diplodocus.org Git - nmh/blob - docs/historical/2.9BSD/cmds/mail.c

   1 #include "mh.h"
   2 #include <stdio.h>
   3 #include <signal.h>
   4
   5 #define NUMTOS  10              /* Number of to's & cc's accepted */
   6
   7 char    tmpfil[32];
   8 int     exitstat = 1;
   9 char    *subject, *cc, *body;
  10
  11 struct swit switches[] = {
  12         "body",         0,      /* 0 */
  13         "cc",           0,      /* 1 */
  14         "subject",      0,      /* 2 */
  15         "help",         4,      /* 3 */
  16         0,              0
  17 };
  18
  19 main(argc, argv)
  20 int argc;
  21 char *argv[];
  22 {
  23         register FILE *out;
  24         register int i, cnt;
  25         register char *cp;
  26         int pid, status, top, ccp, sig(), somebody = 0;
  27         char buf[BUFSIZ], *tos[NUMTOS], *ccs[NUMTOS], **argp;
  28
  29         top = 0;
  30         ccp = -1;               /* -1 -> collecting TOs */
  31         if(argc == 1) {         /* Just call inc to read mail */
  32                 execl("/bin/inc", "inc", 0);
  33                 execl("/usr/bin/inc", "inc", 0);
  34                 perror("inc");
  35                 done(exitstat);
  36         }
  37         argp = argv + 1;
  38         while(cp = *argp++) {
  39                 if(*cp == '-')
  40                         switch(smatch(++cp, switches)) {
  41                         case -2:ambigsw(cp, switches);  /* ambiguous */
  42                                 done(exitstat);
  43                                                         /* unknown */
  44                         case -1:fprintf(stderr, "send: -%s unknown\n", cp);
  45                                 done(exitstat);
  46                                                         /* -body */
  47                         case 0: if((body = *argp++) == 0) {
  48                      missing:           fprintf(stderr, "Mail: Missing %s arg\n", cp);
  49                                         done(exitstat);
  50                                 }
  51                                 continue;
  52                                                         /* -cc */
  53                         case 1: ccp = 0;                /* Now collecting ccs */
  54                                 continue;
  55                                                         /* -subject */
  56                         case 2: if((subject = *argp++) == 0)
  57                                         goto missing;
  58                                 continue;
  59                                                         /* -help */
  60                         case 3: help("mail [switches] users ...",
  61                                      switches);
  62                                 done(0);
  63                         }
  64                 else {
  65                         if(ccp >= 0) {                  /* If getting ccs..*/
  66                                 if(ccp < NUMTOS)
  67                                         ccs[ccp++] = cp;
  68                                 else {
  69                                         fprintf(stderr, "Mail: Too many ccs\n");
  70                                         done(exitstat);
  71                                 }
  72                         } else {                        /* Else, to */
  73                                 if(top < NUMTOS)
  74                                         tos[top++] = cp;
  75                                 else {
  76                                         fprintf(stderr, "Mail: Too many tos\n");
  77                                         done(exitstat);
  78                                 }
  79                         }
  80                 }
  81         }
  82                                         /* Create a mail temp file */
  83         sprintf(tmpfil, "/tmp/%s", makename("mail", ".tmp"));
  84         if((out = fopen(tmpfil, "w")) == NULL) {
  85                 perror(tmpfil);
  86                 done(exitstat);
  87         }
  88         signal(SIGINT, sig);            /* Clean up if user <del>s out */
  89         fprintf(out, "To: ");           /* Create to list */
  90         for(i = 0; i < top;) {
  91                 fprintf(out, "%s", tos[i]);
  92                 if(++i < top)
  93                         fprintf(out, ", ");
  94         }
  95         fprintf(out, "\n");
  96         if(ccp > 0) {
  97                 fprintf(out, "Cc: ");   /* Create cc list if needed */
  98                 for(i = 0; i < ccp;) {
  99                         fprintf(out, "%s", ccs[i]);
 100                         if(++i < ccp)
 101                                 fprintf(out, ", ");
 102                 }
 103                 fprintf(out, "\n");
 104         }
 105         if(subject)                     /* Create subject if needed */
 106                 fprintf(out, "Subject: %s\n", subject);
 107
 108         fprintf(out, "\n");
 109
 110         if(body) {                      /* Use body if I have it, */
 111                 somebody++;
 112                 fprintf(out, "%s\n", body);
 113         } else {                        /* Otherwise, get a body */
 114                 while((cnt = read(0, buf, sizeof buf)) > 0) {
 115                         somebody++;
 116                         if(!fwrite(buf, cnt, 1, out)) {
 117                                 perror(tmpfil);
 118                                 sig();
 119                         }
 120                 }
 121         }
 122
 123         if(ferror(out)) {               /* Check that all wrote well */
 124                 fprintf(stderr, "Error writing tmp file\n");
 125                 sig();
 126         }
 127         fclose(out);
 128         if(!somebody)                   /* If NO body, then don't send */
 129                 sig();                  /*  To be compatible with BELL mail */
 130         while((i = fork()) == -1) {     /* Now, deliver the mail */
 131                 fprintf(stderr, "Waiting for a fork...\n");
 132                 sleep(2);
 133         }
 134         if(i == 0) {                    /* Call deliverer in child */
 135                 execl(mh_deliver, mh_deliver, tmpfil, 0);
 136                 perror(mh_deliver);
 137                 done(exitstat);
 138         }
 139         signal(SIGINT, SIG_IGN);
 140         while((pid = wait(&status)) != -1 && pid != i) ;
 141         if(status) {                    /* And save mail if delivery failed */
 142                 signal(SIGINT, SIG_DFL);
 143                 fprintf(stderr, "Letter saved in dead.letter\n");
 144                 execl("/bin/mv", "mv", tmpfil, "dead.letter", 0);
 145                 execl("/usr/bin/mv", "mv", tmpfil, "dead.letter", 0);
 146                 perror("/bin/mv");
 147                 done(exitstat);
 148         }
 149         exitstat = 0;
 150         sig();
 151 }
 152
 153 sig()
 154 {
 155         unlink(tmpfil);
 156         done(exitstat);
 157 }