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1990-05-06
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1,979 lines
#! /bin/sh
# This is a shell archive. Remove anything before this line, then feed it
# into a shell via "sh file" or similar. To overwrite existing files,
# type "sh file -c".
# The tool that generated this appeared in the comp.sources.unix newsgroup;
# send mail to comp-sources-unix@uunet.uu.net if you want that tool.
# If this archive is complete, you will see the following message at the end:
# "End of archive 5 (of 19)."
# Contents: mush/loop.c mush/pick.c
# Wrapped by argv@turnpike on Wed May 2 13:59:22 1990
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'mush/loop.c' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'mush/loop.c'\"
else
echo shar: Extracting \"'mush/loop.c'\" \(34930 characters\)
sed "s/^X//" >'mush/loop.c' <<'END_OF_FILE'
X/* loop.c (c) copyright 1986 (Dan Heller) */
X
X/*
X * Here is where the main loop for text mode exists. Also, all the
X * history is kept here and all the command parsing and execution
X * and alias expansion in or out of text/graphics mode is done here.
X */
X
X#include "mush.h"
X#include "version.h"
X
X#ifdef BSD
X#include <sys/wait.h>
X#else
X#ifndef SYSV
X#include <wait.h>
X#endif /* SYSV */
X#endif /* BSD */
X
X#define ever (;;)
X#define MAXARGS 100
X#define isdelimeter(c) (index(" \t;|", c))
X
Xchar *alias_expand(), *hist_expand(), *reference_hist(), *hist_from_str();
Xchar *calloc();
X
Xstruct history {
X int histno;
X char **argv;
X struct history *prev;
X struct history *next;
X};
Xstatic struct history *hist_head, *hist_tail;
X#define malloc(n) (struct history *)calloc((unsigned)1,(unsigned)(n))
X#define NULL_HIST (struct history *)0
X
Xstatic char *last_aliased;
Xstatic int hist_size, print_only;
X
Xdo_loop()
X{
X register char *p, **argv;
X char **last_argv = DUBL_NULL, line[256];
X int argc, c = (iscurses - 1);
X#ifdef CURSES
X int save_echo_flg = FALSE;
X#endif /* CURSES */
X
X /* catch the right signals -- see main.c for other signal catching */
X (void) signal(SIGINT, catch);
X (void) signal(SIGQUIT, catch);
X (void) signal(SIGHUP, catch);
X#ifndef SUNTOOL
X (void) signal(SIGTERM, catch);
X (void) signal(SIGCHLD,
X#ifndef SYSV
X sigchldcatcher
X#else /* SYSV */
X SIG_DFL
X#endif /* SYSV */
X );
X#endif /* SUNTOOL*/
X
X turnoff(glob_flags, IGN_SIGS);
X if (hist_size == 0) /* if user didn't set history in .rc file */
X hist_size = 1;
X
X for ever {
X if (setjmp(jmpbuf)) {
X Debug("jumped back to main loop (%s: %d)\n", __FILE__,__LINE__);
X#ifdef CURSES
X if (c > 0) { /* don't pass last command back to curses_command() */
X iscurses = TRUE;
X c = hit_return();
X }
X#endif /* CURSES */
X }
X#ifdef CURSES
X if (iscurses || c > -1) {
X /* if !iscurses, we know that we returned from a curses-based
X * call and we really ARE still in curses. Reset tty modes!
X */
X if (ison(glob_flags, ECHO_FLAG)) {
X turnoff(glob_flags, ECHO_FLAG);
X echo_off();
X save_echo_flg = TRUE;
X }
X if (!iscurses) {
X iscurses = TRUE;
X c = hit_return();
X }
X if (c < 0)
X c = 0;
X if ((c = curses_command(c)) == -1 && save_echo_flg) {
X echo_on();
X turnon(glob_flags, ECHO_FLAG);
X save_echo_flg = FALSE;
X }
X continue;
X }
X#endif /* CURSES */
X clear_msg_list(msg_list);
X (void) check_new_mail();
X
X /* print a prompt according to printf like format:
X * (current message, deleted, unread, etc) are found in mail_status.
X */
X mail_status(1);
X if (Getstr(line, sizeof(line), 0) > -1)
X p = line;
X else {
X if (isatty(0) && (p = do_set(set_options, "ignoreeof"))) {
X if (!*p)
X continue;
X else
X p = strcpy(line, p); /* so processing won't destroy var */
X } else {
X putchar('\n');
X (void) mush_quit(0, DUBL_NULL);
X continue; /* quit may return if new mail arrives */
X }
X }
X
X skipspaces(0);
X if (!*p && !(p = do_set(set_options, "newline"))) {
X (void) readmsg(0, DUBL_NULL, msg_list);
X continue;
X }
X if (!*p) /* if newline is set, but no value, then continue */
X continue;
X
X /* upon error, argc = -1 -- still save in history so user can
X * modify syntax error. if !argv, error is too severe. We pass
X * the last command typed in last_argv for history reference, and
X * get back the current command _as typed_ (unexpanded by aliases
X * or history) in last_argv.
X */
X if (!(argv = make_command(p, &last_argv, &argc)))
X continue;
X /* now save the old argv in a newly created history structure */
X (void) add_history(0, last_argv); /* argc is currently ignored */
X
X if (print_only) {
X print_only = 0;
X free_vec(argv);
X } else if (argc > -1)
X (void) do_command(argc, argv, msg_list);
X }
X}
X
X/* Add a command to the history list
X */
X/*ARGSUSED*/
Xadd_history(un_used, argv)
Xchar **argv;
X{
X struct history *new;
X
X if (!(new = malloc(sizeof (struct history))))
X error("can't increment history");
X else {
X new->histno = ++hist_no;
X new->argv = argv; /* this is the command _as typed_ */
X new->next = NULL_HIST;
X new->prev = hist_head;
X /* if first command, the tail of the list is "new" because
X * nothing is in the list. If not the first command, the
X * head of the list's "next" pointer points to the new command.
X */
X if (hist_head)
X hist_head->next = new;
X else
X hist_tail = new;
X hist_head = new;
X }
X /*
X * truncate the history list to the size of the history.
X * Free the outdated command (argv) and move the tail closer to front.
X * use a while loop in case the last command reset histsize to "small"
X */
X while (hist_head->histno - hist_tail->histno >= hist_size) {
X hist_tail = hist_tail->next;
X free_vec(hist_tail->prev->argv);
X xfree((char *) (hist_tail->prev));
X hist_tail->prev = NULL_HIST;
X }
X}
X
X/* make a command from "buf".
X * first, expand history references. make an argv from that and save
X * in last_argv (to be passed back and stored in history). After that,
X * THEN expand aliases. return that argv to be executed as a command.
X */
Xchar **
Xmake_command(start, last_argv, argc)
Xregister char *start, ***last_argv;
Xint *argc;
X{
X register char *p, **tmp;
X char buf[BUFSIZ];
X
X if (!last_argv)
X tmp = DUBL_NULL;
X else
X tmp = *last_argv;
X /* first expand history -- (here's where argc gets set)
X * pass the buffer, the history list to reference if \!* (or whatever)
X * result in static buffer (pointed to by p) -- even if history parsing is
X * ignored, do this to remove \'s behind !'s and verifying matching quotes
X */
X if (!(p = hist_expand(start, tmp, argc)) || Strcpy(buf, p) > sizeof buf)
X return DUBL_NULL;
X /* if history was referenced in the command, echo new command */
X if (*argc)
X puts(buf);
X
X /* argc may == -1; ignore this error for now but catch it later */
X if (!(tmp = mk_argv(buf, argc, 0)))
X return DUBL_NULL;
X
X /* save this as the command typed */
X if (last_argv)
X *last_argv = tmp;
X
X /* expand all aliases (recursively)
X * pass _this_ command (as typed and without aliases) to let aliases
X * with "!*" be able to reference the command line just typed.
