Usenet 1994 January/usenetsourcesnewsgroupsinfomagicjanuary1994.iso/sources/unix/volume6/elm/part13

Internet Message Format | 1986-11-30 | 58.6 KB

Subject: v06i038:  Elm mail system (elm), Part13/14
Newsgroups: mod.sources
Approved: [e-mail]

Submitted by: Dave Taylor <pyramid!hplabs!hpldat!taylor>
Mod.sources: Volume 6, Issue 38
Archive-name: elm/Part13

# Continuation of Shell Archive, created by hpldat!taylor

# This is part 13

# To unpack the enclosed files, please use this file as input to the
# Bourne (sh) shell.  This can be most easily done by the command;
#     sh < thisfilename


if [ ! -d utils ]
then
  echo creating directory utils
  mkdir utils
fi

# ---------- file utils/arepdaemon.c ----------

filename="utils/arepdaemon.c"

if [ -f $filename ]
then
  echo File \"$filename\" already exists\!  Skipping...
  filename=/dev/null        # throw it away
else
  echo extracting file utils/arepdaemon.c...
fi

cat << 'END-OF-FILE' > $filename
/**            arepdaemon.c            **/

/** (C) Copyright 1986 Dave Taylor            **/

/** Keep track of mail as it arrives, and respond by sending a 'recording'
    file to the sender as new mail is received.

    Note: the user program that interacts with this program is the
    'autoreply' program and that should be consulted for further
    usage information.

    This program is part of the 'autoreply' system, and is designed
    to run every hour and check all mailboxes listed in the file
    "/etc/autoreply.data", where the data is in the form:

    username    replyfile    current-mailfile-size

    To avoid a flood of autoreplies, this program will NOT reply to mail
    that contains header "X-Mailer: fastmail".  Further, each time the
    program responds to mail, the 'mailfile size' entry is updated in
    the file /etc/autoreply.data to allow the system to be brought
    down and rebooted without any loss of data or duplicate messages.

    This daemon also uses a lock semaphore file, /usr/spool/uucp/LCK..arep,
    to ensure that more than one copy of itself is never running.  For this
    reason, it is recommended that this daemon be started up each morning
    from cron, since it will either start since it's needed or simply see
    that the file is there and disappear.

    Since this particular program is the main daemon answering any
    number of different users, it must be run with uid root.

    (C) 1985, Dave Taylor, HP Colorado Networks Operation
**/

#include <stdio.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "defs.h"

static char ident[] = { WHAT_STRING };

#define arep_lock_file    "/usr/spool/uucp/LCK..arep"

#define autoreply_file    "/etc/autoreply.data"
#define fastmail    "/usr/local/bin/fastmail"

#define logfile        "/etc/autoreply.log"    /* first choice   */
#define logfile2    "/tmp/autoreply.log"    /* second choice  */

#define BEGINNING    0        /* see fseek(3S) for info */
#define SLEEP_TIME    3600        /* run once an hour       */
#define MAX_PEOPLE    20        /* max number in program  */

#define EXISTS        00        /* lock file exists??     */
#define MODE        0777        /* lockfile creation mode */

#define NLEN        20

#define remove_return(s)    if (strlen(s) > 0) { \
                      if (s[strlen(s)-1] == '\n') \
                    s[strlen(s)-1] = '\0'; \
                        }

struct replyrec {
    char     username[NLEN];        /* login name of user */
    char    mailfile[SLEN];        /* name of mail file  */
    char    replyfile[SLEN];    /* name of reply file */
    long    mailsize;        /* mail file size     */
    int     in_list;        /* for new replies    */
      } reply_table[MAX_PEOPLE];

FILE  *logfd;                /* logfile (log action)   */
long  autoreply_size = 0L;        /* size of autoreply file */
int   active = 0;            /* # of people 'enrolled' */

FILE  *open_logfile();            /* forward declaration    */

long  bytes();                /*       ditto           */

main()
{
    long size;
    int  person, data_changed;

    if (! lock())
      exit(0);    /* already running! */

    while (1) {

      logfd = open_logfile();    /* open the log */

      /* 1. check to see if autoreply table has changed.. */

      if ((size = bytes(autoreply_file)) != autoreply_size) {
        read_autoreply_file();
        autoreply_size = size;
      }

      /* 2. now for each active person... */

      data_changed = 0;

      for (person = 0; person < active; person++) {
        if ((size = bytes(reply_table[person].mailfile)) !=
        reply_table[person].mailsize) {
          if (size > reply_table[person].mailsize)
            read_newmail(person);
          /* else mail removed - resync */
          reply_table[person].mailsize = size;
          data_changed++;
        }
      }

      /* 3. if data changed, update autoreply file */

      if (data_changed)
        update_autoreply_file();

      close_logfile();        /* close the logfile again */

      /* 4. Go to sleep...  */

      sleep(SLEEP_TIME);
    }
}

int
read_autoreply_file()
{
    /** We're here because the autoreply file has changed size!!  It
        could either be because someone has been added or because
        someone has been removed...since the list will always be in
        order (nice, eh?) we should have a pretty easy time of it...
    **/

    FILE *file;
    char username[SLEN],     replyfile[SLEN];
    int  person;
     long size;

    log("Autoreply data file has changed!  Reading...");

    if ((file = fopen(autoreply_file,"r")) == NULL) {
      log("No-one is using autoreply...");
      return(0);
    }

    for (person = 0; person < active; person++)
      reply_table[person].in_list = 0;

    while (fscanf(file, "%s %s %dl", username, replyfile, &size) != EOF) {
      /* check to see if this person is already in the list */
      if ((person = in_list(username)) != -1) {
        reply_table[person].in_list = 1;
        reply_table[person].mailsize = size;     /* sync */
      }
      else {     /* if not, add them */
        if (active == MAX_PEOPLE) {
          unlock();
          exit(log("Couldn't add %s - already at max people!",
                 username));
        }
        log("adding %s to the active list", username);
        strcpy(reply_table[active].username, username);
        sprintf(reply_table[active].mailfile, "/usr/mail/%s", username);
        strcpy(reply_table[active].replyfile, replyfile);
        reply_table[active].mailsize = size;
        reply_table[active].in_list = 1;    /* obviously! */
        active++;
      }
    }

    /** now check to see if anyone has been removed... **/

    for (person = 0; person < active; person++)
      if (reply_table[person].in_list == 0) {
         log("removing %s from the active list",
          reply_table[person].username);
        strcpy(reply_table[person].username,
           reply_table[active-1].username);
        strcpy(reply_table[person].mailfile,
           reply_table[active-1].mailfile);
        strcpy(reply_table[person].replyfile,
           reply_table[active-1].replyfile);
        reply_table[person].mailsize = reply_table[active-1].mailsize;
        active--;
      }
}

update_autoreply_file()
{
    /** update the entries in the autoreply file... **/

    FILE *file;
    register int person;

    if ((file = fopen(autoreply_file,"w")) == NULL) {
          log("Couldn't update autoreply file!");
      return;
    }

    for (person = 0; person < active; person++)
      fprintf(file, "%s %s %ld\n",
          reply_table[person].username,
          reply_table[person].replyfile,
          reply_table[person].mailsize);

    fclose(file);

    printf("updated autoreply file\n");
    autoreply_size = bytes(autoreply_file);
}

int
in_list(name)
char *name;
{
    /** search the current active reply list for the specified username.
        return the index if found, or '-1' if not. **/

    register int index;

    for (index = 0; index < active; index++)
      if (strcmp(name, reply_table[index].username) == 0)
        return(index);

    return(-1);
}

read_newmail(person)
int person;
{
    /** Read the new mail for the specified person. **/


