crypto/dist/heimdal/appl/popper/maildir.c

   1 /*
   2  * Copyright (c) 1998 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <popper.h>
  35 #include <dirent.h>
  36 __RCSID("$Heimdal: maildir.c 10678 2001-09-10 11:56:53Z joda $"
  37         "$NetBSD$");
  38
  39 static void
  40 make_path(POP *p, MsgInfoList *mp, int new, char *buf, size_t len)
  41 {
  42     snprintf(buf, len, "%s/%s%s%s", p->drop_name,
  43              new ? "new" : "cur", mp ? "/" : "", mp ? mp->name : "");
  44 }
  45
  46 static int
  47 scan_file(POP *p, MsgInfoList *mp)
  48 {
  49     char path[MAXPATHLEN];
  50     FILE *f;
  51     char buf[1024];
  52     int eoh = 0;
  53
  54     make_path(p, mp, mp->flags & NEW_FLAG, path, sizeof(path));
  55     f = fopen(path, "r");
  56
  57     if(f == NULL) {
  58 #ifdef DEBUG
  59         if(p->debug)
  60             pop_log(p, POP_DEBUG,
  61                     "Failed to open message file `%s': %s",
  62                     path, strerror(errno));
  63 #endif
  64         return pop_msg (p, POP_FAILURE,
  65                         "Failed to open message file `%s'", path);
  66     }
  67     while(fgets(buf, sizeof(buf), f)) {
  68         if(buf[strlen(buf) - 1] == '\n')
  69             mp->lines++;
  70         mp->length += strlen(buf);
  71         if(eoh)
  72             continue;
  73         if(strcmp(buf, "\n") == 0)
  74             eoh = 1;
  75         parse_header(mp, buf);
  76     }
  77     fclose(f);
  78     return add_missing_headers(p, mp);
  79 }
  80
  81 static int
  82 scan_dir(POP *p, int new)
  83 {
  84     char tmp[MAXPATHLEN];
  85     DIR *dir;
  86     struct dirent *dent;
  87     MsgInfoList *mp = p->mlp;
  88     int n_mp = p->msg_count;
  89     int e;
  90
  91     make_path(p, NULL, new, tmp, sizeof(tmp));
  92     mkdir(tmp, 0700);
  93     dir = opendir(tmp);
  94     while((dent = readdir(dir)) != NULL) {
  95         if(strcmp(dent->d_name, ".") == 0 || strcmp(dent->d_name, "..") == 0)
  96             continue;
  97         mp = realloc(mp, (n_mp + 1) * sizeof(*mp));
  98         if(mp == NULL) {
  99             p->msg_count = 0;
 100             return pop_msg (p, POP_FAILURE,
 101                             "Can't build message list for '%s': Out of memory",
 102                             p->user);
 103         }
 104         memset(mp + n_mp, 0, sizeof(*mp));
 105         mp[n_mp].name = strdup(dent->d_name);
 106         if(mp[n_mp].name == NULL) {
 107             p->msg_count = 0;
 108             return pop_msg (p, POP_FAILURE,
 109                             "Can't build message list for '%s': Out of memory",
 110                             p->user);
 111         }
 112         mp[n_mp].number = n_mp + 1;
 113         mp[n_mp].flags = 0;
 114         if(new)
 115             mp[n_mp].flags |= NEW_FLAG;
 116         e = scan_file(p, &mp[n_mp]);
 117         if(e != POP_SUCCESS)
 118             return e;
 119         p->drop_size += mp[n_mp].length;
 120         n_mp++;
 121     }
 122     closedir(dir);
 123     p->mlp = mp;
 124     p->msg_count = n_mp;
 125     return POP_SUCCESS;
 126 }
 127
 128 int
 129 pop_maildir_info(POP *p)
 130 {
 131     int e;
 132
 133     p->temp_drop[0] = '\0';
 134     p->mlp = NULL;
 135     p->msg_count = 0;
 136
 137     e = scan_dir(p, 0);
 138     if(e != POP_SUCCESS) return e;
 139
 140     e = scan_dir(p, 1);
 141     if(e != POP_SUCCESS) return e;
 142     return POP_SUCCESS;
 143 }
 144
 145 int
 146 pop_maildir_update(POP *p)
 147 {
 148     int i;
 149     char tmp1[MAXPATHLEN], tmp2[MAXPATHLEN];
 150     for(i = 0; i < p->msg_count; i++) {
 151         make_path(p, &p->mlp[i], p->mlp[i].flags & NEW_FLAG,
 152                   tmp1, sizeof(tmp1));
 153         if(p->mlp[i].flags & DEL_FLAG) {
 154 #ifdef DEBUG
 155             if(p->debug)
 156                 pop_log(p, POP_DEBUG, "Removing `%s'", tmp1);
 157 #endif
 158             if(unlink(tmp1) < 0) {
 159 #ifdef DEBUG
 160                 if(p->debug)
 161                     pop_log(p, POP_DEBUG, "Failed to remove `%s': %s",
 162                             tmp1, strerror(errno));
 163 #endif
 164                 /* return failure? */
 165             }
 166         } else if((p->mlp[i].flags & NEW_FLAG) &&
 167                   (p->mlp[i].flags & RETR_FLAG)) {
 168             make_path(p, &p->mlp[i], 0, tmp2, sizeof(tmp2));
 169 #ifdef DEBUG
 170             if(p->debug)
 171                 pop_log(p, POP_DEBUG, "Linking `%s' to `%s'", tmp1, tmp2);
 172 #endif
 173             if(link(tmp1, tmp2) == 0) {
 174 #ifdef DEBUG
 175                 if(p->debug)
 176                     pop_log(p, POP_DEBUG, "Removing `%s'", tmp1);
 177 #endif
 178                 if(unlink(tmp1) < 0) {
 179 #ifdef DEBUG
 180                     if(p->debug)
 181                         pop_log(p, POP_DEBUG, "Failed to remove `%s'", tmp1);
 182 #endif
 183                     /* return failure? */
 184                 }
 185             } else {
 186                 if(errno == EXDEV) {
 187 #ifdef DEBUG
 188                     if(p->debug)
 189                         pop_log(p, POP_DEBUG, "Trying to rename `%s' to `%s'",
 190                                 tmp1, tmp2);
 191 #endif
 192                     if(rename(tmp1, tmp2) < 0) {
 193 #ifdef DEBUG
 194                     if(p->debug)
 195                         pop_log(p, POP_DEBUG, "Failed to rename `%s' to `%s'",
 196                                 tmp1, tmp2);
 197 #endif
 198                     }
 199                 }
 200             }
 201         }
 202     }
 203     return(pop_quit(p));
 204 }
 205
 206 int
 207 pop_maildir_open(POP *p, MsgInfoList *mp)
 208 {
 209     char tmp[MAXPATHLEN];
 210     make_path(p, mp, mp->flags & NEW_FLAG, tmp, sizeof(tmp));
 211     if(p->drop)
 212         fclose(p->drop);
 213     p->drop = fopen(tmp, "r");
 214     if(p->drop == NULL)
 215         return pop_msg(p, POP_FAILURE, "Failed to open message file");
 216     return POP_SUCCESS;
 217 }