X */
X if (alias_stuff(buf, *argc, tmp) == -1)
X return DUBL_NULL;
X
X if (!last_argv)
X free_vec(tmp);
X
X /* with everything expanded, build final argv from new buffer
X * Note that backslashes and quotes still exist. Those are removed
X * because argument final is 1.
X */
X tmp = mk_argv(buf, argc, 1);
X return tmp;
X}
X
X/* Return values from commands, see check_internal() */
Xstatic int last_status; /* Changes after every command */
Xstatic char last_output[MAXMSGS]; /* Changes after SUCCESSFUL command */
X
X/*
X * do the command specified by the argument vector, argv.
X * First check to see if argc < 0. If so, someone called this
X * command and they should not have! make_command() will return
X * an argv but it will set argc to -1 if there's a syntax error.
X */
Xdo_command(argc, argv, list)
Xchar **argv, list[];
X{
X register char *p;
X char **tmp = argv, *next_cmd = NULL;
X int i, status = 0;
X long do_pipe = ison(glob_flags, DO_PIPE);
X
X if (argc <= 0) {
X turnoff(glob_flags, DO_PIPE);
X return -1;
X }
X
X clear_msg_list(list);
X
X for (i = 0; do_pipe >= 0 && argc; argc--) {
X p = argv[i];
X /* mk_argv inserts a boolean in argv[i][2] for separators */
X if ((!strcmp(p, "|") || !strcmp(p, ";")) && p[2]) {
X if (do_pipe = (*p == '|'))
X turnon(glob_flags, DO_PIPE);
X else if (next_cmd = argv[i+1])
X argv[i+1] = NULL, argc--;
X argv[i] = NULL;
X if ((status = exec_argv(i, argv, list)) <= -1)
X mac_flush();
X else
X list_to_str(list, last_output);
X turnon(glob_flags, IGN_SIGS); /* prevent longjmp */
X /* if piping, then don't call next command if this one failed. */
X if (status <= -1 && do_pipe) {
X print("Broken pipe.\n");
X do_pipe = -1, turnoff(glob_flags, DO_PIPE);
X }
X last_status = status;
X /* if command failed and piping, or command worked and not piping */
X if (do_pipe <= 0)
X status = 0, clear_msg_list(list);
X /* else command worked and piping: set is_pipe */
X else if (!status)
X turnon(glob_flags, IS_PIPE), turnoff(glob_flags, DO_PIPE);
X argv[i] = p;
X argv += (i+1);
X i = 0;
X turnoff(glob_flags, IGN_SIGS);
X } else
X i++;
X }
X if (*argv && do_pipe >= 0) {
X status = exec_argv(i, argv, list);
X turnon(glob_flags, IGN_SIGS);
X if (status < 0) {
X mac_flush();
X } else
X list_to_str(list, last_output);
X last_status = status;
X }
X Debug("freeing: "), print_argv(tmp);
X free_vec(tmp);
X turnoff(glob_flags, DO_PIPE), turnoff(glob_flags, IS_PIPE);
X if (next_cmd) {
X if (tmp = mk_argv(next_cmd, &argc, 1)) {
X turnoff(glob_flags, IGN_SIGS);
X status = do_command(argc, tmp, list);
X turnon(glob_flags, IGN_SIGS);
X } else
X status = argc;
X xfree(next_cmd);
X }
X turnoff(glob_flags, IGN_SIGS);
X return status;
X}
X
Xexec_argv(argc, argv, list)
Xregister char **argv, list[];
X{
X register int n;
X
X if (!argv || !*argv || argv[0][0] == '\\' && !argv[0][1]) {
X if (ison(glob_flags, IS_PIPE))
X print("Invalid null command.\n");
X else if (ison(glob_flags, DO_PIPE)) {
X set_msg_bit(list, current_msg);
X return 0;
X }
X return -1;
X } else if (argv[0][0] == '\\') {
X /* Can't change *argv (breaks free_vec),
X * so shift to remove the backslash
X */
X for (n = 0; argv[0][n]; n++)
X argv[0][n] = argv[0][n+1];
X }
X Debug("executing: "), print_argv(argv);
X
X /* if interrupted during execution of a command, return -1 */
X if (isoff(glob_flags, IGN_SIGS) && setjmp(jmpbuf)) {
X Debug("jumped back to exec_argv (%s: %d)\n", __FILE__, __LINE__);
X return -1;
X }
X
X /* standard commands */
X for (n = 0; cmds[n].command; n++)
X if (!strcmp(argv[0], cmds[n].command))
X return (*cmds[n].func)(argc, argv, list);
X
X /* ucb-Mail compatible commands */
X for (n = 0; ucb_cmds[n].command; n++)
X if (!strcmp(argv[0], ucb_cmds[n].command))
X return (*ucb_cmds[n].func)(argc, argv, list);
X
X /* for hidden, undocumented commands */
X for (n = 0; hidden_cmds[n].command; n++)
X if (!strcmp(argv[0], hidden_cmds[n].command))
X return (*hidden_cmds[n].func)(argc, argv, list);
X
X n = -1; /* default to failure */
X if ((isdigit(**argv) || index("^.*$-`{}", **argv))
X && (n = get_msg_list(argv, list)) != 0) {
X if (n < 0)
X return -1;
X else if (isoff(glob_flags, DO_PIPE))
X for (n = 0; n < msg_cnt; n++)
X if (msg_bit(list, n)) {
X display_msg((current_msg = n), (long)0);
X unset_msg_bit(list, n);
X }
X return 0;
X } else {
X /* get_msg_list will set the current message bit if nothing parsed */
X if (n == 0)
X unset_msg_bit(list, current_msg);
X if (strlen(*argv) == 1 && index("$^.", **argv)) {
X if (!msg_cnt) {
X print("No messages.");
X return -1;
X } else {
X if (**argv != '.')
X current_msg = (**argv == '$') ? msg_cnt-1 : 0;
X set_msg_bit(list, current_msg);
X display_msg(current_msg, (long)0);
X }
X return 0;
X }
X }
X
X if (!istool && do_set(set_options, "unix")) {
X if (ison(glob_flags, IS_PIPE)) {
X return pipe_msg(argc, argv, list);
X } else
X execute(argv); /* try to execute a unix command */
X return -1; /* doesn't affect messages! */
X }
X
X print("%s: command not found.\n", *argv);
X if (!istool)
X print("type '?' for valid commands, or type `help'\n");
X return -1;
X}
X
X/* recursively look for aliases on a command line. aliases may
X * reference other aliases.
X */
Xalias_stuff(b, argc, Argv)
Xregister char *b, **Argv;
X{
X register char *p, **argv = DUBL_NULL;
X register int n = 0, i = 0, Argc;
X static int loops;
X int dummy;
X
X if (++loops == 20) {
X print("Alias loop.\n");
X return -1;
X }
X for (Argc = 0; Argc < argc; Argc++) {
X register char *h = Argv[n + ++i];
X register char *p2 = "";
X int sep;
X
X /* we've hit a command separator or the end of the line */
X if (h && strcmp(h, ";") && strcmp(h, "|"))
X continue;
X
X /* create a new argv containing this (possible subset) of argv */
X if (!(argv = (char **)calloc((unsigned)(i+1), sizeof (char *))))
X continue;
X sep = n + i;
X while (i--)
X strdup(argv[i], Argv[n+i]);
X
X if ((!last_aliased || strcmp(last_aliased, argv[0]))
X && (p = alias_expand(argv[0]))) {
X /* if history was referenced, ignore the rest of argv
X * else copy all of argv onto the end of the buffer.