    FILE *mailfile;
    char from_whom[LONG_SLEN], subject[SLEN];
    int  sendit;

    log("New mail for %s", reply_table[person].username);

        if ((mailfile = fopen(reply_table[person].mailfile,"r")) == NULL)
           return(log("can't open mailfile for user %s",
            reply_table[person].username));

        if (fseek(mailfile, reply_table[person].mailsize, BEGINNING) == -1)
           return(log("couldn't seek to %ld in mail file!",
                   reply_table[person].mailsize));

    while (get_return(mailfile, person, from_whom, subject, &sendit) != -1)
      if (sendit)
        reply_to_mail(person, from_whom, subject);

    return;
}

int
get_return(file, person, from, subject, sendit)
FILE *file;
int  person, *sendit;
char *from, *subject;
{
    /** Reads the new message and return the from and subject lines.
        sendit is set to true iff it isn't a machine generated msg
    **/

    char name1[SLEN], name2[SLEN], lastname[SLEN];
    char buffer[LONG_SLEN], hold_return[NLEN];
    int done = 0, in_header = 0;

    from[0] = '\0';
    *sendit = 1;

    while (! done) {

      if (fgets(buffer, LONG_SLEN, file) == NULL)
    return(-1);

      if (first_word(buffer, "From ")) {
    in_header++;
    sscanf(buffer, "%*s %s", hold_return);
      }
      else if (in_header) {
        if (first_word(buffer, ">From")) {
      sscanf(buffer,"%*s %s %*s %*s %*s %*s %*s %*s %*s %s", name1, name2);
      add_site(from, name2, lastname);
        }
        else if (first_word(buffer,"Subject:")) {
      remove_return(buffer);
      strcpy(subject, (char *) (buffer + 8));
        }
        else if (first_word(buffer,"X-Mailer: fastmail"))
      *sendit = 0;
        else if (strlen(buffer) == 1)
      done = 1;
      }
    }

    if (from[0] == '\0')
      strcpy(from, hold_return); /* default address! */
    else
      add_site(from, name1, lastname);    /* get the user name too! */

    return(0);
}

add_site(buffer, site, lastsite)
char *buffer, *site, *lastsite;
{
    /** add site to buffer, unless site is 'uucp', or the same as
        lastsite.   If not, set lastsite to site.
    **/

    char local_buffer[LONG_SLEN], *strip_parens();

    if (strcmp(site, "uucp") != 0)
      if (strcmp(site, lastsite) != 0) {
          if (buffer[0] == '\0')
            strcpy(buffer, strip_parens(site));         /* first in list! */
          else {
            sprintf(local_buffer,"%s!%s", buffer, strip_parens(site));
            strcpy(buffer, local_buffer);
          }
          strcpy(lastsite, strip_parens(site)); /* don't want THIS twice! */
       }
}

remove_first_word(string)
char *string;
{    /** removes first word of string, ie up to first non-white space
        following a white space! **/

    register int loc;

    for (loc = 0; string[loc] != ' ' && string[loc] != '\0'; loc++)
        ;

    while (string[loc] == ' ' || string[loc] == '\t')
      loc++;

    move_left(string, loc);
}

move_left(string, chars)
char string[];
int  chars;
{
    /** moves string chars characters to the left DESTRUCTIVELY **/

    register int i;

    chars--; /* index starting at zero! */

    for (i=chars; string[i] != '\0' && string[i] != '\n'; i++)
      string[i-chars] = string[i];

    string[i-chars] = '\0';
}

reply_to_mail(person, from, subject)
int   person;
char *from, *subject;
{
    /** Respond to the message from the specified person with the
        specified subject... **/

    char buffer[SLEN];

    if (strlen(subject) == 0)
      strcpy(subject, "Auto-reply Mail");
    else if (! first_word(subject,"Auto-reply")) {
      sprintf(buffer, "Auto-reply to:%s", subject);
      strcpy(subject, buffer);
    }

    log("auto-replying to '%s'", from);

    mail(from, subject, reply_table[person].replyfile, person);
}

reverse(string)
char *string;
{
    /** reverse string... pretty trivial routine, actually! **/

    char buffer[SLEN];
    register int i, j = 0;

    for (i = strlen(string)-1; i >= 0; i--)
      buffer[j++] = string[i];

    buffer[j] = '\0';

    strcpy(string, buffer);
}

long
bytes(name)
char *name;
{
    /** return the number of bytes in the specified file.  This
        is to check to see if new mail has arrived....  **/

    int ok = 1;
    extern int errno;    /* system error number! */
    struct stat buffer;

    if (stat(name, &buffer) != 0)
      if (errno != 2) {
       unlock();
       exit(fprintf(stderr,"Error %d attempting fstat on %s", errno, name));
      }
      else
        ok = 0;

    return(ok ? buffer.st_size : 0);
}

mail(to, subject, filename, person)
char *to, *subject, *filename;
int   person;
{
    /** Mail 'file' to the user from person... **/

    char buffer[VERY_LONG_STRING];

    sprintf(buffer, "%s -f '%s [autoreply]' -s '%s' %s %s",
        fastmail, reply_table[person].username,
            subject, filename, to);

    system(buffer);
}

log(message, arg)
char *message;
char *arg;
{
    /** Put log entry into log file.  Use the format:
          date-time: <message>
    **/

    struct tm *localtime(), *thetime;
    long      time(), clock;
    char      buffer[SLEN];

    /** first off, get the time and date **/

    clock = time((long *) 0);       /* seconds since ???   */
    thetime = localtime(&clock);    /* and NOW the time... */

    /** then put the message out! **/

    sprintf(buffer, message, arg);

    fprintf(logfd,"%d/%d-%d:%02d: %s\n",
        thetime->tm_mon+1, thetime->tm_mday,
            thetime->tm_hour,  thetime->tm_min,
            buffer);
}

FILE *open_logfile()
{
    /** open the logfile.  returns a valid file descriptor **/

    FILE *fd;

    if ((fd = fopen(logfile, "a")) == 0)
      if ((fd = fopen(logfile2, "a")) == 0) {
        unlock();
        exit(1);    /* give up! */
      }

    return( (FILE *) fd);
}

close_logfile()
{
    /** Close the logfile until needed again. **/

    fclose(logfd);
}

char *strip_parens(string)
char *string;
{
    /** Return string with all parenthesized information removed.
        This is a non-destructive algorithm... **/

    static char  buffer[LONG_SLEN];
    register int i, depth = 0, buffer_index = 0;

    for (i=0; i < strlen(string); i++) {
      if (string[i] == '(')
        depth++;
      else if (string[i] == ')')
        depth--;
      else if (depth == 0)
        buffer[buffer_index++] = string[i];
    }

    buffer[buffer_index] = '\0';

    return( (char *) buffer);
}

/*** LOCK and UNLOCK - ensure only one copy of this daemon running at any
     given time by using a file existance semaphore (wonderful stuff!) ***/

lock()
{
    /** Try to create the lock file.  If it's there, or we can't
        create it for some stupid reason, return zero, otherwise,
        a non-zero return code indicates success in locking this
        process in. **/

    if (access(arep_lock_file, EXISTS) == 0)
      return(0);     /* file already exists!! */

    if (creat(arep_lock_file, MODE) == -1)
      return(0);    /* can't create file!!   */

    return(1);
}

unlock()
{
    /** remove lock file if it's there! **/

    (void) unlink(arep_lock_file);
}
END-OF-FILE

if [ "$filename" != "/dev/null" ]
then
  size=`wc -c < $filename`

  if [ $size != 13380 ]
  then
    echo $filename changed - should be 13380 bytes, not $size bytes
  fi

  chmod 666 $filename
fi

# ---------- file utils/autoreply.c ----------

filename="utils/autoreply.c"

if [ -f $filename ]
then
  echo File \"$filename\" already exists\!  Skipping...
  filename=/dev/null        # throw it away
else
  echo extracting file utils/autoreply.c...
fi

cat << 'END-OF-FILE' > $filename
/**            autoreply.c            **/

/** This is the front-end for the autoreply system, and performs two
    functions: it either adds the user to the list of people using the
    autoreply function (starting the daemon if no-one else) or removes
    a user from the list of people.

