1988 Regents of the University of California.
X * All rights reserved.
X *
X * Redistribution and use in source and binary forms are permitted
X * provided that the above copyright notice and this paragraph are
X * duplicated in all such forms and that any documentation,
X * advertising materials, and other materials related to such
X * distribution and use acknowledge that the software was developed
X * by the University of California, Berkeley.  The name of the
X * University may not be used to endorse or promote products derived
X * from this software without specific prior written permission.
X * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
X * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
X * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
X *
X *    @(#)ftpcmd.y    5.20.1.1 (Berkeley) 3/2/89
X */
X
X/*
X * Grammar for FTP commands.
X * See RFC 959.
X */
X
X%{
X
X#ifndef lint
Xstatic char sccsid[] = "@(#)ftpcmd.y    5.20.1.1 (Berkeley) 3/2/89";
X#endif /* not lint */
X
X#include <sys/param.h>
X#include <sys/socket.h>
X
X#include <netinet/in.h>
X
X#include <arpa/ftp.h>
X
X#include <stdio.h>
X#include <signal.h>
X#include <ctype.h>
X#include <pwd.h>
X#include <setjmp.h>
X#include <syslog.h>
X#include <sys/stat.h>
X#include <time.h>
X
Xextern    struct sockaddr_in data_dest;
Xextern    int logged_in;
Xextern    struct passwd *pw;
Xextern    int guest;
Xextern    int logging;
Xextern    int type;
Xextern    int form;
Xextern    int debug;
Xextern    int timeout;
Xextern    int maxtimeout;
Xextern  int pdata;
Xextern    char hostname[], remotehost[];
Xextern    char proctitle[];
Xextern    char *globerr;
Xextern    int usedefault;
Xextern  int transflag;
Xextern  char tmpline[];
Xchar    **glob();
X
Xstatic    int cmd_type;
Xstatic    int cmd_form;
Xstatic    int cmd_bytesz;
Xchar    cbuf[512];
Xchar    *fromname;
X
Xchar    *index();
X%}
X
X%token
X    A    B    C    E    F    I
X    L    N    P    R    S    T
X
X    SP    CRLF    COMMA    STRING    NUMBER
X
X    USER    PASS    ACCT    REIN    QUIT    PORT
X    PASV    TYPE    STRU    MODE    RETR    STOR
X    APPE    MLFL    MAIL    MSND    MSOM    MSAM
X    MRSQ    MRCP    ALLO    REST    RNFR    RNTO
X    ABOR    DELE    CWD    LIST    NLST    SITE
X    STAT    HELP    NOOP    MKD    RMD    PWD
X    CDUP    STOU    SMNT    SYST    SIZE    MDTM
X
X    UMASK    IDLE    CHMOD
X
X    LEXERR
X
X%start    cmd_list
X
X%%
X
Xcmd_list:    /* empty */
X    |    cmd_list cmd
X        = {
X            fromname = (char *) 0;
X        }
X    |    cmd_list rcmd
X    ;
X
Xcmd:        USER SP username CRLF
X        = {
X            user((char *) $3);
X            free((char *) $3);
X        }
X    |    PASS SP password CRLF
X        = {
X            pass((char *) $3);
X            free((char *) $3);
X        }
X    |    PORT SP host_port CRLF
X        = {
X            usedefault = 0;
X            if (pdata >= 0) {
X                (void) close(pdata);
X                pdata = -1;
X            }
X            reply(200, "PORT command successful.");
X        }
X    |    PASV CRLF
X        = {
X            passive();
X        }
X    |    TYPE SP type_code CRLF
X        = {
X            switch (cmd_type) {
X
X            case TYPE_A:
X                if (cmd_form == FORM_N) {
X                    reply(200, "Type set to A.");
X                    type = cmd_type;
X                    form = cmd_form;
X                } else
X                    reply(504, "Form must be N.");
X                break;
X
X            case TYPE_E:
X                reply(504, "Type E not implemented.");
X                break;
X
X            case TYPE_I:
X                reply(200, "Type set to I.");
X                type = cmd_type;
X                break;
X
X            case TYPE_L:
X#if NBBY == 8
X                if (cmd_bytesz == 8) {
X                    reply(200,
X                        "Type set to L (byte size 8).");
X                    type = cmd_type;
X                } else
X                    reply(504, "Byte size must be 8.");
X#else /* NBBY == 8 */
