diplodocus.org Git - mdfrm/blob - mdfrm.c

   1 /* mdfrm.c -- mdfrm(1) for maildir.
   2  *
   3  * $Id$
   4  *
   5  * This program is in the public domain.
   6  */
   7
   8 #include <sys/types.h>
   9
  10 #include <dirent.h>
  11 #include <err.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <string.h>
  15 #include <sysexits.h>
  16 #include <unistd.h>
  17
  18 /* Note that PATH_MAX is supposed to include the terminating null. */
  19 #ifndef PATH_MAX
  20 #ifndef MAXPATHLEN
  21 #define PATH_MAX 65
  22 #else
  23 #define PATH_MAX MAXPATHLEN
  24 #endif
  25 #endif
  26
  27 enum {
  28     FROMLEN = 6,                /* "From: " */
  29     SUBJLEN = 9,                /* "Subject: " */
  30
  31     /* Number of characters for each field we actually output.  This
  32      * must also be changed in the printf functions at the end.
  33      */
  34     FROMCOUNT = 24,
  35     SUBJCOUNT = 53
  36 };
  37
  38 static char rcsid[] = "$Id$";
  39
  40 int
  41 main(int argc, char *argv[])
  42 {
  43     char *dirname;
  44     char buf[PATH_MAX];
  45     DIR *dir;
  46     struct dirent *dirent;
  47     char *filename;
  48     FILE *file;
  49     char *line, *fromheader, *subjheader;
  50     size_t len, fromcount, subjcount;
  51
  52     if (argv[1] && argv[1][0] == '-' && argv[1][1] == 'v') {
  53         puts(rcsid);
  54         return 0;
  55     }
  56
  57     if (!(dirname = argv[1])) {
  58         if (!(dirname = getenv("MAILDIR"))) {
  59             if (!(dirname = getenv("HOME"))) {
  60                 errx(EX_UNAVAILABLE, "Could not find maildir.");
  61             } else {
  62                 snprintf(buf, PATH_MAX, "%s/Maildir", dirname);
  63                 dirname = buf;
  64             }
  65         }
  66     }
  67
  68     if (chdir(dirname) != 0) {
  69         err(EX_OSERR, "Failed chdir(%s)", dirname);
  70     }
  71
  72     if (chdir("new") != 0) {
  73         err(EX_OSERR, "Failed chdir(%s/new)", dirname);
  74     }
  75
  76     dir = opendir(".");
  77     if (!dir) {
  78         err(EX_OSERR, "Failed opendir(%s/new)", dirname);
  79     }
  80
  81     fromheader = malloc(FROMCOUNT + 1);
  82     subjheader = malloc(SUBJCOUNT + 1);
  83     for (dirent = readdir(dir); dirent; dirent = readdir(dir)) {
  84         filename = dirent->d_name;
  85         if (filename[0] == '.') {
  86             continue;
  87         }
  88
  89         if (!(file = fopen(filename, "r"))) {
  90             err(EX_OSERR, "Failed fopen(%s)", filename);
  91         }
  92
  93         fromheader[0] = subjheader[0] = '\0';
  94         fromcount = subjcount = 0;
  95         while ((line = fgetln(file, &len))) {
  96             if (len <= 1) {
  97                 break;
  98             }
  99             line[len - 1] = '\0';
 100
 101             if (len > FROMLEN
 102                 && strncmp(line, "From: ", FROMLEN) == 0) {
 103                 line += FROMLEN;
 104                 len -= FROMLEN;
 105                 if (len < FROMCOUNT) {
 106                     fromcount = len;
 107                 } else {
 108                     fromcount = FROMCOUNT;
 109                 }
 110                 strncpy(fromheader, line, fromcount);
 111             } else if (len > SUBJLEN
 112                        && strncmp(line, "Subject: ", SUBJLEN) == 0) {
 113                 line += SUBJLEN;
 114                 len -= SUBJLEN;
 115                 if (len < SUBJCOUNT) {
 116                     subjcount = len;
 117                 } else {
 118                     subjcount = SUBJCOUNT;
 119                 }
 120                 strncpy(subjheader, line, subjcount);
 121             }
 122         }
 123
 124         printf("%-24s  ", fromheader);
 125         printf("%-53s\n", subjheader);
 126     }
 127
 128     return 0;
 129 }