    Usage:  autoreply filename
        autoreply "off"
    or  autoreply        [to find current status]

    (C) 1986, Dave Taylor
**/

#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "defs.h"

static char ident[] = { WHAT_STRING };

#define  READ_ACCESS    04               /* is file readable?    */

#define  tempdir    "/tmp/arep"        /* file prefix          */
#define  autoreply_file    "/etc/autoreply.data"   /* autoreply data file  */

extern   int errno;                /* system error code    */
char     username[NLEN];            /* login name of user   */

main(argc, argv)
int    argc;
char *argv[];
{
    char filename[SLEN];

    if (argc > 2) {
      printf("Usage: %s <filename>\tto start autoreply,\n", argv[0]);
      printf("       %s off\t\tto turn off autoreply\n", argv[0]);
      printf("   or  %s    \t\tto check current status\n", argv[0]);
      exit(1);
    }

    (void) cuserid(username);

    if (argc == 1 || strcmp(argv[1], "off") == 0)
      remove_user((argc == 1));
    else {
      strcpy(filename, argv[1]);
      if (access(filename,READ_ACCESS) != 0) {
        printf("Error: Can't read file '%s'\n", filename);
        exit(1);
      }

      if (filename[0] != '/') /* prefix home directory */
        sprintf(filename,"%s/%s", getenv("HOME"), argv[1]);

      add_user(filename);
    }

    exit(0);
}

remove_user(stat_only)
int stat_only;
{
    /** Remove the user from the list of currently active autoreply
        people.  If 'stat_only' is set, then just list the name of
        the file being used to autoreply with, if any. **/

    FILE *temp, *repfile;
    char  tempfile[SLEN], user[SLEN], filename[SLEN];
    int   c, copied = 0, found = 0;
    long  filesize, bytes();

    if (! stat_only) {
      sprintf(tempfile, "%s.%06d", tempdir, getpid());

      if ((temp = fopen(tempfile, "w")) == NULL) {
        printf("Error: couldn't open tempfile '%s'.  Not removed\n",
            tempfile);
        exit(1);
      }
    }

    if ((repfile = fopen(autoreply_file, "r")) == NULL) {
      if (stat_only) {
        printf("You're not currently autoreplying to mail.\n");
        exit(0);
      }
      printf("No-one is autoreplying to their mail!\n");
      exit(0);
    }

    /** copy out of real replyfile... **/

    while (fscanf(repfile, "%s %s %ld", user, filename, &filesize) != EOF)

      if (strcmp(user, username) != 0) {
        if (! stat_only) {
          copied++;
          fprintf(tempfile, "%s %s %ld\n", user, filename, filesize);
        }
      }
      else {
        if (stat_only) {
          printf("You're currently autoreplying to mail with the file %s\n",              filename);
          exit(0);
        }
        found++;
      }

    fclose(temp);
    fclose(repfile);

    if (! found) {
      printf("You're not currently autoreplying to mail%s\n",
          stat_only? "." : "!");
      if (! stat_only)
        unlink(tempfile);
      exit(! stat_only);
    }

    /** now copy tempfile back into replyfile **/

    if (copied == 0) {    /* removed the only person! */
      unlink(autoreply_file);
    }
    else {            /* save everyone else   */

      if ((temp = fopen(tempfile,"r")) == NULL) {
        printf("Error: couldn't reopen tempfile '%s'.  Not removed.\n",
            tempfile);
        unlink(tempfile);
        exit(1);
      }

      if ((repfile = fopen(autoreply_file, "w")) == NULL) {
        printf(
          "Error: couldn't reopen autoreply file for writing!  Not removed.\n");
        unlink(tempfile);
        exit(1);
      }

      while ((c = getc(temp)) != EOF)
        putc(c, repfile);

      fclose(temp);
      fclose(repfile);

    }
    unlink(tempfile);

    if (found > 1)
      printf("Warning: your username appeared %d times!!   Removed all\n",
          found);
    else
      printf("You've been removed from the autoreply table.\n");
}

add_user(filename)
char *filename;
{
    /** add the user to the autoreply file... **/

    FILE *repfile;
    char  mailfile[SLEN];
    long  bytes();

    if ((repfile = fopen(autoreply_file, "a")) == NULL) {
      printf("Error: couldn't open the autoreply file!  Not added\n");
      exit(1);
    }

    sprintf(mailfile,"%s/%s", mailhome, username);

    fprintf(repfile,"%s %s %ld\n", username, filename, bytes(mailfile));

    fclose(repfile);

    printf("You've been added to the autoreply system.\n");
}


long
bytes(name)
char *name;
{
    /** return the number of bytes in the specified file.  This
        is to check to see if new mail has arrived....  **/

    int ok = 1;
    extern int errno;    /* system error number! */
    struct stat buffer;

    if (stat(name, &buffer) != 0)
      if (errno != 2)
       exit(fprintf(stderr,"Error %d attempting fstat on %s", errno, name));
      else
        ok = 0;

    return(ok ? buffer.st_size : 0L);
}
END-OF-FILE

if [ "$filename" != "/dev/null" ]
then
  size=`wc -c < $filename`

  if [ $size != 4746 ]
  then
    echo $filename changed - should be 4746 bytes, not $size bytes
  fi

  chmod 666 $filename
fi

# ---------- file utils/fastmail.c ----------

filename="utils/fastmail.c"

if [ -f $filename ]
then
  echo File \"$filename\" already exists\!  Skipping...
  filename=/dev/null        # throw it away
else
  echo extracting file utils/fastmail.c...
fi

cat << 'END-OF-FILE' > $filename
/**            fastmail.c            **/

/** This program is specifically written for group mailing lists and
    such batch type mail processing.  It does NOT use aliases at all,
    it does NOT read the /etc/password file to find the From: name
    of the user and does NOT expand any addresses.  It is meant
    purely as a front-end for either /bin/mail or /usr/lib/sendmail
    (according to what is available on the current system).

         **** This program should be used with CAUTION *****

    (C) Copyright 1985 Dave Taylor
**/

/** The calling sequence for this program is:

    fastmail {args}  filename full-email-address

   where args could be any (or all) of;

       -b bcc-list        (Blind carbon copies to)
       -c cc-list        (carbon copies to)
       -d            (debug on)
       -f from         (from name)
       -r reply-to-address     (Reply-To:)
       -s subject         (subject of message)
**/

#include <stdio.h>

#ifdef BSD
#  include <sys/time.h>
#else
#  include <time.h>
#endif

#include "defs.h"

static char ident[] = { WHAT_STRING };

#define  binrmail    "/bin/rmail"
#define  temphome    "/tmp/fastmail."

#define DONE        0
#define ERROR        -1

char *optional_arg;            /* optional argument as we go */
int   opt_index;            /* argnum + 1 when we leave   */

char *arpa_dayname[] = { "Sun", "Mon", "Tue", "Wed", "Thu",
          "Fri", "Sat", "" };

char *arpa_monname[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
          "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", ""};

char *get_arpa_date();

#ifdef BSD
  char *timezone();
#else
  extern char *tzname[];
#endif

main(argc, argv)
int argc;
char *argv[];
{

    FILE *tempfile;
    char hostname[NLEN], username[NLEN], from_string[SLEN], subject[SLEN];
    char filename[SLEN], tempfilename[SLEN], command_buffer[256];
    char replyto[SLEN], cc_list[SLEN], bcc_list[SLEN], to_list[SLEN];
    int  c, sendmail_available, debug = 0;

    replyto[0] = '\0';
    cc_list[0] = '\0';
    bcc_list[0] = '\0';

    while ((c = get_options(argc, argv, "b:c:df:r:s:")) > 0) {
      switch (c) {
        case 'b' : strcpy(bcc_list, optional_arg);        break;
        case 'c' : strcpy(cc_list, optional_arg);        break;
        case 'd' : debug++;                    break;
        case 'f' : strcpy(from_string, optional_arg);    break;
        case 'r' : strcpy(replyto, optional_arg);        break;
        case 's' : strcpy(subject, optional_arg);        break;
       }
    }

    if (c == ERROR) {
      fprintf(stderr,"Usage: fastmail {args} filename address(es)\n");
      fprintf(stderr, "   where {args} can be;\n");
      fprintf(stderr,"\t-b bcc-list\n\t-c cc-list\n\t-d\n\t-f from-name\n");
      fprintf(stderr, "\t-r reply-to\n\t-s subject\n\n");
      exit(1);
    }

    if (opt_index > argc) {
      fprintf(stderr,"Usage: fastmail {args} filename address(es)\n");
      fprintf(stderr, "   where {args} can be;\n");
      fprintf(stderr,"\t-b bcc-list\n\t-c cc-list\n\t-d\n\t-f from-name\n");
      fprintf(stderr, "\t-r reply-to\n\t-s subject\n\n");
      exit(1);
    }

    strcpy(filename, argv[opt_index++]);

    if (opt_index > argc) {
      fprintf(stderr,"Usage: fastmail {args} filename address(es)\n");
      fprintf(stderr, "   where {args} can be;\n");
      fprintf(stderr,"\t-b bcc-list\n\t-c cc-list\n\t-d\n\t-f from-name\n");
      fprintf(stderr, "\t-r reply-to\n\t-s subject\n\n");
      exit(1);
    }

    gethostname(hostname, sizeof(hostname));
    strcpy(username, getlogin());
    if (strlen(username) == 0)
      cuserid(username);