X                UNIMPLEMENTED for NBBY != 8
X#endif /* NBBY == 8 */
X            }
X        }
X    |    STRU SP struct_code CRLF
X        = {
X            switch ($3) {
X
X            case STRU_F:
X                reply(200, "STRU F ok.");
X                break;
X
X            default:
X                reply(504, "Unimplemented STRU type.");
X            }
X        }
X    |    MODE SP mode_code CRLF
X        = {
X            switch ($3) {
X
X            case MODE_S:
X                reply(200, "MODE S ok.");
X                break;
X
X            default:
X                reply(502, "Unimplemented MODE type.");
X            }
X        }
X    |    ALLO SP NUMBER CRLF
X        = {
X            reply(202, "ALLO command ignored.");
X        }
X    |    ALLO SP NUMBER SP R SP NUMBER CRLF
X        = {
X            reply(202, "ALLO command ignored.");
X        }
X    |    RETR check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                retrieve((char *) 0, (char *) $4);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    STOR check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                store((char *) $4, "w", 0);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    APPE check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                store((char *) $4, "a", 0);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    NLST check_login CRLF
X        = {
X            if ($2)
X                send_file_list(".");
X        }
X    |    NLST check_login SP STRING CRLF
X        = {
X            if ($2 && $4 != NULL)
X                send_file_list((char *) $4);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    LIST check_login CRLF
X        = {
X            if ($2)
X                retrieve("/bin/ls -lgA", "");
X        }
X    |    LIST check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                retrieve("/bin/ls -lgA %s", (char *) $4);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    STAT check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                statfilecmd((char *) $4);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    STAT CRLF
X        = {
X            statcmd();
X        }
X    |    DELE check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                delete((char *) $4);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    RNTO SP pathname CRLF
X        = {
X            if (fromname) {
X                renamecmd(fromname, (char *) $3);
X                free(fromname);
X                fromname = (char *) 0;
X            } else {
X                reply(503, "Bad sequence of commands.");
X            }
X            free((char *) $3);
X        }
X    |    ABOR CRLF
X        = {
X            reply(225, "ABOR command successful.");
X        }
X    |    CWD check_login CRLF
X        = {
X            if ($2)
X                cwd(pw->pw_dir);
X        }
X    |    CWD check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                cwd((char *) $4);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    HELP CRLF
X        = {
X            help(cmdtab, (char *) 0);
X        }
X    |    HELP SP STRING CRLF
X        = {
X            register char *cp = (char *)$3;
X
X            if (strncasecmp(cp, "SITE", 4) == 0) {
X                cp = (char *)$3 + 4;
X                if (*cp == ' ')
X                    cp++;
X                if (*cp)
X                    help(sitetab, cp);
X                else
X                    help(sitetab, (char *) 0);
X            } else
X                help(cmdtab, (char *) $3);
X        }
X    |    NOOP CRLF
X        = {
X            reply(200, "NOOP command successful.");
X        }
X    |    MKD check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                makedir((char *) $4);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    RMD check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                removedir((char *) $4);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    PWD check_login CRLF
X        = {
X            if ($2)
X                pwd();
X        }
