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 ident[] = "$Id$";
  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     fromheader[0] = subjheader[0] = '\0';
  54     while ((line = fgetln(file, &len))) {
  55         if (len <= 1) {
  56             break;
  57         }
  58         --len;
  59
  60         if (len > FROMLEN && strncmp(line, "From: ", FROMLEN) == 0) {
  61             line += FROMLEN;
  62             len -= FROMLEN;
  63             if (len < FROMCOUNT) {
  64                 fromcount = len;
  65             } else {
  66                 fromcount = FROMCOUNT;
  67             }
  68             strncpy(fromheader, line, fromcount);
  69             fromheader[fromcount] = '\0';
  70         } else if (len > SUBJLEN && strncmp(line, "Subject: ", SUBJLEN) == 0) {
  71             line += SUBJLEN;
  72             len -= SUBJLEN;
  73             if (len < SUBJCOUNT) {
  74                 subjcount = len;
  75             } else {
  76                 subjcount = SUBJCOUNT;
  77             }
  78             strncpy(subjheader, line, subjcount);
  79             subjheader[subjcount] = '\0';
  80         }
  81     }
  82
  83     fclose(file);
  84 }
  85
  86 static void
  87 frm(char *dirname)
  88 {
  89     DIR *dir;
  90     struct dirent *dirent;
  91     char *filename;
  92     char fromheader[FROMCOUNT + 1] = { '\0' };
  93     char subjheader[SUBJCOUNT + 1] = { '\0' };
  94
  95     if (chdir(dirname) != 0) {
  96         err(EX_OSERR, "Failed chdir(%s)", dirname);
  97     }
  98
  99     if (chdir("new") != 0) {
 100         err(EX_OSERR, "Failed chdir(%s/new)", dirname);
 101     }
 102
 103     dir = opendir(".");
 104     if (!dir) {
 105         err(EX_OSERR, "Failed opendir(%s/new)", dirname);
 106     }
 107
 108     for (dirent = readdir(dir); dirent; dirent = readdir(dir)) {
 109         filename = dirent->d_name;
 110         if (filename[0] == '.') {
 111             continue;
 112         }
 113
 114         scan_message(filename, fromheader, subjheader);
 115
 116         printf("%-24s  ", fromheader);
 117         printf("%-53s\n", subjheader);
 118     }
 119 }
 120
 121 int
 122 main(int argc, char *argv[])
 123 {
 124     char *dirname;
 125     char buf[PATH_MAX];
 126
 127     if (argv[1] && argv[1][0] == '-' && argv[1][1] == 'v') {
 128         puts(ident);
 129         return 0;
 130     }
 131
 132     if (!(dirname = argv[1])) {
 133         if (!(dirname = getenv("MAILDIR"))) {
 134             if (!(dirname = getenv("HOME"))) {
 135                 errx(EX_UNAVAILABLE, "Could not find maildir.");
 136             } else {
 137                 snprintf(buf, PATH_MAX, "%s/Maildir", dirname);
 138                 dirname = buf;
 139             }
 140         }
 141     }
 142
 143     frm(dirname);
 144
 145     return 0;
 146 }