    if (access(filename, READ_ACCESS) == -1)
      exit(fprintf(stderr, "Error: can't find file %s!\n", filename));

    sprintf(tempfilename, "%s%d", temphome, getpid());

    if ((tempfile = fopen(tempfilename, "w")) == NULL)
      exit(fprintf(stderr, "Couldn't open temp file %s\n", tempfilename));

    if (strlen(from_string) > 0)
      fprintf(tempfile, "From: %s!%s (%s)\n",
          hostname, username, from_string);
    else
      fprintf(tempfile, "From: %s!%s\n", hostname, username);

    fprintf(tempfile, "Date: %s\n", get_arpa_date());

    if (strlen(subject) > 0)
      fprintf(tempfile, "Subject: %s\n", subject);

    if (strlen(replyto) > 0)
      fprintf(tempfile, "Reply-To: %s\n", replyto);

    while (opt_index < argc)
          sprintf(to_list, "%s%s%s", to_list, (strlen(to_list) > 0? ", ":""),
          argv[opt_index++]);

    fprintf(tempfile, "To: %s\n", to_list);

    if (strlen(cc_list) > 0)
      fprintf(tempfile, "Cc: %s\n", cc_list);

    if (strlen(bcc_list) > 0)
      fprintf(tempfile, "Bcc: %s\n", bcc_list);    /* trust xport */

    fprintf(tempfile, "X-Mailer: fastmail [version %s]\n", VERSION);
    fprintf(tempfile, "\n");

    fclose(tempfile);

    /** now we'll cat both files to /bin/rmail or sendmail... **/

    sendmail_available = (access(sendmail, EXECUTE_ACCESS) != -1);

    printf("Mailing to %s%s%s%s%s [via %s]\n", to_list,
        (strlen(cc_list) > 0 ? " ":""), cc_list,
        (strlen(bcc_list) > 0 ? " ":""), bcc_list,
        sendmail_available? "sendmail" : "rmail");

    sprintf(command_buffer, "cat %s %s | %s '%s %s %s'",
        tempfilename, filename,
            sendmail_available? sendmail : mailer,
        to_list, cc_list, bcc_list);

    if (debug)
      printf("%s\n", command_buffer);

    system(command_buffer);

    unlink(tempfilename);
}


char *get_arpa_date()
{
    /** returns an ARPA standard date.  The format for the date
        according to DARPA document RFC-822 is exemplified by;

                     Mon, 12 Aug 85 6:29:08 MST

    **/

    static char buffer[SLEN];    /* static character buffer       */
    struct tm *the_time,        /* Time structure, see CTIME(3C) */
          *localtime();
    long       junk;        /* time in seconds....         */
#ifdef BSD
    struct  timeval  time_val;
    struct  timezone time_zone;
#endif

#ifdef BSD
    gettimeofday(&time_val, &time_zone);
    junk = time_val.tv_sec;
#else
    junk = time(0);    /* this must be here for it to work! */
#endif
    the_time = localtime(&junk);

    sprintf(buffer, "%s, %d %s %d %d:%02d:%02d %s",
      arpa_dayname[the_time->tm_wday],
      the_time->tm_mday % 32,
      arpa_monname[the_time->tm_mon],
      the_time->tm_year % 100,
      the_time->tm_hour % 24,
      the_time->tm_min  % 61,
      the_time->tm_sec  % 61,
#ifdef BSD
      timezone(time_zone.tz_minuteswest, time_zone.tz_dsttime));
#else
      tzname[the_time->tm_isdst]);
#endif

    return( (char *) buffer);
}

/** Starting argument parsing routine.

    Called as "get_options(argc, argv, options)" where options is a string
    of the form "abc:d" indicating that 'a' 'b' and 'd' are flags and
    'c' is a flag with a trailing argument.   Optional arguments are
    returned in the external char * variable "optional_arg", and the
    external int "opt_index" is set to the first entry in the argv list
    that wasn't processed (ie after the flags).

    For example, the C compiler would have something of the form
    getopt(argc, argv, "Oo:l:") to allow "cc -O -o output -l lib file.c"

    (C) Copyright 1986, Dave Taylor
**/

int  _indx = 1, _argnum = 1;

int
get_options(argc, argv, options)
int argc;
char *argv[], *options;
{
    /** Returns the character argument next, and optionally instantiates
        "argument" to the argument associated with the particular option
    **/

    char       *word, *strchr();

    if (_indx >= strlen(argv[_argnum])) {
      _argnum++;
      _indx = 1;        /* zeroeth char is '-' */
    }

    if (_argnum >= argc) {
      opt_index = argc;
      return(DONE);
    }

    if (argv[_argnum][0] != '-') {
      opt_index = _argnum;
      return(DONE);
    }

        word = strchr(options, argv[_argnum][_indx++]);

    if (strlen(word) == 0)
      return(ERROR);

    if (word[1] == ':') {

      /** Two possibilities - either tailing end of this argument or the
          next argument in the list **/

      if (_indx < strlen(argv[_argnum])) { /* first possibility */
        optional_arg = (char *) (argv[_argnum] + _indx);
        _argnum++;
        _indx = 1;
      }
      else {                /* second choice     */
        if (++_argnum >= argc)
          return(ERROR);            /* no argument!!     */

        optional_arg = (char *) argv[_argnum++];
        _indx = 1;
      }
    }

    return((int) word[0]);
}
END-OF-FILE

if [ "$filename" != "/dev/null" ]
then
  size=`wc -c < $filename`

  if [ $size != 7799 ]
  then
    echo $filename changed - should be 7799 bytes, not $size bytes
  fi

  chmod 666 $filename
fi

# ---------- file utils/from.c ----------

filename="utils/from.c"

if [ -f $filename ]
then
  echo File \"$filename\" already exists\!  Skipping...
  filename=/dev/null        # throw it away
else
  echo extracting file utils/from.c...
fi

cat << 'END-OF-FILE' > $filename
/**        from.c        **/

/** print out whom each message is from in the pending mailbox
    or specified one, including a subject line if available..

    Added PREFER_UUCP knowledge 6/86

    (C) Copyright 1986 Dave Taylor **/

#include <stdio.h>
#include "defs.h"

static char ident[] = { WHAT_STRING };

#define LINEFEED    (char) 10

#define metachar(c)    (c == '=' || c == '+' || c == '%')

FILE *mailfile;

char *expand_define();

main(argc, argv)
int argc;
char *argv[];
{
    char infile[LONG_SLEN], username[SLEN];

    if (argc > 2)
      exit(printf("Usage: %s {filename}\n", argv[0]));

    if (argc == 2)
      strcpy(infile, argv[1]);
    else {
      strcpy(username, getlogin());
      if (strlen(username) == 0)
        cuserid(username);
      sprintf(infile,"%s/%s",mailhome, username);
    }

    if (metachar(infile[0]))
      if (expand(infile) == 0)
         printf("%s: couldn't expand filename %s!\n", argv[0], infile);

    if ((mailfile = fopen(infile,"r")) == NULL) {
      if (argc == 1)
        printf("No mail!\n");
      else
        printf("%s: Couldn't open file %s\n", argv[0], infile);
    }
    else
      if (read_headers()==0)
        printf("No messages in mailbox!\n");
}

int
read_headers()
{
    /** read the headers, output as found **/

    char buffer[LONG_SLEN], from_whom[SLEN], subject[SLEN];
    register int subj = 0, in_header = 1, count = 0;

    while (fgets(buffer, LONG_SLEN, mailfile) != NULL) {
      if (first_word(buffer,"From ")) {
        if (real_from(buffer, from_whom)) {
          subj = 0;
          in_header = 1;
        }
      }
      else if (in_header) {
        if (first_word(buffer,">From"))
          forwarded(buffer, from_whom); /* return address */
        else if (first_word(buffer,"Subject:") ||
             first_word(buffer,"Re:")) {
          if (! subj++) {
            remove_first_word(buffer);
        strcpy(subject, buffer);
          }
        }
        else if (first_word(buffer,"From:"))
          parse_arpa_from(buffer, from_whom);
        else if (buffer[0] == LINEFEED) {
          in_header = 0;    /* in body of message! */
          show_header(from_whom, subject);
          from_whom[0] = 0;
          subject[0] = 0;
          count++;
        }
      }
    }
    return(count);
}

int
real_from(buffer, who)
char *buffer, *who;
{
    /***** returns true iff 's' has the seven 'from' fields,
           initializing the who to the sender *****/

