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 of the
  33      * frm function.
  34      */
  35     FROMCOUNT = 24,
  36     SUBJCOUNT = 53
  37 };
  38
  39 static char rcsid[] = "$Id$";
  40
  41 static void
  42 scan_message(char *filename, char *fromheader, char *subjheader)
  43 {
  44     FILE *file;
  45     char *line;
  46     size_t len, fromcount, subjcount;
  47
  48     if (!(file = fopen(filename, "r"))) {
  49         err(EX_OSERR, "Failed fopen(%s)", filename);
  50     }
  51
  52     fromcount = subjcount = 0;
  53     while ((line = fgetln(file, &len))) {
  54         if (len <= 1) {
  55             break;
  56         }
  57         --len;
  58
  59         if (len > FROMLEN && strncmp(line, "From: ", FROMLEN) == 0) {
  60             line += FROMLEN;
  61             len -= FROMLEN;
  62             if (len < FROMCOUNT) {
  63                 fromcount = len;
  64             } else {
  65                 fromcount = FROMCOUNT;
  66             }
  67             strncpy(fromheader, line, fromcount);
  68             fromheader[fromcount] = '\0';
  69         } else if (len > SUBJLEN && strncmp(line, "Subject: ", SUBJLEN) == 0) {
  70             line += SUBJLEN;
  71             len -= SUBJLEN;
  72             if (len < SUBJCOUNT) {
  73                 subjcount = len;
  74             } else {
  75                 subjcount = SUBJCOUNT;
  76             }
  77             strncpy(subjheader, line, subjcount);
  78             subjheader[subjcount] = '\0';
  79         }
  80     }
  81
  82     fclose(file);
  83 }
  84
  85 static void
  86 frm(char *dirname)
  87 {
  88     DIR *dir;
  89     struct dirent *dirent;
  90     char *filename;
  91     char fromheader[FROMCOUNT + 1] = { '\0' };
  92     char subjheader[SUBJCOUNT + 1] = { '\0' };
  93
  94     if (chdir(dirname) != 0) {
  95         err(EX_OSERR, "Failed chdir(%s)", dirname);
  96     }
  97
  98     if (chdir("new") != 0) {
  99         err(EX_OSERR, "Failed chdir(%s/new)", dirname);
 100     }
 101
 102     dir = opendir(".");
 103     if (!dir) {
 104         err(EX_OSERR, "Failed opendir(%s/new)", dirname);
 105     }
 106
 107     for (dirent = readdir(dir); dirent; dirent = readdir(dir)) {
 108         filename = dirent->d_name;
 109         if (filename[0] == '.') {
 110             continue;
 111         }
 112
 113         scan_message(filename, fromheader, subjheader);
 114
 115         printf("%-24s  ", fromheader);
 116         printf("%-53s\n", subjheader);
 117     }
 118 }
 119
 120 int
 121 main(int argc, char *argv[])
 122 {
 123     char *dirname;
 124     char buf[PATH_MAX];
 125
 126     if (argv[1] && argv[1][0] == '-' && argv[1][1] == 'v') {
 127         puts(rcsid);
 128         return 0;
 129     }
 130
 131     if (!(dirname = argv[1])) {
 132         if (!(dirname = getenv("MAILDIR"))) {
 133             if (!(dirname = getenv("HOME"))) {
 134                 errx(EX_UNAVAILABLE, "Could not find maildir.");
 135             } else {
 136                 snprintf(buf, PATH_MAX, "%s/Maildir", dirname);
 137                 dirname = buf;
 138             }
 139         }
 140     }
 141
 142     frm(dirname);
 143
 144     return 0;
 145 }