X */
X if (!(p2 = hist_expand(p, argv, &dummy)))
X break;
X if (!dummy)
X (void) argv_to_string(p2+strlen(p2), argv+1);
X if (Strcpy(b, p2) > BUFSIZ) {
X print("Not enough buffer space.\n");
X break;
X }
X /* release old argv and build a new one based on new string */
X free_vec(argv);
X if (!(argv = mk_argv(b, &dummy, 0)))
X break;
X if (alias_stuff(b, dummy, argv) == -1)
X break;
X } else
X b = argv_to_string(b, argv);
X xfree(last_aliased), last_aliased = NULL;
X free_vec(argv);
X b += strlen(b);
X if (h) {
X b += strlen(sprintf(b, " %s ", h));
X while (++Argc < argc && (h = Argv[Argc]))
X if (Argc > sep && strcmp(h, ";"))
X break;
X n = Argc--;
X }
X i = 0;
X }
X xfree(last_aliased), last_aliased = NULL;
X --loops;
X if (Argc < argc) {
X free_vec(argv);
X return -1;
X }
X return 0;
X}
X
Xchar *
Xalias_expand(cmd)
Xregister char *cmd;
X{
X register char *p;
X register int x;
X
X if (!(p = do_set(functions, cmd)))
X return NULL;
X last_aliased = savestr(cmd); /* to be freed elsewhere; don't strdup! */
X if (isoff(glob_flags, WARNING))
X return p;
X for (x = 0; cmds[x].command; x++)
X if (!strcmp(cmd, cmds[x].command)) {
X wprint("(real command: \"%s\" aliased to \"%s\")\n", cmd, p);
X return p;
X }
X for (x = 0; ucb_cmds[x].command; x++)
X if (!strcmp(cmd, ucb_cmds[x].command)) {
X wprint("(ucb-command: \"%s\" aliased to \"%s\")\n", cmd, p);
X return p;
X }
X return p;
X}
X
Xstatic int nonobang;
X
X/* expand history references and separate message lists from other tokens */
Xchar *
Xhist_expand(str, argv, hist_was_referenced)
Xregister char *str, **argv;
Xregister int *hist_was_referenced;
X{
X static char buf[BUFSIZ];
X register int b = 0, inquotes = 0;
X int first_space = 0, ignore_bang;
X
X ignore_bang = (ison(glob_flags, IGN_BANG) ||
X do_set(set_options, "ignore_bang"));
X nonobang = !!do_set(set_options, "nonobang");
X
X if (hist_was_referenced)
X *hist_was_referenced = 0;
X while (*str) {
X while (!inquotes && isspace(*str))
X str++;
X do {
X if (!*str)
X break;
X if (b >= sizeof(buf)-1) {
X print("argument list too long.\n");
X return NULL;
X }
X if ((buf[b] = *str++) == '\'') {
X /* make sure there's a match! */
X inquotes = !inquotes;
X }
X if (!first_space && !inquotes && index("0123456789{}*$^.", buf[b])
X && b && !index("0123456789{}-^. \t", buf[b-1])) {
X buf[b+1] = buf[b];
X buf[b++] = ' ';
X while ((buf[++b] = *str++) && index("0123456789-,${}.", buf[b]))
X ;
X if (!buf[b])
X str--;
X first_space++;
X }
X /* check for (;) (|) or any other delimiter and separate it from
X * other tokens.
X */
X if (!inquotes && buf[b] != '\0' && isdelimeter(buf[b]) &&
X (b < 0 || buf[b-1] != '\\')) {
X if (!isspace(buf[b]))
X first_space = -1; /* resume msg-list separation */
X if (b && !isspace(buf[b-1]))
X buf[b+1] = buf[b], buf[b++] = ' ';
X b++;
X break;
X }
X /*
X * If double-quotes, just copy byte by byte, char by char,
X * but do remove backslashes from in front of !s
X */
X if (!inquotes && buf[b] == '"') {
X int B = b;
X while ((buf[++B] = *str++) && buf[B] != '"')
X if (*str == '!' && buf[B] == '\\')
X buf[B] = '!', str++;
X if (buf[B])
X b = B;
X else
X str--;
X b++;
X continue;
X }
X if (buf[b] == '\\') {
X first_space = 1; /* don't split escaped words */
X if ((buf[++b] = *str) == '!')
X buf[--b] = '!';
X ++str;
X } else if (buf[b] == '!' && *str && *str != '\\' && !isspace(*str)
X && !ignore_bang) {
X char word[BUFSIZ], *s;
X if (!(s = reference_hist(str, word, argv))) {
X if (!nonobang)
X return NULL;
X } else {
X str = s;
X if (hist_was_referenced)
X *hist_was_referenced = 1;
X if (strlen(word) + b >= sizeof buf) {
X print("argument list too long.\n");
X return NULL;
X }
X b += Strcpy(&buf[b], word) - 1;
X }
X }
X b++;
X } while (*str && (!isdelimeter(*str) || str[-1] == '\\'));
X if (!inquotes)
X first_space++, buf[b++] = ' ';
X }
X buf[b] = 0;
X return buf;
X}
X
X/*
X * expand references to internal variables. This allows such things
X * as $iscurses, $hdrs_only, etc. to work correctly.
X */
Xchar *
Xcheck_internal(str)
Xregister char *str;
X{
X int ret_val = -1;
X static char version[80], get_status[4];
X
X if (!strcmp(str, "iscurses"))
X ret_val = (iscurses || ison(glob_flags, PRE_CURSES));
X else if (!strcmp(str, "istool"))
X ret_val = istool;
X else if (!strcmp(str, "hdrs_only"))
X ret_val = (hdrs_only && *hdrs_only);
X else if (!strcmp(str, "is_shell"))
X ret_val = is_shell;
X else if (!strcmp(str, "is_sending"))
X ret_val = (ison(glob_flags, IS_SENDING) != 0);
X else if (!strcmp(str, "redirect"))
X ret_val = (isatty(0) != 0);
X else if (!strcmp(str, "thisfolder"))
X return (mailfile && *mailfile) ? mailfile : NULL;
X else if (!strcmp(str, "status"))
X return sprintf(get_status, "%d", last_status);
X else if (!strcmp(str, "output"))
X return last_output;
X else if (!strcmp(str, "version")) {
X /* Create the version string ONCE, then re-use it. */
X if (!*version)
X (void) sprintf(version, "%s (%d.%s.%d %s)",
X MUSHNAME, RELEASE, REVISION, PATCHLEVEL, RELEASE_DATE);
X return version;
X }
X
X return ret_val > 0 ? "1" : ret_val == 0? "0" : NULL;
X}
X
X/*
X * Structure for expansions
X * (move to a header file?)
X */
Xstruct expand {
X char *orig; /* string beginning with substring to be expanded */
X char *exp; /* result of expansion of substring */
X char *rest; /* rest of the original string beyond substring */
X};
X
X/*
X * Parse and expand a single variable reference. Variable references
X * begin with a '$' and thereafter look like any of:
X * $ $$ is the pid of the current process
X * [%x] $[%x] expands %x as a hdr_format character ($%x is same)
X * (%x) $(%x) expands %x as a prompt format character
X * name Value of variable "name" (error if not set)
X * v:x Modified expansion; v is any of above, x is any of
X * h head of a file pathname
X * t tail of a file pathname
X * l value converted to lowercase
X * u value converted to uppercase
X * q quote against further expansion (not yet)
X * <num> select the <num>th space-separated field
X * ?name Set/unset truth value of "name"
X * {v} Separate v (any of above) from surrounding text
X * A variable name may include alphabetics, numbers, or underscores but
X * must begin with an alphabetic or underscore.
X */
Xvarexp(ref)
Xstruct expand *ref;
X{
X char *str = ref->orig, c, *p, *var, *end = NULL, *op = NULL;
X int do_bool, do_fmt = 0, expanded = 0;
X
X if (*str == '$') {
X /* Allow a $ all by itself to stand */
X if (!*++str || isspace(*str)) {
X ref->exp = savestr("$");
X ref->rest = str;
X return 1;
X }
X /* Handle $?{name} for backwards compatibility */
X if (do_bool = (*str == '?'))