    char junk[80];

    junk[0] = '\0';
    sscanf(buffer, "%*s %s %*s %*s %*s %*s %s",
                who, junk);
    return(junk[0] != '\0');
}

forwarded(buffer, who)
char *buffer, *who;
{
    /** change 'from' and date fields to reflect the ORIGINATOR of
        the message by iteratively parsing the >From fields... **/

    char machine[80], buff[80];

    machine[0] = '\0';
    sscanf(buffer, "%*s %s %*s %*s %*s %*s %*s %*s %*s %s",
                who, machine);

    if (machine[0] == '\0') /* try for srm address */
      sscanf(buffer, "%*s %s %*s %*s %*s %*s %*s %*s %s",
                who, machine);

    if (machine[0] == '\0')
      sprintf(buff,"anonymous");
    else
      sprintf(buff,"%s!%s", machine, who);

    strncpy(who, buff, 80);
}


remove_first_word(string)
char *string;
{    /** removes first word of string, ie up to first non-white space
        following a white space! **/

    register int loc;

    for (loc = 0; string[loc] != ' ' && string[loc] != '\0'; loc++)
        ;

    while (string[loc] == ' ' || string[loc] == '\t')
      loc++;

    move_left(string, loc);
}

move_left(string, chars)
char string[];
int  chars;
{
    /** moves string chars characters to the left DESTRUCTIVELY **/

    register int i;

    chars--; /* index starting at zero! */

    for (i=chars; string[i] != '\0' && string[i] != '\n'; i++)
      string[i-chars] = string[i];

    string[i-chars] = '\0';
}

show_header(from, subject)
char *from, *subject;
{
    /** output header in clean format, including abbreviation
        of return address if more than one machine name is
        contained within it! **/

    char buffer[SLEN];
    int  loc, i=0, exc=0;

#ifdef PREFER_UUCP

    if (chloc(from,'!') != -1 && in_string(from, BOGUS_INTERNET))
      from[strlen(from) - strlen(BOGUS_INTERNET)] = '\0';

#endif

    loc = strlen(from);

    while (exc < 2 && loc > 0)
      if (from[--loc] == '!')
        exc++;

    if (exc == 2) { /* lots of machine names!  Get last one */
      loc++;
      while (loc < strlen(from) && loc < SLEN)
        buffer[i++] = from[loc++];
      buffer[i] = '\0';
      printf("%-20s  %s\n", buffer, subject);
    }
    else
      printf("%-20s  %s\n", from, subject);
}

parse_arpa_from(buffer, newfrom)
char *buffer, *newfrom;
{
    /** try to parse the 'From:' line given... It can be in one of
        two formats:
        From: Dave Taylor <hpcnou!dat>
        or  From: hpcnou!dat (Dave Taylor)
        Change 'newfrom' ONLY if sucessfully parsed this entry and
        the resulting name is non-null!
    **/

    char temp_buffer[SLEN], *temp;
    register int i, j = 0;

    temp = (char *) temp_buffer;
    temp[0] = '\0';

    no_ret(buffer);        /* blow away '\n' char! */

    if (lastch(buffer) == '>') {
      for (i=strlen("From: "); buffer[i] != '\0' && buffer[i] != '<' &&
           buffer[i] != '('; i++)
        temp[j++] = buffer[i];
      temp[j] = '\0';
    }
    else if (lastch(buffer) == ')') {
      for (i=strlen(buffer)-2; buffer[i] != '\0' && buffer[i] != '(' &&
           buffer[i] != '<'; i--)
        temp[j++] = buffer[i];
      temp[j] = '\0';
      reverse(temp);
    }

    if (strlen(temp) > 0) {        /* mess with buffer... */

      /* remove leading spaces... */

      while (whitespace(temp[0]))
        temp = (char *) (temp + 1);        /* increment address! */

      /* remove trailing spaces... */

      i = strlen(temp) - 1;

      while (whitespace(temp[i]))
       temp[i--] = '\0';

      /* if anything is left, let's change 'from' value! */

      if (strlen(temp) > 0)
        strcpy(newfrom, temp);
    }
}

reverse(string)
char *string;
{
    /** reverse string... pretty trivial routine, actually! **/

    char buffer[SLEN];
    register int i, j = 0;

    for (i = strlen(string)-1; i >= 0; i--)
      buffer[j++] = string[i];

    buffer[j] = '\0';

    strcpy(string, buffer);
}

int
expand(infile)
char *infile;
{
    /** Expand the filename since the first character is a meta-
        character that should expand to the "maildir" variable
        in the users ".elmrc" file...

        Note: this is a brute force way of getting the entry out
        of the .elmrc file, and isn't recommended for the faint
        of heart!
    **/

    FILE *rcfile;
    char  buffer[SLEN], *expanded_dir, *home, *getenv(), *bufptr;
    int   foundit = 0;

    bufptr = (char *) buffer;        /* same address */

    if ((home = getenv("HOME")) == NULL) {
      printf(
         "Can't expand environment variable $HOME to find .elmrc file!\n");
      exit(1);
    }

    sprintf(buffer, "%s/%s", home, elmrcfile);

    if ((rcfile = fopen(buffer, "r")) == NULL) {
      printf("Can't open your \".elmrc\" file (%s) for reading!\n",
         buffer);
      exit(1);
    }

    while (fgets(buffer, SLEN, rcfile) != NULL && ! foundit) {
      if (strncmp(buffer, "maildir", 7) == 0 ||
          strncmp(buffer, "folders", 7) == 0) {
        while (*bufptr != '=' && *bufptr)
          bufptr++;
        bufptr++;            /* skip the equals sign */
        while (whitespace(*bufptr) && *bufptr)
          bufptr++;
        home = bufptr;        /* remember this address */

        while (! whitespace(*bufptr) && *bufptr != '\n')
          bufptr++;

        *bufptr = '\0';        /* remove trailing space */
         foundit++;
      }
    }

    fclose(rcfile);            /* be nice... */

    if (! foundit) {
      printf("Couldn't find \"maildir\" in your .elmrc file!\n");
      exit(1);
    }

    /** Home now points to the string containing your maildir, with
        no leading or trailing white space...
    **/

    expanded_dir = expand_define(home);

    sprintf(buffer, "%s%s%s", expanded_dir,
        (expanded_dir[strlen(expanded_dir)-1] == '/' ||
        infile[0] == '/') ? "" : "/", (char *) infile+1);

    strcpy(infile, buffer);
}

char *expand_define(maildir)
char *maildir;
{
    /** This routine expands any occurances of "~" or "$var" in
        the users definition of their maildir directory out of
        their .elmrc file.

        Again, another routine not for the weak of heart or staunch
        of will!
    **/

    static char buffer[SLEN];    /* static buffer AIEE!! */
    char   name[SLEN],        /* dynamic buffer!! (?) */
           *nameptr,           /*  pointer to name??     */
           *value;              /* char pointer for munging */

    if (*maildir == '~')
      sprintf(buffer, "%s%s", getenv("HOME"), ++maildir);
    else if (*maildir == '$') {     /* shell variable */

      /** break it into a single word - the variable name **/

      strcpy(name, (char *) maildir + 1);    /* hurl the '$' */
      nameptr = (char *) name;
      while (*nameptr != '/' && *nameptr) nameptr++;
      *nameptr = '\0';    /* null terminate */

      /** got word "name" for expansion **/

      if ((value = getenv(name)) == NULL) {
        printf("Couldn't expand shell variable $%s in .elmrc!\n", name);
        exit(1);
      }
      sprintf(buffer, "%s%s", value, maildir + strlen(name) + 1);
    }

    return( ( char *) buffer);
}
END-OF-FILE

if [ "$filename" != "/dev/null" ]
then
  size=`wc -c < $filename`

  if [ $size != 8783 ]
  then
    echo $filename changed - should be 8783 bytes, not $size bytes
  fi

  chmod 666 $filename
fi

# ---------- file utils/newmail.c ----------

filename="utils/newmail.c"

if [ -f $filename ]
then
  echo File \"$filename\" already exists\!  Skipping...
  filename=/dev/null        # throw it away
else
  echo extracting file utils/newmail.c...
fi

cat << 'END-OF-FILE' > $filename
/**            newmail.c            **/

/** Keep track of the mail for the current user...if new mail
    arrives, output a line of the form;

       Mail has arrived from <name> - <subject>

    where <name> is either the persons full name, or machine!login.
    If there is no subject, it will say.