X    |    CDUP check_login CRLF
X        = {
X            if ($2)
X                cwd("..");
X        }
X    |    SITE SP HELP CRLF
X        = {
X            help(sitetab, (char *) 0);
X        }
X    |    SITE SP HELP SP STRING CRLF
X        = {
X            help(sitetab, (char *) $5);
X        }
X    |    SITE SP UMASK check_login CRLF
X        = {
X            int oldmask;
X
X            if ($4) {
X                oldmask = umask(0);
X                (void) umask(oldmask);
X                reply(200, "Current UMASK is %03o", oldmask);
X            }
X        }
X    |    SITE SP UMASK check_login SP octal_number CRLF
X        = {
X            int oldmask;
X
X            if ($4) {
X                if (($6 == -1) || ($6 > 0777)) {
X                    reply(501, "Bad UMASK value");
X                } else {
X                    oldmask = umask($6);
X                    reply(200,
X                        "UMASK set to %03o (was %03o)",
X                        $6, oldmask);
X                }
X            }
X        }
X    |    SITE SP CHMOD check_login SP octal_number SP pathname CRLF
X        = {
X            if ($4 && ($8 != NULL)) {
X                if ($6 > 0777)
X                    reply(501,
X                "CHMOD: Mode value must be between 0 and 0777");
X                else if (chmod((char *) $8, $6) < 0)
X                    perror_reply(550, (char *) $8);
X                else
X                    reply(200, "CHMOD command successful.");
X            }
X            if ($8 != NULL)
X                free((char *) $8);
X        }
X    |    SITE SP IDLE CRLF
X        = {
X            reply(200,
X                "Current IDLE time limit is %d seconds; max %d",
X                timeout, maxtimeout);
X        }
X    |    SITE SP IDLE SP NUMBER CRLF
X        = {
X            if ($5 < 30 || $5 > maxtimeout) {
X                reply(501,
X            "Maximum IDLE time must be between 30 and %d seconds",
X                    maxtimeout);
X            } else {
X                timeout = $5;
X                (void) alarm((unsigned) timeout);
X                reply(200,
X                    "Maximum IDLE time set to %d seconds",
X                    timeout);
X            }
X        }
X    |    STOU check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                store((char *) $4, "w", 1);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    SYST CRLF
X        = {
X#ifdef unix
X#ifdef BSD
X            reply(215, "UNIX Type: L%d Version: BSD-%d",
X                NBBY, BSD);
X#else /* BSD */
X            reply(215, "UNIX Type: L%d", NBBY);
X#endif /* BSD */
X#else /* unix */
X            reply(215, "UNKNOWN Type: L%d", NBBY);
X#endif /* unix */
X        }
X
X        /*
X         * SIZE is not in RFC959, but Postel has blessed it and
X         * it will be in the updated RFC.
X         *
X         * Return size of file in a format suitable for
X         * using with RESTART (we just count bytes).
X         */
X    |    SIZE check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL)
X                sizecmd((char *) $4);
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X
X        /*
X         * MDTM is not in RFC959, but Postel has blessed it and
X         * it will be in the updated RFC.
X         *
X         * Return modification time of file as an ISO 3307
X         * style time. E.g. YYYYMMDDHHMMSS or YYYYMMDDHHMMSS.xxx
X         * where xxx is the fractional second (of any precision,
X         * not necessarily 3 digits)
X         */
X    |    MDTM check_login SP pathname CRLF
X        = {
X            if ($2 && $4 != NULL) {
X                struct stat stbuf;
X                if (stat((char *) $4, &stbuf) < 0)
X                    perror_reply(550, "%s", (char *) $4);
X                else if ((stbuf.st_mode&S_IFMT) != S_IFREG) {
X                    reply(550, "%s: not a plain file.",
X                        (char *) $4);
X                } else {
X                    register struct tm *t;
X                    struct tm *gmtime();
X                    t = gmtime(&stbuf.st_mtime);