X str++;
X if (*str == '{')
X if (p = index(str + 1, '}')) {
X var = str + 1;
X end = p;
X } else
X goto bad_var;
X else
X var = str;
X /* Handle $?name and ${?name} (normal cases) */
X if (*var == '?') {
X if (do_bool) /* backwards compatibility clash */
X goto bad_var;
X ++var, do_bool = 1;
X }
X switch (*var) {
X case '$':
X if (str[0] == '{' && str[2] != '}')
X goto bad_var;
X else {
X char buf[16];
X (void) sprintf(buf, "%d", getpid());
X ref->exp = savestr(buf);
X ref->rest = (end ? end : var) + 1;
X return 1;
X }
X when '%':
X for (p = var + 1; *p && !index(" \t\n;|\"'$", *p); p++)
X if (*p == ':') {
X if (!do_bool && !op) {
X op = p;
X do_fmt = p - var;
X } else
X break;
X }
X if (!do_fmt)
X do_fmt = p - var;
X end = p;
X when '[': case '(': /*)*/
X p = any(var, *var == '(' ? ") \t\n" : "] \t\n");
X if (!p || isspace(*p))
X goto bad_var;
X if (end && p > end)
X goto bad_var;
X else {
X var++;
X do_fmt = p - var;
X if (*++p == ':')
X op = p;
X else
X end = p;
X }
X /* fall through */
X default:
X if (!do_fmt && !isalpha(*var) && *var != '_')
X goto bad_var;
X if (!end)
X end = var + strlen(var);
X for (p = (op ? op : var + do_fmt) + 1; p < end; p++)
X if (!do_bool && !op && *p == ':') {
X op = p;
X } else if (!isalnum(*p) && *p != '_') {
X if (*str == '{') /*}*/
X goto bad_var;
X end = p;
X break;
X }
X if (op && op > end)
X op = NULL;
X }
X /* replace the end of "var" (end) with a nul,
X * and save char in `c'. Similarly chop at op.
X */
X c = *end, *end = 0;
X if (op)
X *op++ = 0;
X
X if (!do_fmt && debug > 3)
X printf("expanding (%s) ", var);
X
X /* get the value of the variable. */
X if (do_fmt) {
X char c1 = var[do_fmt];
X var[do_fmt] = 0;
X if (debug > 3)
X printf("expanding (%s) ", var);
X if (/*(*/ ')' == c1)
X p = format_prompt(current_msg, var);
X else
X p = format_hdr(current_msg, var, FALSE) + 9;
X var[do_fmt] = c1;
X } else if (!(p = check_internal(var)))
X p = do_set(set_options, var);
X if (do_bool) {
X ref->exp = savestr((p && (*p || !do_fmt)) ? "1" : "0");
X expanded = 1;
X if (debug > 3)
X printf("--> (%s)\n", p);
X } else if (p) {
X if (debug > 3)
X printf("--> (%s)", p);
X if (op && isdigit(*op)) {
X int varc, ix = atoi(op) - 1;
X char **varv = mk_argv(p, &varc, FALSE);
X /* Ignore non-fatal errors like unmatched quotes */
X if (varv && varc < 0)
X for (varc = 0; varv[varc]; varc++)
X ;
X if (ix < 0 || varc <= ix || !varv)
X ref->exp = savestr("");
X else
X ref->exp = savestr(varv[ix]);
X expanded = 1;
X free_vec(varv);
X } else if (op) {
X char *p2 = rindex(p, '/');
X expanded = (*op == 'h' || *op == 't');
X if (*op == 't' && p2)
X p = p2 + 1;
X else if (*op == 'h' && p2)
X *p2 = 0;
X ref->exp = savestr(p);
X if (*op == 'h' && p2)
X *p2 = '/';
X else if (*op == 'l' || *op == 'u') {
X expanded = 1;
X for (p = ref->exp; *p; p++)
X if (*op == 'u')
X Upper(*p);
X else
X Lower(*p);
X }
X if (!expanded) {
X print("Unknown colon modifier :%c.\n", *op);
X xfree(ref->exp);
X } else
X if (debug > 3)
X printf("--> (%s)\n", p);
X } else {
X ref->exp = savestr(p);
X expanded = 1;
X if (debug > 3)
X printf("\n");
X }
X } else {
X print("%s: undefined variable\n", var);
X expanded = 0;
X }
X *end = c; /* replace the null with the old character */
X if (op)
X *--op = ':'; /* Put back the colon */
X ref->rest = end + (*str == '{'); /* } */
X }
X return expanded;
Xbad_var:
X print("Illegal variable name.\n");
X return 0;
X}
X
X/*
X * find mush variable references and expand them to their values.
X * variables are preceded by a '$' and cannot be within single
X * quotes. Only if expansion has been made do we copy buf back into str.
X * We expand only as far as the first unprotected `;' separator in str,
X * to get the right behavior when multiple commands are on one line.
X * RETURN 0 on failure, 1 on success.
X */
Xvariable_expand(str)
Xregister char *str;
X{
X register int b = 0, inquotes = 0;
X char buf[BUFSIZ], *start = str;
X int expanded = 0;
X
X while (*str && b < sizeof buf - 1) {
X if (*str == '~' && (str == start || isspace(*(str-1)))) {
X register char *p = any(str, " \t"), *tmp;
X int x = 1;
X if (p)
X *p = 0;
X tmp = getpath(str, &x);
X /* if error, print message and return 0 */
X if (x == -1) {
X wprint("%s: %s\n", str, tmp);
X return 0;
X }
X b += Strcpy(buf+b, tmp);
X if (p)
X *p = ' ', str = p;
X else
X str += strlen(str);
X expanded = 1;
X }
X /* if single-quotes, just copy byte by byte, char by char ... */
X if ((buf[b] = *str++) == '\'' && !inquotes) {
X while ((buf[++b] = *str++) && buf[b] != '\'')
X ;
X if (!buf[b])
X str--;
X } else if (!inquotes && buf[b] == '\\' && *str) {
X buf[++b] = *str++;
X b++;
X continue;
X } else if (buf[b] == '"')
X inquotes = !inquotes;
X /* If $ is eol, continue. Variables must start with a `$'
X * and continue with {, _, a-z, A-Z or it is not a variable. }
X */
X if (buf[b] == '$' && *str) {
X struct expand expansion;
X expansion.orig = str - 1;
X if (varexp(&expansion)) {
X b += Strcpy(&buf[b], expansion.exp);
X xfree(expansion.exp);
X str = expansion.rest;
X expanded = 1;
X } else
X return 0;
X } else if (!inquotes && buf[b] == ';') {
X while (buf[++b] = *str++)
X ;
X b++;
X break;
X } else
X b++;
X }
X buf[b] = 0;
X if (expanded) /* if any expansions were done, copy back into orig buf */
X (void) strcpy(start, buf);
X if (debug > 3)
X printf("expanded to: %s\n", start);
X return 1;
X}
X
X/* make an argv of space delimited character strings out of string "str".
X * place in "argc" the number of args made. If final is true, then expand
X * variables and file names and remove quotes and backslants according to
X * standard.
X */
Xchar **
Xmk_argv(str, argc, final)
Xregister char *str;
Xint *argc;
X{
X register char *s = NULL, *p;
X register int tmp, err = 0, unq_sep = 0;
X char *newargv[MAXARGS], **argv, *p2, c, buf[BUFSIZ];
X
X if (debug > 3)
X (void) printf("Working on: %s\n",str);
X /* If final is true, do variable expansions first */
X if (final) {
X (void) strcpy(buf, str);
X str = buf;
X if (!variable_expand(str))
X return DUBL_NULL;
X }
X *argc = 0;
X while (*str && *argc < MAXARGS) {
X while (isspace(*str))
X ++str;
X /* When we have hit an unquoted `;', final must be true,
X * so we're finished. Stuff the rest of the string at the
X * end of the argv -- do_command will pass it back later,
X * for further processing -- and break out of the loop.
X * NOTE: *s is not yet valid the first time through this
X * loop, so unq_sep should always be initialized to 0.