    Added: you can specify a file other than the mailbox to keep
    track of - if an argument is given, the program will try
    to use it as a filename...

    Also, the program will quit when you log off of the machine.

    (C) 1986, Dave Taylor
**/

#ifdef AUTO_BACKGROUND
#include <signal.h>    /* background jobs ignore some signals... */
#endif

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>

#include "defs.h"

static char ident[] = { WHAT_STRING };

#define LINEFEED    (char) 10
#define BEGINNING    0            /* seek fseek(3S) */
#define SLEEP_TIME    60

#define NO_SUBJECT    "(No Subject Specified)"

FILE *mailfile;

long  bytes();

main(argc, argv)
int argc;
char *argv[];
{
    char filename[LONG_SLEN];
    long size, newsize;

    if (argc > 2)
      fprintf(stderr, "Usage: %s [filename] &\n", argv[0]);
    else if (argc == 2) {
      strcpy(filename, argv[1]);
      if (access(filename, ACCESS_EXISTS) == -1) {
        fprintf(stderr,"%s: Can't open file %s to keep track of!\n",
            argv[0], filename);
        exit(1);
      }
    }
    else
      sprintf(filename,"%s/%s",mailhome, getlogin());

#ifdef AUTO_BACKGROUND
    if (fork())        /* automatically puts this task in background! */
      exit(0);

    signal(SIGINT, SIG_IGN);
    signal(SIGQUIT, SIG_IGN);
    signal(SIGHUP,  SIG_DFL);    /* so we exit when logged out */
#endif

    size = bytes(filename);

    mailfile = (FILE *) NULL;

    while (1) {

#ifndef AUTO_BACKGROUND        /* won't work if we're nested this deep! */
      if (getppid() == 1)     /* we've lost our shell! */
        exit();
#endif

    /** Note the lack of error checking on the fopen() (Philip Peake
        did!) - this is okay since if it fails we don't have any
        mail and we can sleep(60) and try again later...
    **/

      if (mailfile == (FILE *) NULL)
        mailfile = fopen(filename,"r");

      if ((newsize = bytes(filename)) > size) {    /* new mail */
        fseek(mailfile, size, BEGINNING); /* skip all current mail */
        size = newsize;
        printf("\n\r");    /* blank lines surrounding message */
        read_headers();
        printf("\n\r");
      }
      else if (newsize != size) {
        size = newsize;         /* mail's been removed... */
        (void) fclose(mailfile);    /* close it and ...       */
        mailfile = (FILE *) NULL;    /* let's reopen the file  */
      }

      sleep(SLEEP_TIME);
    }
}

int
read_headers()
{
    /** read the headers, output as found **/

    char buffer[LONG_SLEN], from_whom[SLEN], subject[SLEN];
    register int subj = 0, in_header = 1, count = 0;

    while (fgets(buffer, LONG_SLEN, mailfile) != NULL) {
      if (first_word(buffer,"From ")) {
        if (real_from(buffer, from_whom)) {
          subj = 0;
          in_header = 1;
        }
      }
      else if (in_header) {
        if (first_word(buffer,">From"))
          forwarded(buffer, from_whom); /* return address */
        else if (first_word(buffer,"Subject:") ||
             first_word(buffer,"Re:")) {
          if (! subj++) {
            remove_first_word(buffer);
        strcpy(subject, buffer);
          }
        }
        else if (first_word(buffer,"From:"))
          parse_arpa_from(buffer, from_whom);
        else if (buffer[0] == LINEFEED) {
          in_header = 0;    /* in body of message! */
          show_header(from_whom, subject);
          from_whom[0] = 0;
          subject[0] = 0;
          count++;
        }
      }
    }
    return(count);
}

int
real_from(buffer, who)
char *buffer, *who;
{
    /***** returns true iff 's' has the seven 'from' fields,
           initializing the who to the sender *****/

    char junk[80];

    junk[0] = '\0';
    sscanf(buffer, "%*s %s %*s %*s %*s %*s %s",
                who, junk);
    return(junk[0] != '\0');
}

forwarded(buffer, who)
char *buffer, *who;
{
    /** change 'from' and date fields to reflect the ORIGINATOR of
        the message by iteratively parsing the >From fields... **/

    char machine[80], buff[80];

    machine[0] = '\0';
    sscanf(buffer, "%*s %s %*s %*s %*s %*s %*s %*s %*s %s",
                who, machine);

    if (machine[0] == '\0') /* try for srm address */
      sscanf(buffer, "%*s %s %*s %*s %*s %*s %*s %*s %s",
                who, machine);

    if (machine[0] == '\0')
      sprintf(buff,"anonymous");
    else
      sprintf(buff,"%s!%s", machine, who);

    strncpy(who, buff, 80);
}


remove_first_word(string)
char *string;
{    /** removes first word of string, ie up to first non-white space
        following a white space! **/

    register int loc;

    for (loc = 0; string[loc] != ' ' && string[loc] != '\0'; loc++)
        ;

    while (string[loc] == ' ' || string[loc] == '\t')
      loc++;

    move_left(string, loc);
}

move_left(string, chars)
char string[];
int  chars;
{
    /** moves string chars characters to the left DESTRUCTIVELY **/

    register int i;

    chars--; /* index starting at zero! */

    for (i=chars; string[i] != '\0' && string[i] != '\n'; i++)
      string[i-chars] = string[i];

    string[i-chars] = '\0';
}

show_header(from, subject)
char *from, *subject;
{
    /** output header in clean format, including abbreviation
        of return address if more than one machine name is
        contained within it! **/
    char buffer[SLEN];
    int  loc, i=0, exc=0;

#ifdef PREFER_UUCP

    if (chloc(from, '!') != -1 && in_string(from, BOGUS_INTERNET))
      from[strlen(from) - strlen(BOGUS_INTERNET)] = '\0';

#endif

    loc = strlen(from);

    while (exc < 2 && loc > 0)
      if (from[--loc] == '!')
        exc++;

    if (exc == 2) { /* lots of machine names!  Get last one */
      loc++;
      while (loc < strlen(from) && loc < SLEN)
        buffer[i++] = from[loc++];
      buffer[i] = '\0';
      strcpy(from, buffer);
    }

    if (strlen(subject) < 2)
      strcpy(subject, NO_SUBJECT);

    printf(">> New mail from %s - %s\n\r", from, subject);
}

parse_arpa_from(buffer, newfrom)
char *buffer, *newfrom;
{
    /** try to parse the 'From:' line given... It can be in one of
        two formats:
        From: Dave Taylor <hpcnou!dat>
        or  From: hpcnou!dat (Dave Taylor)
        Change 'newfrom' ONLY if sucessfully parsed this entry and
        the resulting name is non-null!
    **/

    char temp_buffer[SLEN], *temp;
    register int i, j = 0;

    temp = (char *) temp_buffer;
    temp[0] = '\0';

    no_ret(buffer);        /* blow away '\n' char! */

    if (lastch(buffer) == '>') {
      for (i=strlen("From: "); buffer[i] != '\0' && buffer[i] != '<' &&
           buffer[i] != '('; i++)
        temp[j++] = buffer[i];
      temp[j] = '\0';
    }
    else if (lastch(buffer) == ')') {
      for (i=strlen(buffer)-2; buffer[i] != '\0' && buffer[i] != '(' &&
           buffer[i] != '<'; i--)
        temp[j++] = buffer[i];
      temp[j] = '\0';
      reverse(temp);
    }

    if (strlen(temp) > 0) {        /* mess with buffer... */

      /* remove leading spaces... */

      while (whitespace(temp[0]))
        temp = (char *) (temp + 1);        /* increment address! */

      /* remove trailing spaces... */

      i = strlen(temp) - 1;

      while (whitespace(temp[i]))
       temp[i--] = '\0';

      /* if anything is left, let's change 'from' value! */

      if (strlen(temp) > 0)
        strcpy(newfrom, temp);
    }
}

reverse(string)
char *string;
{
    /** reverse string... pretty trivial routine, actually! **/

    char buffer[SLEN];
    register int i, j = 0;

    for (i = strlen(string)-1; i >= 0; i--)
      buffer[j++] = string[i];

    buffer[j] = '\0';

    strcpy(string, buffer);
}

long
bytes(name)
char *name;
{
    /** return the number of bytes in the specified file.  This
        is to check to see if new mail has arrived....  **/

    int ok = 1;
    extern int errno;    /* system error number! */
    struct stat buffer;

    if (stat(name, &buffer) != 0)
      if (errno != 2)
       exit(fprintf(stderr,"Error %d attempting fstat on %s", errno, name));
      else
        ok = 0;

    return(ok ? buffer.st_size : 0);
}
END-OF-FILE

if [ "$filename" != "/dev/null" ]
then
  size=`wc -c < $filename`

  if [ $size != 7761 ]
  then
    echo $filename changed - should be 7761 bytes, not $size bytes
  fi

  chmod 666 $filename
fi

# ---------- file utils/newalias.c ----------

filename="utils/newalias.c"

if [ -f $filename ]
then
  echo File \"$filename\" already exists\!  Skipping...
  filename=/dev/null        # throw it away
else
  echo extracting file utils/newalias.c...
fi

cat << 'END-OF-FILE' > $filename
/**        newalias.c        **/

/** (C) Copyright 1986 Dave Taylor      **/

/** Install a new set of aliases for the 'Elm' mailer.