X                    reply(213,
X                        "19%02d%02d%02d%02d%02d%02d",
X                        t->tm_year, t->tm_mon+1, t->tm_mday,
X                        t->tm_hour, t->tm_min, t->tm_sec);
X                }
X            }
X            if ($4 != NULL)
X                free((char *) $4);
X        }
X    |    QUIT CRLF
X        = {
X            reply(221, "Goodbye.");
X            dologout(0);
X        }
X    |    error CRLF
X        = {
X            yyerrok;
X        }
X    ;
Xrcmd:        RNFR check_login SP pathname CRLF
X        = {
X            char *renamefrom();
X
X            if ($2 && $4) {
X                fromname = renamefrom((char *) $4);
X                if (fromname == (char *) 0 && $4) {
X                    free((char *) $4);
X                }
X            }
X        }
X    ;
X
Xusername:    STRING
X    ;
X
Xpassword:    /* empty */
X        = {
X            *(char **)&($$) = "";
X        }
X    |    STRING
X    ;
X
Xbyte_size:    NUMBER
X    ;
X
Xhost_port:    NUMBER COMMA NUMBER COMMA NUMBER COMMA NUMBER COMMA
X        NUMBER COMMA NUMBER
X        = {
X            register char *a, *p;
X
X            a = (char *)&data_dest.sin_addr;
X            a[0] = $1; a[1] = $3; a[2] = $5; a[3] = $7;
X            p = (char *)&data_dest.sin_port;
X            p[0] = $9; p[1] = $11;
X            data_dest.sin_family = AF_INET;
X        }
X    ;
X
Xform_code:    N
X    = {
X        $$ = FORM_N;
X    }
X    |    T
X    = {
X        $$ = FORM_T;
X    }
X    |    C
X    = {
X        $$ = FORM_C;
X    }
X    ;
X
Xtype_code:    A
X    = {
X        cmd_type = TYPE_A;
X        cmd_form = FORM_N;
X    }
X    |    A SP form_code
X    = {
X        cmd_type = TYPE_A;
X        cmd_form = $3;
X    }
X    |    E
X    = {
X        cmd_type = TYPE_E;
X        cmd_form = FORM_N;
X    }
X    |    E SP form_code
X    = {
X        cmd_type = TYPE_E;
X        cmd_form = $3;
X    }
X    |    I
X    = {
X        cmd_type = TYPE_I;
X    }
X    |    L
X    = {
X        cmd_type = TYPE_L;
X        cmd_bytesz = NBBY;
X    }
X    |    L SP byte_size
X    = {
X        cmd_type = TYPE_L;
X        cmd_bytesz = $3;
X    }
X    /* this is for a bug in the BBN ftp */
X    |    L byte_size
X    = {
X        cmd_type = TYPE_L;
X        cmd_bytesz = $2;
X    }
X    ;
X
Xstruct_code:    F
X    = {
X        $$ = STRU_F;
X    }
X    |    R
X    = {
X        $$ = STRU_R;
X    }
X    |    P
X    = {
X        $$ = STRU_P;
X    }
X    ;
X
Xmode_code:    S
X    = {
X        $$ = MODE_S;
X    }
X    |    B
X    = {
X        $$ = MODE_B;
X    }
X    |    C
X    = {
X        $$ = MODE_C;
X    }
X    ;
X
Xpathname:    pathstring
X    = {
X        /*
X         * Problem: this production is used for all pathname
X         * processing, but only gives a 550 error reply.
X         * This is a valid reply in some cases but not in others.
X         */
X        if (logged_in && $1 && strncmp((char *) $1, "~", 1) == 0) {
X            *(char **)&($$) = *glob((char *) $1);
X            if (globerr != NULL) {
X                reply(550, globerr);
X                $$ = NULL;
X            }
X            free((char *) $1);
X        } else
X            $$ = $1;
X    }
X    ;
X
Xpathstring:    STRING
X    ;
X
Xoctal_number:    NUMBER
X    = {
X        register int ret, dec, multby, digit;
X
X        /*
X         * Convert a number that was read as decimal number
X         * to what it would be if it had been read as octal.
X         */
X        dec = $1;
X        multby = 1;
X        ret = 0;
X        while (dec) {
X            digit = dec%10;
X            if (digit > 7) {
X                ret = -1;
X                break;
X            }
X            ret += digit * multby;
X            multby *= 8;
X            dec /= 10;
X        }
X        $$ = ret;
X    }
X    ;
X
Xcheck_login:    /* empty */
X    = {
X        if (logged_in)
X            $$ = 1;
X        else {
X            reply(530, "Please login with USER and PASS.");
X            $$ = 0;
X        }
X    }
X    ;
X
X%%
X
Xextern jmp_buf errcatch;
X
X#define    CMD    0    /* beginning of command */