X */
X if (unq_sep && s && *s == ';') {
X if (*str) { /* Don't bother saving a null string */
X newargv[*argc] = savestr(str);
X (*argc)++;
X }
X break;
X }
X if (*str) { /* found beginning of a word */
X unq_sep = 0; /* innocent until proven guilty */
X s = p = str;
X do {
X if (p - s >= sizeof buf-1) {
X print("argument list too long.\n");
X return DUBL_NULL;
X }
X if (*str == ';' || *str == '|')
X unq_sep = final; /* Mark an unquoted separator */
X if ((*p = *str++) == '\\') {
X if (final && (*str == ';' || *str == '|'))
X --p; /* Back up to overwrite the backslash */
X if (*++p = *str) /* assign and compare to NUL */
X str++;
X continue;
X }
X if (p2 = index("\"'", *p)) {
X register char c2 = *p2;
X /* you can't escape quotes inside quotes of the same type */
X if (!(p2 = index(str, c2))) {
X if (final)
X print("Unmatched %c.\n", c2);
X err++;
X p2 = str;
X }
X tmp = (int)(p2 - str) + 1; /* take up to & include quote */
X (void) strncpy(p + !final, str, tmp);
X p += tmp - 2 * !!final; /* change final to a boolean */
X if (*(str = p2))
X str++;
X }
X } while (++p, *str && (!isdelimeter(*str) || str[-1] == '\\'));
X if (c = *str) /* set c = *str, check for null */
X str++;
X *p = 0;
X if (*s) {
X /* To differentiate real separators from quoted or
X * escaped ones, always store 3 chars:
X * 1) The separator character
X * 2) A nul (string terminator)
X * 3) An additional boolean (0 or 1)
X * The boolean is checked by do_command. Note that this
X * applies only to "solitary" separators, i.e. those not
X * part of a larger word.
X */
X if (final && (!strcmp(s, ";") || !strcmp(s, "|"))) {
X char *sep = savestr("xx"); /* get 3 char slots */
X sep[0] = *s, sep[1] = '\0', sep[2] = unq_sep;
X newargv[*argc] = sep;
X } else
X newargv[*argc] = savestr(s);
X (*argc)++;
X }
X *p = c;
X }
X }
X if (!*argc)
X return DUBL_NULL;
X /* newargv[*argc] = NULL; */
X if (!(argv = (char **)calloc((unsigned)((*argc)+1), sizeof(char *)))) {
X perror("mk_argv: calloc");
X return DUBL_NULL;
X }
X for (tmp = 0; tmp < *argc; tmp++)
X argv[tmp] = newargv[tmp];
X if (err)
X *argc = -1;
X else if (debug > 3)
X (void) printf("Made argv: "), print_argv(argv);
X return argv;
X}
X
X/*
X * Report a history parsing error.
X * Suppress the message if nonobang is true.
X */
X#define hist_error if (nonobang) {;} else print
X
X/*
X * reference previous history from syntax of str and place result into buf
X * We know we've got a history reference -- we're passed the string starting
X * the first char AFTER the '!' (which indicates history reference)
X */
Xchar *
Xreference_hist(str, buf, hist_ref)
Xregister char *str, **hist_ref;
Xchar buf[];
X{
X int relative; /* relative from current hist_no */
X int old_hist, argstart = 0, lastarg, argend = 0, n = 0;
X register char *p, *rb = NULL, **argv = hist_ref;
X struct history *hist;
X
X buf[0] = 0;
X if (*str == '{')
X if (!(rb = index(str, '}'))) { /* { */
X hist_error("Unmatched '}'");
X return NULL;
X } else
X *rb = 0, ++str;
X relative = *str == '-';
X if (index("!:$*", *str)) {
X old_hist = hist_no;
X if (*str == '!')
X str++;
X } else if (isdigit(*(str + relative)))
X str = my_atoi(str + relative, &old_hist);
X else if (!(p = hist_from_str(str, &old_hist))) {
X if (rb) /* { */
X *rb = '}';
X return NULL;
X } else
X str = p;
X if (relative)
X old_hist = (hist_no - old_hist) + 1;
X if (old_hist == hist_no) {
X if (!(argv = hist_ref))
X hist_error("You haven't done anything yet!\n");
X } else {
X if (old_hist <= hist_no-hist_size || old_hist > hist_no ||
X old_hist <= 0) {
X if (old_hist <= 0)
X hist_error("You haven't done that many commands, yet.\n");
X else
X hist_error("Event %d %s.\n", old_hist,
X (old_hist > hist_no)? "hasn't happened yet": "expired");
X if (rb) /* { */
X *rb = '}';
X return NULL;
X }
X hist = hist_head;
X while (hist && hist->histno != old_hist)
X hist = hist->prev;
X if (hist)
X argv = hist->argv;
X }
X if (!argv) {
X if (rb) /* { */
X *rb = '}';
X return NULL;
X }
X while (argv[argend+1])
X argend++;
X lastarg = argend;
X if (*str && index(":$*-", *str)) {
X int isrange;
X if (*str == ':' && isdigit(*++str))
X str = my_atoi(str, &argstart);
X if (isrange = (*str == '-'))
X str++;
X if (!isdigit(*str)) {
X if (*str == 'p')
X str++, print_only = 1;
X else if (*str == '*') {
X str++;
X if (!isrange) {
X if (argv[0]) {
X if (argv[1])
X argstart = 1;
X else {
X if (rb) /* { */
X *rb = '}';
X return (rb ? rb + 1 : str);
X }
X } else
X argstart = 0;
X }
X } else if (*str == '$') {
X if (!isrange)
X argstart = argend;
X str++;
X } else if (isrange && argend > argstart)
X argend--; /* unspecified end of range implies last-1 arg */
X else
X argend = argstart; /* no range specified; use arg given */
X } else
X str = my_atoi(str, &argend);
X }
X if (argstart > lastarg || argend > lastarg || argstart > argend) {
X hist_error("Bad argument selector.\n");
X if (rb) /* { */
X *rb = '}';
X return (nonobang ? rb ? rb + 1 : str : NULL);
X }
X if (debug > 3)
X print("history expanding from "), print_argv(argv);
X while (argstart <= argend) {
X n += Strcpy(&buf[n], argv[argstart++]);
X buf[n++] = ' ';
X }
X buf[--n] = 0;
X if (rb) /* { */
X *rb = '}';
X return (rb ? rb + 1 : str);
X}
X
X/* find a history command that contains the string "str"
X * place that history number in "hist" and return the end of the string
X * parsed: !?foo (find command with "foo" in it) !?foo?bar (same, but add "bar")
X * in the second example, return the pointer to "bar"
X */
Xchar *
Xhist_from_str(str, hist_number)
Xregister char *str;
Xregister int *hist_number;
X{
X register char *p = NULL, c = 0;
X int full_search = 0, len, found;
X char buf[BUFSIZ];
X struct history *hist;
X#ifndef REGCMP
X extern char *re_comp();
X#else
X extern char *regcmp();
X#endif /* REGCMP */
X
X /* For !{something}, the {} are stripped in reference_hist() */
X if (*str == '?') {
X if (p = index(++str, '?'))