    If invoked with a specific filename, it assumes that
  it is working with an individual users alias tables, and
  generates the .alias.hash and .alias.data files in their
  home directory.
    If, however, it is invoked with no arguments, then
  it assumes that the user is updating the system alias
  file and uses the defaults for everything.

  The format for the input file is;
    alias1, alias2, ... : username : address
or  alias1, alias2, ... : groupname: member, member, member, ...
                                     member, member, member, ...

  "-q" flag added: 6/17/86
**/

#ifdef BSD
#  include <sys/file.h>
#else
#  include <fcntl.h>
#endif

#include <stdio.h>
#include "defs.h"        /* ELM system definitions */

static char ident[] = { WHAT_STRING };

#ifndef TAB
# define TAB         '\t'    /* TAB character!         */
#endif

#define alias_hash    ".alias_hash"
#define alias_data    ".alias_data"
#define alias_text    ".alias_text"

#define group(string)        (strpbrk(string,", ") != NULL)

struct alias_rec
shash_table[MAX_SALIASES];    /* the actual hash table     */

struct alias_rec
uhash_table[MAX_UALIASES];    /* the actual hash table     */

int  hash_table_loaded=0;    /* is system table actually loaded? */

int  buff_loaded;        /* for file input overlap... */
int  error= 0;            /* if errors, don't save!    */
int  system=0;            /* system file updating?     */
int  count=0;            /* how many aliases so far?  */
long offset = 0L;        /* data file line offset!    */

main(argc, argv)
int argc;
char *argv[];
{
    FILE *in, *data;
    char inputname[SLEN], hashname[SLEN], dataname[SLEN];
    char home[SLEN], buffer[LONG_STRING];
    int  hash, count = 0, owner, quiet = 0;

    if (argc != 1)
      if (strcmp(argv[1], "-q") == 0)
        quiet++;
      else
        exit(printf("Usage: %s\n", argv[0]));

    owner = getuid();

    if (owner == 0 && ! quiet) {    /* being run by root! */
      printf("Would you like to update the system aliases? (y/n)");
      gets(buffer, 2);
      if (buffer[0] == 'y' || buffer[0] == 'Y') {
        printf("Updating the system alias file...\n");

        sprintf(inputname, "%s/%s", mailhome, alias_text);
        sprintf(hashname, "%s/%s", mailhome, alias_hash);
        sprintf(dataname, "%s/%s", mailhome, alias_data);
        system++;
        init_table(shash_table, MAX_SALIASES);
      }
      else
        printf("Updating your personal alias file...\n");
    }

    if (! system) {
      if (strcpy(home, getenv("HOME")) == NULL)
        exit(printf("Confused: No HOME variable in environment!\n"));

      sprintf(inputname, "%s/%s", home, alias_text);
      sprintf(hashname,  "%s/%s", home, alias_hash);
      sprintf(dataname,  "%s/%s", home, alias_data);

      init_table(uhash_table, MAX_UALIASES);

      read_in_system(shash_table, sizeof shash_table);
    }

    if ((in = fopen(inputname,"r")) == NULL)
      exit(printf("Couldn't open %s for input!\n", inputname));

    if ((hash = open(hashname, O_WRONLY | O_CREAT, 0644)) == -1)
      exit(printf("Couldn't open %s for output!\n", hashname));

    if ((data = fopen(dataname,"w")) == NULL)
      exit(printf("Couldn't open %s for output!\n", dataname));

    buff_loaded = 0;     /* file buffer empty right now! */

    while (get_alias(in, buffer) != -1) {
      if (system)
        put_alias(data, buffer, shash_table, MAX_SALIASES);
      else
        put_alias(data, buffer, uhash_table, MAX_UALIASES);
      count++;
    }

    if (error) {
      printf("\n** Not saving tables!  Please fix and re-run %s!\n",
         argv[0]);
      exit(1);
    }
    else {
      if (system)
        write(hash, shash_table, sizeof shash_table);
      else
        write(hash, uhash_table, sizeof uhash_table);

      close(hash);
      fclose(data);
      close(in);

      printf("Processed %d aliases\n", count);
      exit(0);
    }
}

int
get_alias(file, buffer)
FILE *file;
char *buffer;
{
    /* load buffer with the next complete alias from the file.
       (this can include reading in multiple lines and appending
       them all together!)  Returns EOF after last entry in file.

    Lines that start with '#' are assumed to be comments and are
     ignored.  White space as the first field of a line is taken
    to indicate that this line is a continuation of the previous. */

    static char mybuffer[SLEN];
    int    done = 0, first_read = 1;

    /** get the first line of the entry... **/

    buffer[0] = '\0';            /* zero out line */

    do {
      if (get_line(file, mybuffer, first_read) == -1)
        return(-1);
      first_read = 0;
      if (mybuffer[0] != '#')
        strcpy(buffer, mybuffer);
    } while (strlen(buffer) == 0);

    /** now read in the rest (if there is any!) **/

    do {
      if (get_line(file, mybuffer, first_read) == -1) {
        buff_loaded = 0;    /* force a read next pass! */
        return(0);    /* okay. let's just hand 'buffer' back! */
      }
      done = (mybuffer[0] != ' ' && mybuffer[0] != TAB);
      if (mybuffer[0] != '#' && ! done)
        strcat(buffer, mybuffer);
      done = (done && mybuffer[0] != '#');
    } while (! done);

    return(0);    /* no sweat! */
}

put_alias(data, buffer, table, size)
FILE *data;
char *buffer;
struct alias_rec table[];
int  size;
{
    /** break buffer down into two pieces: aliases, and address,
        throwing away the username (comment) field.
        Make the appropriate entries in the table (size) **/

    char aliases[LONG_STRING], address[LONG_STRING];
    int  i = 0, j = 0;

    remove_all(' ', TAB, buffer);

    for (i=0; buffer[i] != ':' && i < LONG_STRING; i++)
      aliases[i] = buffer[i];
    aliases[i] = '\0';

    for (i=strlen(buffer)-1; buffer[i] != ':' && i > 0; i--)
      address[j++] = buffer[i];
    address[j] = '\0';

    reverse(address);

    add_to_table(data, aliases, address, table, size);
}

int
get_line(file, buffer, first_line)
FILE *file;
char *buffer;
int  first_line;
{
    /** read line from file.  If first_line and buff_loaded,
        then just return! **/
    int stat;

    if (first_line && buff_loaded) {
      buff_loaded = 1;
      return;
    }

    buff_loaded = 1;    /* we're going to get SOMETHING in the buffer */

    stat = fgets(buffer, SLEN, file) == NULL ? -1 : 0;

    if (stat != -1)
      no_ret(buffer);

    return(stat);
}

reverse(string)
char *string;
{
    /** reverse the order of the characters in string...
        uses a bubble-sort type of algorithm!                 **/

    register int f, l;
    char     c;

    f = 0;
    l = strlen(string) - 1;

    while (f < l) {
      c = string[f];
       string[f] = string[l];
      string[l] = c;
      f++;
      l--;
    }
}

add_to_table(data, aliases, address, table, size)
FILE *data;
char *aliases, *address;
struct alias_rec table[];
int  size;
{
    /** add address to datafile, incrementing offset count (bytes),
        then for each alias in the aliases string, add to the
        hash table, with the associated pointer value! **/

    static char buf[SLEN], *word;
    long additive = 1L;