X#define    ARGS    1    /* expect miscellaneous arguments */
X#define    STR1    2    /* expect SP followed by STRING */
X#define    STR2    3    /* expect STRING */
X#define    OSTR    4    /* optional SP then STRING */
X#define    ZSTR1    5    /* SP then optional STRING */
X#define    ZSTR2    6    /* optional STRING after SP */
X#define    SITECMD    7    /* SITE command */
X#define    NSTR    8    /* Number followed by a string */
X
Xstruct tab {
X    char    *name;
X    short    token;
X    short    state;
X    short    implemented;    /* 1 if command is implemented */
X    char    *help;
X};
X
Xstruct tab cmdtab[] = {        /* In order defined in RFC 765 */
X    { "USER", USER, STR1, 1,    "<sp> username" },
X    { "PASS", PASS, ZSTR1, 1,    "<sp> password" },
X    { "ACCT", ACCT, STR1, 0,    "(specify account)" },
X    { "SMNT", SMNT, ARGS, 0,    "(structure mount)" },
X    { "REIN", REIN, ARGS, 0,    "(reinitialize server state)" },
X    { "QUIT", QUIT, ARGS, 1,    "(terminate service)", },
X    { "PORT", PORT, ARGS, 1,    "<sp> b0, b1, b2, b3, b4" },
X    { "PASV", PASV, ARGS, 1,    "(set server in passive mode)" },
X    { "TYPE", TYPE, ARGS, 1,    "<sp> [ A | E | I | L ]" },
X    { "STRU", STRU, ARGS, 1,    "(specify file structure)" },
X    { "MODE", MODE, ARGS, 1,    "(specify transfer mode)" },
X    { "RETR", RETR, STR1, 1,    "<sp> file-name" },
X    { "STOR", STOR, STR1, 1,    "<sp> file-name" },
X    { "APPE", APPE, STR1, 1,    "<sp> file-name" },
X    { "MLFL", MLFL, OSTR, 0,    "(mail file)" },
X    { "MAIL", MAIL, OSTR, 0,    "(mail to user)" },
X    { "MSND", MSND, OSTR, 0,    "(mail send to terminal)" },
X    { "MSOM", MSOM, OSTR, 0,    "(mail send to terminal or mailbox)" },
X    { "MSAM", MSAM, OSTR, 0,    "(mail send to terminal and mailbox)" },
X    { "MRSQ", MRSQ, OSTR, 0,    "(mail recipient scheme question)" },
X    { "MRCP", MRCP, STR1, 0,    "(mail recipient)" },
X    { "ALLO", ALLO, ARGS, 1,    "allocate storage (vacuously)" },
X    { "REST", REST, ARGS, 0,    "(restart command)" },
X    { "RNFR", RNFR, STR1, 1,    "<sp> file-name" },
X    { "RNTO", RNTO, STR1, 1,    "<sp> file-name" },
X    { "ABOR", ABOR, ARGS, 1,    "(abort operation)" },
X    { "DELE", DELE, STR1, 1,    "<sp> file-name" },
X    { "CWD",  CWD,  OSTR, 1,    "[ <sp> directory-name ]" },
X    { "XCWD", CWD,    OSTR, 1,    "[ <sp> directory-name ]" },
X    { "LIST", LIST, OSTR, 1,    "[ <sp> path-name ]" },
X    { "NLST", NLST, OSTR, 1,    "[ <sp> path-name ]" },
X    { "SITE", SITE, SITECMD, 1,    "site-cmd [ <sp> arguments ]" },
X    { "SYST", SYST, ARGS, 1,    "(get type of operating system)" },
X    { "STAT", STAT, OSTR, 1,    "[ <sp> path-name ]" },
X    { "HELP", HELP, OSTR, 1,    "[ <sp> <string> ]" },
X    { "NOOP", NOOP, ARGS, 1,    "" },
X    { "MKD",  MKD,  STR1, 1,    "<sp> path-name" },
X    { "XMKD", MKD,  STR1, 1,    "<sp> path-name" },
X    { "RMD",  RMD,  STR1, 1,    "<sp> path-name" },
X    { "XRMD", RMD,  STR1, 1,    "<sp> path-name" },
X    { "PWD",  PWD,  ARGS, 1,    "(return current directory)" },
X    { "XPWD", PWD,  ARGS, 1,    "(return current directory)" },
X    { "CDUP", CDUP, ARGS, 1,    "(change to parent directory)" },
X    { "XCUP", CDUP, ARGS, 1,    "(change to parent directory)" },
X    { "STOU", STOU, STR1, 1,    "<sp> file-name" },
X    { "SIZE", SIZE, OSTR, 1,    "<sp> path-name" },
X    { "MDTM", MDTM, OSTR, 1,    "<sp> path-name" },
X    { NULL,   0,    0,    0,    0 }
X};
X
Xstruct tab sitetab[] = {
X    { "UMASK", UMASK, ARGS, 1,    "[ <sp> umask ]" },
X    { "IDLE", IDLE, ARGS, 1,    "[ <sp> maximum-idle-time ]" },
X    { "CHMOD", CHMOD, NSTR, 1,    "<sp> mode <sp> file-name" },
X    { "HELP", HELP, OSTR, 1,    "[ <sp> <string> ]" },
X    { NULL,   0,    0,    0,    0 }
X};
X
Xstruct tab *
Xlookup(p, cmd)
X    register struct tab *p;
X    char *cmd;
X{
X
X    for (; p->name != NULL; p++)
X        if (strcmp(cmd, p->name) == 0)
X            return (p);
X    return (0);
X}
X
X#include <arpa/telnet.h>
X
X/*
X * getline - a hacked up version of fgets to ignore TELNET escape codes.