X c = *p, *p = 0;
X else
X p = str + strlen(str);
X full_search = 1;
X } else {
X p = str;
X while (*p && *p != ':' && !isspace(*p))
X p++;
X c = *p, *p = 0;
X }
X if (*str) {
X#ifndef REGCMP
X if (re_comp(str))
X#else
X if (!regcmp(str, NULL))
X#endif /* REGCMP */
X {
X if (c)
X *p = c;
X return NULL;
X }
X } else {
X *hist_number = hist_no;
X if (c)
X *p = c;
X return (*p == '?' ? p + 1 : p);
X }
X len = strlen(str);
X /* move thru the history in reverse searching for a string match. */
X for (hist = hist_head; hist; hist = hist->prev) {
X if (full_search) {
X (void) argv_to_string(buf, hist->argv);
X Debug("Checking for (%s) in (#%d: %s)\n", str, hist->histno, buf);
X }
X if (!full_search) {
X (void) strcpy(buf, hist->argv[0]);
X Debug("Checking for (%s) in (#%d: %*s)\n",
X str, hist->histno, len, buf);
X found = !strncmp(buf, str, len);
X } else
X found =
X#ifndef REGCMP
X re_exec(buf)
X#else
X !!regex(str, buf, NULL) /* convert to boolean value */
X#endif /* REGCMP */
X == 1;
X if (found) {
X *hist_number = hist->histno;
X Debug("Found it in history #%d\n", *hist_number);
X *p = c;
X return (*p == '?' ? p + 1 : p);
X }
X }
X hist_error("%s: event not found\n", str);
X *p = c;
X return NULL;
X}
X
Xdisp_hist(n, argv) /* argc not used -- use space for the variable, "n" */
Xregister int n;
Xchar **argv;
X{
X register int list_num = TRUE, num_of_hists = hist_size;
X register int reverse = FALSE;
X struct history *hist = hist_tail;
X
X while (*++argv && *argv[0] == '-') {
X n = 1;
X do switch(argv[0][n]) {
X case 'h': list_num = FALSE;
X when 'r': reverse = TRUE; hist = hist_head;
X otherwise: return help(0, "history", cmd_help);
X }
X while (argv[0][++n]);
X }
X
X if (!hist) {
X print("No history yet.\n");
X return -1;
X }
X if (*argv)
X if (!isdigit(**argv)) {
X print("history: badly formed number\n");
X return -1;
X } else
X num_of_hists = atoi(*argv);
X
X if (num_of_hists > hist_size || num_of_hists > hist_no)
X num_of_hists = min(hist_size, hist_no);
X
X if (!reverse)
X while (hist_no - hist->histno > num_of_hists) {
X (void) printf("skipping %d\n", hist->histno);
X hist = hist->next;
X }
X
X (void) do_pager(NULL, TRUE);
X for (n = 0; n < num_of_hists && hist; n++) {
X char buf[256];
X if (list_num)
X (void) do_pager(sprintf(buf, "%4.d ", hist->histno), FALSE);
X (void) argv_to_string(buf, hist->argv);
X (void) do_pager(buf, FALSE);
X if (do_pager("\n", FALSE) == -1)
X break;
X hist = (reverse)? hist->prev : hist->next;
X }
X (void) do_pager(NULL, FALSE);
X return 0;
X}
X
Xinit_history(newsize)
X{
X if ((hist_size = newsize) < 1)
X hist_size = 1;
X}
END_OF_FILE
if test 34930 -ne `wc -c <'mush/loop.c'`; then
echo shar: \"'mush/loop.c'\" unpacked with wrong size!
fi
# end of 'mush/loop.c'
fi
if test -f 'mush/pick.c' -a "${1}" != "-c" ; then
echo shar: Will not clobber existing file \"'mush/pick.c'\"
else
echo shar: Extracting \"'mush/pick.c'\" \(16964 characters\)
sed "s/^X//" >'mush/pick.c' <<'END_OF_FILE'
X/* @(#)pick.c 2.4 (c) copyright 10/18/86 (Dan Heller) */
X
X#include "mush.h"
X
Xstatic int before, after, search_from, search_subj, search_to, xflg, icase;
Xstatic char search_hdr[64];
Xstatic int mdy[3];
Xstatic int pick();
Xstatic void month_day_year();
X
Xdo_pick(n, argv, list)
Xregister int n;
Xregister char **argv, list[];
X{
X char ret_list[MAXMSGS_BITS];
X
X if (n > 1 && !strcmp(argv[1], "-?"))
X return help(0, "pick", cmd_help);
X
X clear_msg_list(ret_list);
X /* if is_pipe, then the messages to search for are already set.
X * if not piped, then reverse the bits for all message numbers.
X * That is, search EACH message. only those matching will be returned.
X */
X if (isoff(glob_flags, IS_PIPE))
X bitput(ret_list, list, msg_cnt, =~); /* macro, turn on all bits */
X /* Use n temporarily as verbosity flag */
X n = (!chk_option("quiet", "pick") &&
X isoff(glob_flags, DO_PIPE));
X if ((n = pick(argv, list, ret_list, n)) == -1)
X return -1;
X if (istool && isoff(glob_flags, DO_PIPE))
X print("%d matches:\n", n);
X for (n = 0; n < msg_cnt; n++)
X if (msg_bit(ret_list, n)) {
X if (isoff(glob_flags, DO_PIPE))
X if (istool)
X print_more("%d ", n+1);
X else
X print("%s\n", compose_hdr(n));
X set_msg_bit(list, n);
X } else
X unset_msg_bit(list, n);
X return 0;
X}
X
X/*
X * search for messages. Return the number of matches. Errors such
X * as internal errors or syntax errors, return -1.
X * "head" and "tail" are specified using +<num> or -<num> as args.
X * Both can be specified and the order is significant.
X * pick +5 -3
X * returns the last three of the first five matches.
X * pick -3 +2
X * returns the first two of the last three matches.
X */
Xstatic int
Xpick(argv, list, ret_list, verbose)
Xregister char **argv, list[], ret_list[];
X{
X register char c;
X int matches = 0;
X char pattern[256];
X short head_first, head_cnt, tail_cnt, search = TRUE;
X int n;
X
X if (!msg_cnt) {
X print("No Messages.\n");
X return -1;
X }
X
X head_first = TRUE;
X head_cnt = tail_cnt = -1;
X icase = before = after = search_from = search_subj = search_to = xflg = 0;
X mdy[0] = mdy[1] = search_hdr[0] = 0;
X while (*argv && *++argv && (**argv == '-' || **argv == '+'))
X if (**argv == '+' || isdigit(argv[0][1])) {
X if (**argv == '+')
X head_cnt = atoi(&argv[0][1]);
X else {
X tail_cnt = atoi(&argv[0][1]);
X if (head_cnt == -1)
X head_first = FALSE;
X }
X if (head_cnt == 0 || tail_cnt == 0) {
X print("pick: invalid head/tail number: %s\n", &argv[0][1]);
X clear_msg_list(ret_list);
X return -1;
X }
X } else if ((c = argv[0][1]) == 'e') {
X if (!*++argv) {
X print("use: -e expression...\n");
X return -1;
X }
X break;
X } else switch (c) {
X /* users specifies a range */
X case 'r': {
X int X = 2;
X /* if not a pipe, then clear all bits cuz we only want
X * to search the message specified here...
X * If it is a pipe, then add to the messages searched for.