    word = buf;    /* use the allocated space! */

    if (group(address)) {
      check_group(address, aliases);
      if (error) return;    /* don't do work if we aren't to save it! */
      fprintf(data, "!%s\n", address);
      additive = 2L;
    }
    else {
      if (error) return;    /* don't do work if we aren't to save it! */
      fprintf(data, "%s\n", address);
    }

    while ((word = (char *) strtok(aliases,", ")) != NULL) {
      add_to_hash_table(word, offset, table, size);
      aliases = NULL;    /* let's get ALL entries via 'strtok' */
      count++;
    }

    if ( system ? count > MAX_SALIASES-35 : count > MAX_UALIASES-21) {
      printf("** Too many aliases in file! **\n");
      error++;
    }

    offset = (offset + (long) strlen(address) + additive);
}

remove_all(c1, c2, string)
char c1, c2, *string;
{
    /* remove all occurances of character 'c' from string. */
    char buffer[LONG_STRING];
    register int i = 0, j = 0;

    for (i = 0; string[i] != '\0' && i < LONG_STRING; i++)
      if (string[i] != c1 && string[i] != c2)
        buffer[j++] = string[i];

    buffer[j] = '\0';
    strcpy(string, buffer);
}

add_to_hash_table(word, offset, table, size)
char *word;
long  offset;
struct alias_rec table[];
int   size;
{
    /** add word and offset to current hash table. **/
    register int loc;

    if (strlen(word) > 20)
      exit(printf("Bad alias name: %s.  Too long.\n", word));

    loc = hash_it(word, size);

    while (table[loc].name[0] != '\0' && strcmp(table[loc].name, word) != 0)
      loc = loc + 1 % size;

    if (table[loc].name[0] == '\0') {
      strcpy(table[loc].name, word);
      table[loc].byte = offset;
    }
    else
      printf("** Duplicate alias '%s' in file.  Multiples ignored.\n",
             word);
}

int
hash_it(string, table_size)
char *string;
{
    /** compute the hash function of the string, returning
        it (mod table_size) **/

    register int i, sum = 0;

    for (i=0; string[i] != '\0'; i++)
      sum += (int) string[i];

    return(sum % table_size);
}

init_table(table, size)
struct alias_rec table[];
int size;
{
    /** initialize hash table! **/

    register int i;

    for (i=0; i < size; i++)
      table[i].name[0] = '\0';
}

read_in_system(table, size)
struct alias_rec table[];
int size;
{
    /** read in the system hash table...to check for group aliases
        from the user alias file (to ensure that there are no names
        in the user group files that are not purely contained within
        either alias table) **/

    int  fd;
    char fname[SLEN];

    sprintf(fname, "%s/%s", mailhome, alias_hash);

    if ((fd = open(fname, O_RDONLY)) == -1)
      return;    /* no sweat: flag 'hash_table_loaded' not set! */

    (void) read(fd, table, size);
    close(fd);
    hash_table_loaded++;
}

check_group(names, groupname)
char *names, *groupname;
{
    /** one by one make sure each name in the group is defined
        in either the system alias file or the user alias file.
        This search is linearly dependent, so all group aliases
        in the source file should appear LAST, after all the user
        aliases! **/

    char *word, *bufptr, buffer[LONG_STRING];

    strcpy(buffer, names);
    bufptr = (char *) buffer;

    while ((word = (char *) strtok(bufptr,", ")) != NULL) {
      if (! can_find(word))
        if (! valid_name(word)) {
          error++;
          printf("** Alias %s in group %s is bad!\n", word, groupname);
        }
      bufptr = NULL;
    }
}

int
can_find(name)
char *name;
{
    /** find name in either hash table...use 'system' variable to
        determine if we should look in both or just system....    **/

    register int loc;

    if (strlen(name) > 20) {
      error++;
      printf("** Bad alias name: %s.  Too long.\n", name);
      return(1);    /* fake out: don't want 2 error messages! */
    }

    /** system alias table... **/
    if (hash_table_loaded || system) {
      loc = hash_it(name, MAX_SALIASES);

      while (strcmp(name, shash_table[loc].name) != 0 &&
                 shash_table[loc].name[0] != '\0')
        loc = (loc + 1) % MAX_SALIASES;

      if (strcmp(name, shash_table[loc].name) == 0)
        return(1);    /* found it! */
    }

    if (! system) {    /* okay! Let's check the user alias file! */
      loc = hash_it(name, MAX_UALIASES);

      while (strcmp(name, uhash_table[loc].name) != 0 &&
                 uhash_table[loc].name[0] != '\0')
        loc = (loc + 1) % MAX_UALIASES;

      if (strcmp(name, uhash_table[loc].name) == 0)
        return(1);    /* found it! */
    }

    return(0);
}
END-OF-FILE

if [ "$filename" != "/dev/null" ]
then
  size=`wc -c < $filename`

  if [ $size != 11051 ]
  then
    echo $filename changed - should be 11051 bytes, not $size bytes
  fi

  chmod 666 $filename
fi

# ---------- file utils/printmail.c ----------

filename="utils/printmail.c"

if [ -f $filename ]
then
  echo File \"$filename\" already exists\!  Skipping...
  filename=/dev/null        # throw it away
else
  echo extracting file utils/printmail.c...
fi

cat << 'END-OF-FILE' > $filename
/**        printmail.c        **/

/** print mail, adding a formfeed between each message  **/
/** Modified to use stdin if being fed from a pipe.    **/

/** (C) Copyright 1985, Dave Taylor **/

#include <stdio.h>
#include "defs.h"

static char ident[] = { WHAT_STRING };

#define  dashes          \
"\n\n------------------------------------------------------------------------------\n\n"
#define  FF            "\014"    /* form feed! */

FILE *mailfile;
char  separator[80];

main(argc, argv)
int argc;
char *argv[];
{
    char infile[80], username[40], c;

    strcpy(separator, FF);

    *argv++;                /* get past argv[0] */

    if (argc > 1)
      if (strcmp(*argv, "-d") == 0) {
        strcpy(separator, dashes);
        --argc;
        *argv++;
      }

    if (argc > 1 && *argv[0] == '-')
        exit(fprintf(stderr, "Usage: printmail {-d} {filename (s)}\n"));

    if (argc == 1) {
      strcpy(username, getlogin());
      if (strlen(username) == 0)
        cuserid(username);
      if (isatty(fileno(stdin))) {    /* normal invokation... */
        sprintf(infile,"%s/%s",mailhome, username);
        if ((mailfile = fopen(infile,"r")) == NULL) {
          fprintf(stderr, "No mail!\n");
          exit(0);
        }
      }
      else
        mailfile = stdin;    /* read from stdin! */

      if (read_headers() == 0)
        fprintf(stderr, "No messages in mailbox!\n");
    }

    if (argc > 1)        /* more than one file - delimit each */
      if (strcmp(separator, FF) != 0)
        printf("\t\t\t%s\n%s", *argv, separator);
      else
        printf("\t\t\t%s\n\n", *argv);    /* Don't put a formfeed! */

    while (--argc) {
      if ((mailfile = fopen(*argv,"r")) == NULL) {
        fprintf(stderr, "Could not open file '%s'!", *argv);
        break;
      }
      else
        if (read_headers() == 0)
          fprintf(stderr, "No messages in mailbox '%s'!\n", *argv);
      *argv++;
      if (argc) {
        if (strcmp(separator, FF) != 0)
          printf("%s\t\t\t%s%s", separator, *argv, separator);
        else
          printf("%s\t\t\t%s\n\n", separator, *argv);
      }
    }
}

int
read_headers()
{
    char buffer[100];
    register int count = 0;

    while (fgets(buffer, 100, mailfile) != NULL)
      if (first_word(buffer,"From ")) {
        if (real_from(buffer)) {
          printf("%s%s", count ? separator : "", buffer);
          count++;
        }
      }
      else
        printf("%s", buffer);

    return(count);
}

int
real_from(buffer)
char *buffer;
{
    /***** returns true iff 's' has the seven 'from' fields *****/

    char junk[80];

    junk[0] = '\0';
    sscanf(buffer, "%*s %*s %*s %*s %*s %*s %s", junk);
    return(junk[0] != '\0');
}
END-OF-FILE

if [ "$filename" != "/dev/null" ]
then
  size=`wc -c < $filename`

  if [ $size != 2472 ]
  then
    echo $filename changed - should be 2472 bytes, not $size bytes
  fi

  chmod 666 $filename
fi

echo end of this archive file....
exit 0