X */
Xchar *
Xgetline(s, n, iop)
X    char *s;
X    register FILE *iop;
X{
X    register c;
X    register char *cs;
X
X    cs = s;
X/* tmpline may contain saved command from urgent mode interruption */
X    for (c = 0; tmpline[c] != '\0' && --n > 0; ++c) {
X        *cs++ = tmpline[c];
X        if (tmpline[c] == '\n') {
X            *cs++ = '\0';
X            if (debug)
X                syslog(LOG_DEBUG, "command: %s", s);
X            tmpline[0] = '\0';
X            return(s);
X        }
X        if (c == 0)
X            tmpline[0] = '\0';
X    }
X    while ((c = getc(iop)) != EOF) {
X        c &= 0377;
X        if (c == IAC) {
X            if ((c = getc(iop)) != EOF) {
X            c &= 0377;
X            switch (c) {
X            case WILL:
X            case WONT:
X                c = getc(iop);
X                printf("%c%c%c", IAC, DONT, 0377&c);
X                (void) fflush(stdout);
X                continue;
X            case DO:
X            case DONT:
X                c = getc(iop);
X                printf("%c%c%c", IAC, WONT, 0377&c);
X                (void) fflush(stdout);
X                continue;
X            case IAC:
X                break;
X            default:
X                continue;    /* ignore command */
X            }
X            }
X        }
X        *cs++ = c;
X        if (--n <= 0 || c == '\n')
X            break;
X    }
X    if (c == EOF && cs == s)
X        return (NULL);
X    *cs++ = '\0';
X    if (debug)
X        syslog(LOG_DEBUG, "command: %s", s);
X    return (s);
X}
X
Xstatic int
Xtoolong()
X{
X    time_t now;
X    extern char *ctime();
X    extern time_t time();
X
X    reply(421,
X      "Timeout (%d seconds): closing control connection.", timeout);
X    (void) time(&now);
X    if (logging) {
X        syslog(LOG_INFO,
X            "User %s timed out after %d seconds at %s",
X            (pw ? pw -> pw_name : "unknown"), timeout, ctime(&now));
X    }
X    dologout(1);
X}
X
Xyylex()
X{
X    static int cpos, state;
X    register char *cp, *cp2;
X    register struct tab *p;
X    int n;
X    char c, *strpbrk();
X    char *copy();
X
X    for (;;) {
X        switch (state) {
X
X        case CMD:
X            (void) signal(SIGALRM, toolong);
X            (void) alarm((unsigned) timeout);
X            if (getline(cbuf, sizeof(cbuf)-1, stdin) == NULL) {
X                reply(221, "You could at least say goodbye.");
X                dologout(0);
X            }
X            (void) alarm(0);
X#ifdef SETPROCTITLE
X            if (strncasecmp(cbuf, "PASS", 4) != NULL)
X                setproctitle("%s: %s", proctitle, cbuf);
X#endif /* SETPROCTITLE */
X            if ((cp = index(cbuf, '\r'))) {
X                *cp++ = '\n';
X                *cp = '\0';
X            }
X            if ((cp = strpbrk(cbuf, " \n")))
X                cpos = cp - cbuf;
X            if (cpos == 0)
X                cpos = 4;
X            c = cbuf[cpos];
X            cbuf[cpos] = '\0';
X            upper(cbuf);
X            p = lookup(cmdtab, cbuf);
X            cbuf[cpos] = c;
X            if (p != 0) {
X                if (p->implemented == 0) {
X                    nack(p->name);
X                    longjmp(errcatch,0);
X                    /* NOTREACHED */
X                }
X                state = p->state;
X                *(char **)&yylval = p->name;
X                return (p->token);
X            }
X            break;
X
X        case SITECMD:
X            if (cbuf[cpos] == ' ') {
X                cpos++;
X                return (SP);
X            }
X            cp = &cbuf[cpos];
X            if ((cp2 = strpbrk(cp, " \n")))
X                cpos = cp2 - cbuf;
X            c = cbuf[cpos];
X            cbuf[cpos] = '\0';
X            upper(cp);
X            p = lookup(sitetab, cp);
X            cbuf[cpos] = c;