X */
X if (isoff(glob_flags, IS_PIPE))
X clear_msg_list(list);
X /* "-r10-15"
X * ^argv[1][2] if NULL, then
X * list detached from "r" e.g. "-r" "5-20"
X */
X if (!argv[0][X])
X argv++, X = 0;
X (*argv) += X;
X n = get_msg_list(argv, list);
X (*argv) -= X;
X if (n == -1)
X return -1;
X argv += (n-1); /* we're going to increment another up top */
X }
X when 'a': {
X if ((n = ago_date(++argv)) == -1)
X return -1;
X argv += n;
X }
X when 'd':
X if (!*++argv) {
X print("Specify a date for -%c\n", c);
X return -1;
X }
X if (!date1(*argv))
X return -1;
X when 's' : case 'f': case 't': case 'h':
X if (search_subj + search_from + search_to + *search_hdr > 1) {
X print("Specify one of `s', `f', `t' or `h' only\n");
X return -1;
X }
X if (c == 's')
X search_subj = 1;
X else if (c == 'f')
X search_from = 1;
X else if (c == 'h')
X if (!*++argv)
X print("Specify header to search for.\n");
X else
X (void) lcase_strcpy(search_hdr, *argv);
X else
X search_to = 1;
X when 'x' : xflg = 1;
X when 'i' : icase = 1;
X otherwise:
X print("pick: unknown flag: %c\n", argv[0][1]);
X clear_msg_list(ret_list);
X return -1;
X }
X if (xflg && head_cnt + tail_cnt >= 0) {
X print("Can't specify -x and head/tail options together.\n");
X return -1;
X }
X pattern[0] = 0;
X (void) argv_to_string(pattern, argv);
X search = (pattern[0] || head_cnt + tail_cnt < 0);
X if (verbose) {
X if (head_cnt + tail_cnt >= 0) {
X print("Finding the ");
X if (head_cnt > 0) {
X if (head_first)
X if (tail_cnt == -1)
X print_more("first %d message%s",
X head_cnt, head_cnt > 1? "s" : "");
X else
X print_more("last %d message%s",
X tail_cnt, tail_cnt > 1? "s" : "");
X else /* there must be a tail_cnt and it comes first */
X print_more("first %d message%s",
X head_cnt, head_cnt > 1? "s" : "");
X } else
X print_more("last %d message%s",
X tail_cnt, tail_cnt > 1? "s" : "");
X if (tail_cnt > 0 && head_cnt > 0)
X if (head_first)
X print_more(" of the first %d", head_cnt);
X else
X print_more(" of the last %d", tail_cnt);
X } else
X print_more("Searching for messages");
X if (!search) {
X if (tail_cnt > 0 && head_cnt > 0)
X print_more(" messages");
X if (ison(glob_flags, IS_PIPE))
X print_more(" from the input list");
X } else if (mdy[1] == 0) {
X print(" that %scontain \"%s\"", (xflg)? "do not ": "",
X (*pattern)? pattern: "<previous expression>");
X if (search_subj)
X print_more(" in subject line");
X else if (search_from)
X print_more(" from author names");
X else if (search_to)
X print_more(" from the To: field");
X else if (search_hdr[0])
X print_more(" from the message header \"%s:\"", search_hdr);
X } else {
X extern char *month_names[]; /* from dates.c */
X print_more(" dated ");
X if (before || after)
X if (xflg)
X print_more("%s ", (!before)? "before": "after");
X else
X print_more("on or %s ", (before)? "before": "after");
X print_more("%s. %d, %d",
X month_names[mdy[0]], mdy[1], mdy[2] + 1900);
X }
X print_more(".\n");
X }
X if (mdy[1] > 0 && icase)
X print("using date: -i flag ignored.\n");
X if (!search) {
X for (n = 0; n < msg_cnt && (!head_first || matches < head_cnt); n++)
X if (msg_bit(list, n))
X ++matches, set_msg_bit(ret_list, n);
X } else
X matches = find_pattern(head_first? head_cnt : msg_cnt,
X pattern, list, ret_list);
X if (xflg && matches >= 0) {
X /* invert items in ret_list that also appear in list */
X bitput(list, ret_list, msg_cnt, ^=);
X /* there should be a faster way to do this count ... */
X for (matches = n = 0; n < msg_cnt; n++)
X if (msg_bit(ret_list, n))
X ++matches;
X }
X Debug("matches = %d\n", matches);
X if (!matches)
X return 0;
X
X /* ok, the list we've got is a list of matched messages. If "tailing"
X * is set, reduce the number of matches to at least tail_cnt.
X */
X if (tail_cnt >= 0)
X for (n = 0; n < msg_cnt && matches > tail_cnt; n++)
X if (msg_bit(ret_list, n)) {
X Debug("tail: dropping %d\n", n+1);
X unset_msg_bit(ret_list, n);
X matches--;
X }
X
X /* if tailing came before heading, we need to do the heading now. */
X if (!head_first && head_cnt >= 0)
X for (n = 0; n < msg_cnt; n++)
X if (msg_bit(ret_list, n))
X if (head_cnt > 0)
X head_cnt--;
X else {
X unset_msg_bit(ret_list, n);
X matches--;
X }
X return matches;
X}
X
X/*
X * find_pattern will search thru all the messages set in the check_list
X * until the list runs out or "cnt" has been exhasted. ret_list contains
X * the list of messages which have matched the pattern.
X * return -1 for internal error or # of pattern matches.
X */
Xfind_pattern(cnt, p, check_list, ret_list)
Xint cnt;
Xregister char *p;
Xchar check_list[], ret_list[];
X{
X register int n, val, i; /* val is return value from regex or re_exec */
X int matches = 0;
X long bytes = 0;
X char buf[HDRSIZ];
X static char *err = (char *)-1;
X#ifdef REGCMP
X char *regcmp(), *regex();
X#else /* REGCMP */
X char *re_comp();
X#endif /* REGCMP */
X
X if (p && *p == '\\')
X p++; /* take care of escaping special cases (`-', `\') */
X
X /* specify what we're looking for */
X if (p && *p) {
X if (icase)
X p = lcase_strcpy(buf, p);
X#ifdef REGCMP
X if (err && p)
X xfree(err);
X if (p && !(err = regcmp(p, NULL))) {
X print("regcmp error: %s\n", p);
X clear_msg_list(ret_list);
X return -1;
X }
X#else /* REGCMP */
X if (err = re_comp(p)) {
X print("re_comp error: %s\n", err);
X clear_msg_list(ret_list);
X return -1;
X }
X#endif /* REGCMP */
X } else if (err == (char *)-1 && mdy[1] <= 0) {
X print("No previous regular expression\n");
X clear_msg_list(ret_list); /* doesn't matter really */
X return -1;
X }
X /* start searching: set bytes, and message number: n */
X for (n = 0; cnt && n < msg_cnt; n++)
X if (msg_bit(check_list, n)) {
X if (mdy[1] > 0) {
X int msg_mdy[3];
X if (ison(glob_flags, DATE_RECV))
X p = msg[n].m_date_recv;
X else
X p = msg[n].m_date_sent;
X /* Ick -- fix this mdy thing asap */
X month_day_year(p, &msg_mdy[0], &msg_mdy[1], &msg_mdy[2]);
X Debug("checking %d's date: %d-%d-%d ",
X n+1, msg_mdy[0]+1, msg_mdy[1], msg_mdy[2]);
X /* start at year and wrap around.
X * only when match the day (4), check for == (match)
X */
X for (i = 2; i < 5; i++)
X if (before && msg_mdy[i%3] < mdy[i%3]
X || after && msg_mdy[i%3] > mdy[i%3]
X || i == 4 && (msg_mdy[i%3] == mdy[i%3])) {
X Debug("matched (%s).\n",
X (i == 2)? "year" : (i == 3)? "month" : "day");
X set_msg_bit(ret_list, n);
X cnt--, matches++;
X break;
X } else if (msg_mdy[i%3] != mdy[i%3]) {
X Debug("failed.\n");
X break;
X }
X continue;
X }
X /* we must have the right date -- if we're searching for a
X * string, find it.
X */
X (void) msg_get(n, NULL, 0);
X bytes = 0;
X while (bytes < msg[n].m_size) {
X if (!search_subj && !search_from && !search_to &&
X !*search_hdr && !(p = fgets(buf, sizeof buf, tmpf)))
X break;
X else if (search_subj) {
X if (!(p = header_field(n, "subject")))
X break;
X } else if (search_from) {
X if (!(p = header_field(n, "from"))) {
X /*
X * Check for MSG_SEPARATOR here? Maybe not...
X */
X register char *p2;
X (void) msg_get(n, NULL, 0);
X if (!(p2 = fgets(buf, sizeof buf, tmpf)) ||
X !(p = index(p2, ' ')))
X continue;
X p++;
X if (p2 = any(p, " \t"))
X *p2 = 0;
X }
X } else if (search_to) {
X if (!(p = header_field(n, "to")) &&
X !(p = header_field(n, "apparently-to")))
X break;
X } else if (*search_hdr) {
X if (!(p = header_field(n, search_hdr)))
X break;
X }
X if (icase)
X p = lcase_strcpy(buf, p);
X#ifdef REGCMP
X val = !!regex(err, p, NULL); /* convert value to a boolean */
X#else /* REGCMP */
X val = re_exec(p);
X#endif /* REGCMP */
X if (val == -1) { /* doesn't apply in system V */
X print("Internal error for pattern search.\n");
X clear_msg_list(ret_list); /* it doesn't matter, really */
X return -1;
X }
X if (val) {
X set_msg_bit(ret_list, n);
X cnt--, matches++;
X break;
X }
X if (search_subj || search_from || search_to || *search_hdr)
X break;
X else
X bytes += strlen(p);
X }
X }
X return matches;
X}
X
X#ifdef CURSES
X/*
X * search for a pattern in composed message headers -- also see next function
X * flags == 0 forward search (prompt).
