diplodocus.org Git - nmh/blob - uip/mhmail.c

   1
   2 /*
   3  * mhmail.c -- simple mail program
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/signals.h>
  12 #include <h/utils.h>
  13 #include <signal.h>
  14
  15 static struct swit switches[] = {
  16 #define BODYSW             0
  17     { "body text", 0 },
  18 #define CCSW               1
  19     { "cc addrs ...", 0 },
  20 #define FROMSW             2
  21     { "from addr", 0 },
  22 #define SUBJSW             3
  23     { "subject text", 0 },
  24 #define VERSIONSW          4
  25     { "version", 0 },
  26 #define HELPSW             5
  27     { "help", 0 },
  28 #define RESNDSW            6
  29     { "resent", -6 },
  30 #define QUEUESW            7
  31     { "queued", -6 },
  32     { NULL, 0 }
  33 };
  34
  35 static char tmpfil[BUFSIZ];
  36
  37 /*
  38  * static prototypes
  39  */
  40 static RETSIGTYPE intrser (int);
  41
  42
  43 int
  44 main (int argc, char **argv)
  45 {
  46     pid_t child_id;
  47     int status, i, iscc = 0, nvec;
  48     int queued = 0, resent = 0, somebody;
  49     char *cp, *tolist = NULL, *cclist = NULL, *subject = NULL;
  50     char *from = NULL, *body = NULL, **argp, **arguments;
  51     char *vec[5], buf[BUFSIZ];
  52     FILE *out;
  53     char *tfile = NULL;
  54
  55 #ifdef LOCALE
  56     setlocale(LC_ALL, "");
  57 #endif
  58     invo_name = r1bindex (argv[0], '/');
  59
  60     /* foil search of user profile/context */
  61     if (context_foil (NULL) == -1)
  62         done (1);
  63
  64     /* If no arguments, just incorporate new mail */
  65     if (argc == 1) {
  66         execlp (incproc, r1bindex (incproc, '/'), NULL);
  67         adios (incproc, "unable to exec");
  68     }
  69
  70     arguments = getarguments (invo_name, argc, argv, 0);
  71     argp = arguments;
  72
  73     while ((cp = *argp++)) {
  74         if (*cp == '-') {
  75             switch (smatch (++cp, switches)) {
  76                 case AMBIGSW:
  77                     ambigsw (cp, switches);
  78                     done (1);
  79                 case UNKWNSW:
  80                     adios (NULL, "-%s unknown", cp);
  81
  82                 case HELPSW:
  83                     snprintf (buf, sizeof(buf), "%s [addrs ... [switches]]",
  84                         invo_name);
  85                     print_help (buf, switches, 0);
  86                     done (1);
  87                 case VERSIONSW:
  88                     print_version(invo_name);
  89                     done (1);
  90
  91                 case FROMSW:
  92                     if (!(from = *argp++) || *from == '-')
  93                         adios (NULL, "missing argument to %s", argp[-2]);
  94                     continue;
  95
  96                 case BODYSW:
  97                     if (!(body = *argp++) || *body == '-')
  98                         adios (NULL, "missing argument to %s", argp[-2]);
  99                     continue;
 100
 101                 case CCSW:
 102                     iscc++;
 103                     continue;
 104
 105                 case SUBJSW:
 106                     if (!(subject = *argp++) || *subject == '-')
 107                         adios (NULL, "missing argument to %s", argp[-2]);
 108                     continue;
 109
 110                 case RESNDSW:
 111                     resent++;
 112                     continue;
 113
 114                 case QUEUESW:
 115                     queued++;
 116                     continue;
 117             }
 118         }
 119         if (iscc)
 120             cclist = cclist ? add (cp, add (", ", cclist)) : getcpy (cp);
 121         else
 122             tolist = tolist ? add (cp, add (", ", tolist)) : getcpy (cp);
 123     }
 124
 125     if (tolist == NULL)
 126         adios (NULL, "usage: %s addrs ... [switches]", invo_name);
 127
 128     tfile = m_mktemp2(NULL, invo_name, NULL, &out);
 129     if (tfile == NULL) adios("mhmail", "unable to create temporary file");
 130     chmod(tfile, 0600);
 131     strncpy (tmpfil, tfile, sizeof(tmpfil));
 132
 133     SIGNAL2 (SIGINT, intrser);
 134
 135     fprintf (out, "%sTo: %s\n", resent ? "Resent-" : "", tolist);
 136     if (cclist)
 137         fprintf (out, "%scc: %s\n", resent ? "Resent-" : "", cclist);
 138     if (subject)
 139         fprintf (out, "%sSubject: %s\n", resent ? "Resent-" : "", subject);
 140     if (from)
 141         fprintf (out, "%sFrom: %s\n", resent ? "Resent-" : "", from);
 142     if (!resent)
 143         fputs ("\n", out);
 144
 145     if (body) {
 146         fprintf (out, "%s", body);
 147         if (*body && *(body + strlen (body) - 1) != '\n')
 148             fputs ("\n", out);
 149     } else {
 150         for (somebody = 0;
 151                 (i = fread (buf, sizeof(*buf), sizeof(buf), stdin)) > 0;
 152                 somebody++)
 153             if (fwrite (buf, sizeof(*buf), i, out) != i)
 154                 adios (tmpfil, "error writing");
 155         if (!somebody) {
 156             unlink (tmpfil);
 157             done (1);
 158         }
 159     }
 160     fclose (out);
 161
 162     nvec = 0;
 163     vec[nvec++] = r1bindex (postproc, '/');
 164     vec[nvec++] = tmpfil;
 165     if (resent)
 166         vec[nvec++] = "-dist";
 167     if (queued)
 168         vec[nvec++] = "-queued";
 169     vec[nvec] = NULL;
 170
 171     for (i = 0; (child_id = fork()) == NOTOK && i < 5; i++)
 172         sleep (5);
 173
 174     if (child_id == NOTOK) {
 175         /* report failure and then send it */
 176         adios (NULL, "unable to fork");
 177     } else if (child_id) {
 178         /* parent process */
 179         if ((status = pidXwait(child_id, postproc))) {
 180             fprintf (stderr, "Letter saved in dead.letter\n");
 181             execl ("/bin/mv", "mv", tmpfil, "dead.letter", NULL);
 182             execl ("/usr/bin/mv", "mv", tmpfil, "dead.letter", NULL);
 183             perror ("mv");
 184             _exit (-1);
 185         }
 186         unlink (tmpfil);
 187         done (status ? 1 : 0);
 188     } else {
 189         /* child process */
 190         execvp (postproc, vec);
 191         fprintf (stderr, "unable to exec ");
 192         perror (postproc);
 193         _exit (-1);
 194     }
 195
 196     return 0;  /* dead code to satisfy the compiler */
 197 }
 198
 199
 200 static RETSIGTYPE
 201 intrser (int i)
 202 {
 203 #ifndef RELIABLE_SIGNALS
 204     if (i)
 205         SIGNAL (i, SIG_IGN);
 206 #endif
 207
 208     unlink (tmpfil);
 209     done (i != 0 ? 1 : 0);
 210 }
 211