X            if (p != 0) {
X                if (p->implemented == 0) {
X                    state = CMD;
X                    nack(p->name);
X                    longjmp(errcatch,0);
X                    /* NOTREACHED */
X                }
X                state = p->state;
X                *(char **)&yylval = p->name;
X                return (p->token);
X            }
X            state = CMD;
X            break;
X
X        case OSTR:
X            if (cbuf[cpos] == '\n') {
X                state = CMD;
X                return (CRLF);
X            }
X            /* FALLTHROUGH */
X
X        case STR1:
X        case ZSTR1:
X        dostr1:
X            if (cbuf[cpos] == ' ') {
X                cpos++;
X                state = state == OSTR ? STR2 : ++state;
X                return (SP);
X            }
X            break;
X
X        case ZSTR2:
X            if (cbuf[cpos] == '\n') {
X                state = CMD;
X                return (CRLF);
X            }
X            /* FALLTHROUGH */
X
X        case STR2:
X            cp = &cbuf[cpos];
X            n = strlen(cp);
X            cpos += n - 1;
X            /*
X             * Make sure the string is nonempty and \n terminated.
X             */
X            if (n > 1 && cbuf[cpos] == '\n') {
X                cbuf[cpos] = '\0';
X                *(char **)&yylval = copy(cp);
X                cbuf[cpos] = '\n';
X                state = ARGS;
X                return (STRING);
X            }
X            break;
X
X        case NSTR:
X            if (cbuf[cpos] == ' ') {
X                cpos++;
X                return (SP);
X            }
X            if (isdigit(cbuf[cpos])) {
X                cp = &cbuf[cpos];
X                while (isdigit(cbuf[++cpos]))
X                    ;
X                c = cbuf[cpos];
X                cbuf[cpos] = '\0';
X                yylval = atoi(cp);
X                cbuf[cpos] = c;
X                state = STR1;
X                return (NUMBER);
X            }
X            state = STR1;
X            goto dostr1;
X
X        case ARGS:
X            if (isdigit(cbuf[cpos])) {
X                cp = &cbuf[cpos];
X                while (isdigit(cbuf[++cpos]))
X                    ;
X                c = cbuf[cpos];
X                cbuf[cpos] = '\0';
X                yylval = atoi(cp);
X                cbuf[cpos] = c;
X                return (NUMBER);
X            }
X            switch (cbuf[cpos++]) {
X
X            case '\n':
X                state = CMD;
X                return (CRLF);
X
X            case ' ':
X                return (SP);
X
X            case ',':
X                return (COMMA);
X
X            case 'A':
X            case 'a':
X                return (A);
X
X            case 'B':
X            case 'b':
X                return (B);
X
X            case 'C':
X            case 'c':
X                return (C);
X
X            case 'E':
X            case 'e':
X                return (E);
X
X            case 'F':
X            case 'f':
X                return (F);
X
X            case 'I':
X            case 'i':
X                return (I);
X
X            case 'L':
X            case 'l':
X                return (L);
X
X            case 'N':
X            case 'n':
X                return (N);
X
X            case 'P':
X            case 'p':
X                return (P);
X
X            case 'R':
X            case 'r':
X                return (R);
X
X            case 'S':
X            case 's':
X                return (S);
X
X            case 'T':
X            case 't':
X                return (T);
X
X            }
X            break;
X
X        default:
X            fatal("Unknown state in scanner.");
X        }
X        yyerror((char *) 0);
X        state = CMD;
X        longjmp(errcatch,0);
X    }
X}
X
Xupper(s)