X * flags == -1 continue search (no prompt).
X * flags == 1 backward search (prompt).
X */
Xsearch(flags)
Xregister int flags;
X{
X register char *p;
X char pattern[128];
X register int this_msg = current_msg, val = 0;
X static char *err = (char *)-1, direction;
X SIGRET (*oldint)(), (*oldquit)();
X#ifdef REGCMP
X char *regcmp();
X#else /* REGCMP */
X char *re_comp();
X#endif /* REGCMP */
X
X if (msg_cnt <= 1) {
X print("Not enough messages to invoke a search.\n");
X return 0;
X }
X pattern[0] = '\0';
X if (flags == -1)
X print("continue %s search...", direction? "forward" : "backward");
X else
X print("%s search: ", flags? "backward" : "forward");
X if (flags > -1)
X if (Getstr(pattern, COLS-18, 0) < 0)
X return 0;
X else
X direction = !flags;
X#ifdef REGCMP
X if (err && *pattern)
X xfree(err);
X else if (err == (char *)-1 && !*pattern) {
X print("No previous regular expression.");
X return 0;
X }
X if (*pattern && !(err = regcmp(pattern, NULL))) {
X print("Error in regcmp in %s", pattern);
X return 0;
X }
X#else /* REGCMP */
X if (err = re_comp(pattern)) {
X print(err);
X return 0;
X }
X#endif /* REGCMP */
X move(LINES-1, 0), refresh();
X on_intr();
X
X do {
X if (direction)
X current_msg = (current_msg+1) % msg_cnt;
X else
X if (--current_msg < 0)
X current_msg = msg_cnt-1;
X p = compose_hdr(current_msg);
X#ifdef REGCMP
X val = !!regex(err, p, NULL); /* convert value to a boolean */
X#else /* REGCMP */
X val = re_exec(p);
X#endif /* REGCMP */
X if (val == -1) /* doesn't apply in system V */
X print("Internal error for pattern search.\n");
X } while (!val && current_msg != this_msg && isoff(glob_flags, WAS_INTR));
X
X if (ison(glob_flags, WAS_INTR)) {
X print("Pattern search interrupted.");
X current_msg = this_msg;
X } else if (val == 0)
X print("Pattern not found.");
X
X off_intr();
X return val;
X}
X#endif /* CURSES */
X
X/*
X * Get just the month, day, and year from a date.
X * This is a temporary measure until the date compares in pick()
X * can be overhauled. It really should be in dates.c, but ...
X */
Xstatic
Xvoid
Xmonth_day_year(date, month, day, year)
Xchar *date;
Xint *month, *day, *year;
X{
X long gmt;
X char unused[4], zone[8];
X struct tm *t;
X extern long getzoff();
X
X (void) sscanf(date, "%ld%3c%s", &gmt, unused, zone);
X gmt += getzoff(zone);
X t = gmtime(&gmt);
X *month = t->tm_mon;
X *day = t->tm_mday;
X *year = t->tm_year;
X}
X
X/*
X * parse a user given date string and set mdy[] array with correct
X * values. Return 0 on failure.
X */
Xdate1(p)
Xregister char *p;
X{
X register char *p2;
X long t;
X int i;
X struct tm *today;
X
X if (*p == '-' || *p == '+') {
X before = !(after = *p == '+');
X skipspaces(1);
X }
X if (!isdigit(*p) && *p != '/') {
X print("syntax error on date: \"%s\"\n", p);
X return 0;
X }
X (void) time (&t);
X today = localtime(&t);
X for (i = 0; i < 3; i++)
X if (!p || !*p || *p == '/') {
X switch(i) { /* default to today's date */
X case 0: mdy[0] = today->tm_mon;
X when 1: mdy[1] = today->tm_mday;
X when 2: mdy[2] = today->tm_year;
X }
X if (p && *p)
X p++;
X } else {
X p2 = (*p)? index(p+1, '/') : NULL;
X mdy[i] = atoi(p); /* atoi will stop at the '/' */
X if (i == 0 && (--(mdy[0]) < 0 || mdy[0] > 11)) {
X print("Invalid month: %s\n", p);
X return 0;
X } else if (i == 1 && (mdy[1] < 1 || mdy[1] > 31)) {
X print("Invalid day: %s\n", p);
X return 0;
X }
X if (p = p2) /* set p to p2 and check to see if it's valid */
X p++;
X }
X return 1;
X}
X
X/*
X * Parse arguments specifying days/months/years "ago" (relative to today).
X * Legal syntax: -ago [+-][args]
X * where "args" is defined to be:
X * [0-9]+[ ]*[dD][a-Z]*[ ,]*[0-9]+[mM][a-Z]*[ ,]*[0-9]+[ ]*[yY][a-Z]*
X * 1 or more digits, 0 or more spaces, d or D followed by 0 or more chars,
X * 0 or more whitespaces or commas, repeat for months and years...
X * Examples:
X * 1 day, 2 months, 0 years
X * 2 weeks 1 year
X * 10d, 5m
X * 3w
X * 1d 1Y
X *
X * Return number of args parsed; -1 on error.
X */
Xago_date(argv)
Xchar **argv;
X{
X#define SECS_PER_DAY (60 * 60 * 24)
X#define SECS_PER_WEEK (SECS_PER_DAY * 7)
X#define SECS_PER_MONTH ((int)(SECS_PER_DAY * 30.5))
X#define SECS_PER_YEAR (SECS_PER_DAY * 365)
X register char *p;
X char buf[256];
X int n = 0, value;
X long t;
X struct tm *today;
X
X (void) argv_to_string(buf, argv);
X p = buf;
X (void) time (&t); /* get current time in seconds and subtract new values */
X if (*p == '-')
X before = TRUE;
X else if (*p == '+')
X after = TRUE;
X skipspaces(before || after);
X while (*p) {
X if (!isdigit(*p)) {
X p -= 2;
X break; /* really a syntax error, but it could be other pick args */
X }
X p = my_atoi(p, &value); /* get 1 or more digits */
X skipspaces(0); /* 0 or more spaces */
X switch (lower(*p)) { /* d, m, or y */
X case 'd' : t -= value * SECS_PER_DAY;
X when 'w' : t -= value * SECS_PER_WEEK;
X when 'm' : t -= value * SECS_PER_MONTH;
X when 'y' : t -= value * SECS_PER_YEAR;
X otherwise: return -1;
X }
X for (p++; Lower(*p) >= 'a' && *p <= 'z'; p++)
X ; /* skip the rest of this token */
X while (*p == ',' || isspace(*p))
X ++p; /* 0 or more whitespaces or commas */
X }
X today = localtime(&t);
X mdy[0] = today->tm_mon;
X mdy[1] = today->tm_mday;
X mdy[2] = today->tm_year;
X
X /* Count the number of args parsed */
X for (n = 0; p > buf && *argv; n++)
X p -= (strlen(*argv++)+1);
X Debug("parsed %d args\n", n);
X return n;
X}
END_OF_FILE
if test 16964 -ne `wc -c <'mush/pick.c'`; then
echo shar: \"'mush/pick.c'\" unpacked with wrong size!
fi
# end of 'mush/pick.c'
fi
echo shar: End of archive 5 \(of 19\).
cp /dev/null ark5isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 ; do
if test ! -f ark${I}isdone ; then
MISSING="${MISSING} ${I}"
fi
done
if test "${MISSING}" = "" ; then
echo You have unpacked all 19 archives.
rm -f ark[1-9]isdone ark[1-9][0-9]isdone
else
echo You still need to unpack the following archives:
echo " " ${MISSING}
fi
## End of shell archive.
exit 0