git.marmaro.de Git - mmh/blob - uip/mhmail.c

   1 /*
   2 ** mhmail.c -- simple mail program
   3 **
   4 ** This code is Copyright (c) 2002, by the authors of nmh.  See the
   5 ** COPYRIGHT file in the root directory of the nmh distribution for
   6 ** complete copyright information.
   7 */
   8
   9 #include <h/mh.h>
  10 #include <h/signals.h>
  11 #include <h/utils.h>
  12 #include <signal.h>
  13 #include <fcntl.h>
  14
  15
  16 static struct swit switches[] = {
  17 #define BODYSW  0
  18         { "bodytext text", 0 },
  19 #define CCSW  1
  20         { "cc addrs ...", 0 },
  21 #define FROMSW  2
  22         { "from addr", 0 },
  23 #define SUBJSW  3
  24         { "subject text", 0 },
  25 #define VERSIONSW  4
  26         { "Version", 0 },
  27 #define HELPSW  5
  28         { "help", 0 },
  29         { NULL, 0 }
  30 };
  31
  32 static char tmpfil[BUFSIZ];
  33
  34 /*
  35 ** static prototypes
  36 */
  37 static void intrser(int);
  38
  39
  40 int
  41 main(int argc, char **argv)
  42 {
  43         pid_t child_id;
  44         int status, iscc = 0, nvec;
  45         char *cp, *tolist = NULL, *cclist = NULL, *subject = NULL;
  46         char *from = NULL, *body = NULL, **argp, **arguments;
  47         char *vec[5], buf[BUFSIZ];
  48         FILE *out;
  49         char *tfile = NULL;
  50
  51         setlocale(LC_ALL, "");
  52         invo_name = mhbasename(argv[0]);
  53
  54         /* Without arguments, exit. */
  55         if (argc == 1) {
  56                 adios(NULL, "no interactive mail shell. Use inc/scan/show instead.");
  57         }
  58
  59         context_read();
  60
  61         arguments = getarguments(invo_name, argc, argv, 0);
  62         argp = arguments;
  63
  64         while ((cp = *argp++)) {
  65                 if (*cp == '-') {
  66                         switch (smatch(++cp, switches)) {
  67                         case AMBIGSW:
  68                                 ambigsw(cp, switches);
  69                                 /* sysexits.h EX_USAGE */
  70                                 exit(1);
  71                         case UNKWNSW:
  72                                 adios(NULL, "-%s unknown", cp);
  73
  74                         case HELPSW:
  75                                 snprintf(buf, sizeof(buf),
  76                                                 "%s addrs... [switches]",
  77                                                 invo_name);
  78                                 print_help(buf, switches, 0);
  79                                 exit(0);
  80                         case VERSIONSW:
  81                                 print_version(invo_name);
  82                                 exit(0);
  83
  84                         case FROMSW:
  85                                 if (!(from = *argp++) || *from == '-')
  86                                         adios(NULL, "missing argument to %s",
  87                                                         argp[-2]);
  88                                 continue;
  89
  90                         case BODYSW:
  91                                 if (!(body = *argp++) || *body == '-')
  92                                         adios(NULL, "missing argument to %s",
  93                                                         argp[-2]);
  94                                 continue;
  95
  96                         case CCSW:
  97                                 iscc++;
  98                                 continue;
  99
 100                         case SUBJSW:
 101                                 if (!(subject = *argp++) || *subject == '-')
 102                                         adios(NULL, "missing argument to %s",
 103                                                         argp[-2]);
 104                                 continue;
 105                         }
 106                 }
 107                 if (iscc)
 108                         cclist = cclist ? add(cp, add(", ", cclist)) :
 109                                         getcpy(cp);
 110                 else
 111                         tolist = tolist ? add(cp, add(", ", tolist)) :
 112                                         getcpy(cp);
 113         }
 114
 115         if (tolist == NULL)
 116                 adios(NULL, "usage: %s addrs ... [switches]", invo_name);
 117
 118         tfile = m_mktemp2("/tmp/", invo_name, NULL, &out);
 119         if (tfile == NULL)
 120                 adios("mhmail", "unable to create temporary file");
 121         chmod(tfile, 0600);
 122         strncpy(tmpfil, tfile, sizeof(tmpfil));
 123
 124         SIGNAL2(SIGINT, intrser);
 125
 126         fprintf(out, "To: %s\n", tolist);
 127         if (cclist)
 128                 fprintf(out, "Cc: %s\n", cclist);
 129         if (subject)
 130                 fprintf(out, "Subject: %s\n", subject);
 131         if (from)
 132                 fprintf(out, "From: %s\n", from);
 133         fputs("\n", out);
 134
 135         if (body) {
 136                 fprintf(out, "%s", body);
 137                 if (*body && body[strlen(body) - 1] != '\n')
 138                         fputs("\n", out);
 139         } else {
 140                 int empty = 1;
 141
 142                 while (fgets(buf, sizeof buf, stdin)) {
 143                         if (buf[0]=='.' && buf[1]=='\n') {
 144                                 /* A period alone on a line means EOF. */
 145                                 break;
 146                         }
 147                         empty = 0;
 148                         if (fputs(buf, out) == EOF) {
 149                                 adios(tmpfil, "error writing");
 150                         }
 151                 }
 152                 if (empty) {
 153                         unlink(tmpfil);
 154                         adios(NULL, "not sending message with empty body");
 155                 }
 156         }
 157         fclose(out);
 158
 159         nvec = 0;
 160         vec[nvec++] = "spost";
 161         vec[nvec++] = tmpfil;
 162         vec[nvec] = NULL;
 163
 164         if ((child_id = fork()) == NOTOK) {
 165                 /* report failure and then send it */
 166                 adios(NULL, "unable to fork");
 167
 168         } else if (child_id == 0) {
 169                 /* child process */
 170                 execvp(*vec, vec);
 171                 fprintf(stderr, "unable to exec ");
 172                 perror(*vec);
 173                 _exit(-1);
 174
 175         } else {
 176                 /* parent process */
 177                 if ((status = pidXwait(child_id, *vec))) {
 178                         /* spost failed, save draft as dead.letter */
 179                         int in, out;
 180
 181                         in = open(tmpfil, O_RDONLY);
 182                         out = creat("dead.letter", 0600);
 183                         if (in == -1 || out == -1) {
 184                                 fprintf(stderr, "Letter left at %s.\n",
 185                                                 tmpfil);
 186                                 /* sysexits.h exit-status from spost */
 187                                 exit(status ? 1 : 0);
 188                         }
 189                         cpydata(in, out, tmpfil, "dead.letter");
 190                         close(in);
 191                         close(out);
 192                         fprintf(stderr, "Letter saved in dead.letter\n");
 193                 }
 194                 unlink(tmpfil);
 195                 /* sysexits.h exit status from spost */
 196                 exit(status ? 1 : 0);
 197         }
 198
 199         return 0;  /* dead code to satisfy the compiler */
 200 }
 201
 202
 203 static void
 204 intrser(int i)
 205 {
 206         unlink(tmpfil);
 207         exit(i != 0 ? 1 : 0);
 208 }
 209