X    register char *s;
X{
X    while (*s != '\0') {
X        if (islower(*s))
X            *s = toupper(*s);
X        s++;
X    }
X}
X
Xchar *
Xcopy(s)
X    char *s;
X{
X    char *p;
X    extern char *malloc(), *strcpy();
X
X    p = malloc((unsigned) strlen(s) + 1);
X    if (p == NULL)
X        fatal("Ran out of memory.");
X    (void) strcpy(p, s);
X    return (p);
X}
X
Xhelp(ctab, s)
X    struct tab *ctab;
X    char *s;
X{
X    register struct tab *c;
X    register int width, NCMDS;
X    char *type;
X
X    if (ctab == sitetab)
X        type = "SITE ";
X    else
X        type = "";
X    width = 0, NCMDS = 0;
X    for (c = ctab; c->name != NULL; c++) {
X        int len = strlen(c->name);
X
X        if (len > width)
X            width = len;
X        NCMDS++;
X    }
X    width = (width + 8) &~ 7;
X    if (s == 0) {
X        register int i, j, w;
X        int columns, lines;
X
X        lreply(214, "The following %scommands are recognized %s.",
X            type, "(* =>'s unimplemented)");
X        columns = 76 / width;
X        if (columns == 0)
X            columns = 1;
X        lines = (NCMDS + columns - 1) / columns;
X        for (i = 0; i < lines; i++) {
X            printf("   ");
X            for (j = 0; j < columns; j++) {
X                c = ctab + j * lines + i;
X                printf("%s%c", c->name,
X                    c->implemented ? ' ' : '*');
X                if (c + lines >= &ctab[NCMDS])
X                    break;
X                w = strlen(c->name) + 1;
X                while (w < width) {
X                    putchar(' ');
X                    w++;
X                }
X            }
X            printf("\r\n");
X        }
X        (void) fflush(stdout);
X        reply(214, "Direct comments to ftp-bugs@%s.", hostname);
X        return;
X    }
X    upper(s);
X    c = lookup(ctab, s);
X    if (c == (struct tab *)0) {
X        reply(502, "Unknown command %s.", s);
X        return;
X    }
X    if (c->implemented)
X        reply(214, "Syntax: %s%s %s", type, c->name, c->help);
X    else
X        reply(214, "%s%-*s\t%s; unimplemented.", type, width,
X            c->name, c->help);
X}
X
Xsizecmd(filename)
Xchar *filename;
X{
X    switch (type) {
X    case TYPE_L:
X    case TYPE_I: {
X        struct stat stbuf;
X        if (stat(filename, &stbuf) < 0 ||
X            (stbuf.st_mode&S_IFMT) != S_IFREG)
X            reply(550, "%s: not a plain file.", filename);
X        else
X            reply(213, "%lu", stbuf.st_size);
X        break;}
X    case TYPE_A: {
X        FILE *fin;
X        register int c, count;
X        struct stat stbuf;
X        fin = fopen(filename, "r");
X        if (fin == NULL) {
X            perror_reply(550, filename);
X            return;
X        }
X        if (fstat(fileno(fin), &stbuf) < 0 ||
X            (stbuf.st_mode&S_IFMT) != S_IFREG) {
X            reply(550, "%s: not a plain file.", filename);
X            (void) fclose(fin);
X            return;
X        }
X
X        count = 0;
X        while((c=getc(fin)) != EOF) {
X            if (c == '\n')    /* will get expanded to \r\n */
X                count++;
X            count++;
X        }
X        (void) fclose(fin);
X
X        reply(213, "%ld", count);
X        break;}
X    default:
X        reply(504, "SIZE not implemented for Type %c.", "?AEIL"[type]);
X    }
X}
END_OF_FILE
if test 22998 -ne `wc -c <'test/ftp.y'`; then
    echo shar: \"'test/ftp.y'\" unpacked with wrong size!
fi
# end of 'test/ftp.y'
fi
echo shar: End of archive 4 \(of 5\).
cp /dev/null ark4isdone
MISSING=""
for I in 1 2 3 4 5 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 5 archives.
    rm -f ark[1-9]isdone
else
    echo You still need to unpack the following archives:
    echo "        " ${MISSING}
fi
##  End of shell archive.
exit 0