edit.c

   1 /*@ S-nail - a mail user agent derived from Berkeley Mail.
   2  *@ Perform message editing functions.
   3  *
   4  * Copyright (c) 2000-2004 Gunnar Ritter, Freiburg i. Br., Germany.
   5  * Copyright (c) 2012 - 2013 Steffen "Daode" Nurpmeso <sdaoden@users.sf.net>.
   6  */
   7 /*
   8  * Copyright (c) 1980, 1993
   9  *      The Regents of the University of California.  All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. All advertising materials mentioning features or use of this software
  20  *    must display the following acknowledgement:
  21  *      This product includes software developed by the University of
  22  *      California, Berkeley and its contributors.
  23  * 4. Neither the name of the University nor the names of its contributors
  24  *    may be used to endorse or promote products derived from this software
  25  *    without specific prior written permission.
  26  *
  27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  37  * SUCH DAMAGE.
  38  */
  39
  40 #include "nail.h"
  41
  42 static int edit1(int *msgvec, int viored);
  43
  44 /*
  45  * Edit a message list.
  46  */
  47 int
  48 editor(void *v)
  49 {
  50         int *msgvec = v;
  51
  52         return edit1(msgvec, 'e');
  53 }
  54
  55 /*
  56  * Invoke the visual editor on a message list.
  57  */
  58 int
  59 visual(void *v)
  60 {
  61         int *msgvec = v;
  62
  63         return edit1(msgvec, 'v');
  64 }
  65
  66 /*
  67  * Edit a message by writing the message into a funnily-named file
  68  * (which should not exist) and forking an editor on it.
  69  * We get the editor from the stuff above.
  70  */
  71 static int
  72 edit1(int *msgvec, int viored)
  73 {
  74         int c, i, wb, lastnl;
  75         FILE *fp = NULL;
  76         struct message *mp;
  77         off_t size;
  78         char *line = NULL;
  79         size_t linesize;
  80
  81         /*
  82          * Deal with each message to be edited . . .
  83          */
  84         wb = value("writebackedited") != NULL;
  85         for (i = 0; msgvec[i] && i < msgCount; i++) {
  86                 sighandler_type sigint;
  87
  88                 if (i > 0) {
  89                         char *p;
  90
  91                         printf(tr(72, "Edit message %d [ynq]? "), msgvec[i]);
  92                         fflush(stdout);
  93                         if (readline_restart(stdin, &line, &linesize, 0) < 0)
  94                                 break;
  95                         for (p = line; blankchar(*p); p++)
  96                                 ;
  97                         if (*p == 'q')
  98                                 break;
  99                         if (*p == 'n')
 100                                 continue;
 101                 }
 102                 setdot(mp = &message[msgvec[i] - 1]);
 103                 did_print_dot = TRU1;
 104                 touch(mp);
 105
 106                 sigint = safe_signal(SIGINT, SIG_IGN);
 107                 --mp->m_size; /* Strip final NL.. */
 108                 fp = run_editor(fp, -1/*mp->m_size*/, viored,
 109                                 (mb.mb_perm & MB_EDIT) == 0 || ! wb,
 110                                 NULL, mp, wb ? SEND_MBOX : SEND_TODISP_ALL,
 111                                 sigint);
 112                 ++mp->m_size; /* And readd it */
 113                 if (fp != NULL) {
 114                         fseek(mb.mb_otf, 0L, SEEK_END);
 115                         size = ftell(mb.mb_otf);
 116                         mp->m_block = mailx_blockof(size);
 117                         mp->m_offset = mailx_offsetof(size);
 118                         mp->m_lines = 0;
 119                         mp->m_flag |= MODIFY;
 120                         rewind(fp);
 121                         lastnl = 0;
 122                         size = 0;
 123                         while ((c = getc(fp)) != EOF) {
 124                                 if ((lastnl = c == '\n'))
 125                                         mp->m_lines++;
 126                                 if (putc(c, mb.mb_otf) == EOF)
 127                                         break;
 128                                 ++size;
 129                         }
 130                         if (! lastnl && putc('\n', mb.mb_otf) != EOF)
 131                                 ++size;
 132                         if (putc('\n', mb.mb_otf) != EOF)
 133                                 ++size;
 134                         mp->m_size = (size_t)size;
 135                         if (ferror(mb.mb_otf))
 136                                 perror("/tmp");
 137                         Fclose(fp);
 138                 }
 139                 safe_signal(SIGINT, sigint);
 140         }
 141         if (line)
 142                 free(line);
 143         return 0;
 144 }
 145
 146 /*
 147  * Run an editor on the file at "fpp" of "size" bytes,
 148  * and return a new file pointer.
 149  * Signals must be handled by the caller.
 150  * "viored" is 'e' for ed, 'v' for vi.
 151  */
 152 FILE *
 153 run_editor(FILE *fp, off_t size, int viored, int readonly,
 154                 struct header *hp, struct message *mp, enum sendaction action,
 155                 sighandler_type oldint)
 156 {
 157         FILE *nf = NULL;
 158         int t;
 159         time_t modtime;
 160         char const *ed;
 161         struct stat statb;
 162         char *tempEdit;
 163         sigset_t cset;
 164
 165         if ((nf = Ftemp(&tempEdit, "Re", "w", readonly ? 0400 : 0600, 1))
 166                         == NULL) {
 167                 perror(tr(73, "temporary mail edit file"));
 168                 goto out;
 169         }
 170         if (hp) {
 171                 t = GTO|GSUBJECT|GCC|GBCC|GNL|GCOMMA;
 172                 if (hp->h_from || hp->h_replyto || hp->h_sender ||
 173                                 hp->h_organization)
 174                         t |= GIDENT;
 175                 puthead(hp, nf, t, SEND_TODISP, CONV_NONE, NULL, NULL);
 176         }
 177         if (mp) {
 178                 sendmp(mp, nf, 0, NULL, action, NULL);
 179         } else {
 180                 if (size >= 0)
 181                         while (--size >= 0 && (t = getc(fp)) != EOF)
 182                                 putc(t, nf);
 183                 else
 184                         while ((t = getc(fp)) != EOF)
 185                                 putc(t, nf);
 186         }
 187         fflush(nf);
 188         if (fstat(fileno(nf), &statb) < 0)
 189                 modtime = 0;
 190         else
 191                 modtime = statb.st_mtime;
 192         if (ferror(nf)) {
 193                 Fclose(nf);
 194                 perror(tempEdit);
 195                 nf = NULL;
 196                 goto out;
 197         }
 198         if (Fclose(nf) < 0) {
 199                 perror(tempEdit);
 200                 nf = NULL;
 201                 goto out;
 202         }
 203         nf = NULL;
 204
 205         if ((ed = value(viored == 'e' ? "EDITOR" : "VISUAL")) == NULL)
 206                 ed = (viored == 'e') ? "ed" : "vi";
 207         sigemptyset(&cset);
 208         if (run_command(ed, oldint != SIG_IGN ? &cset : NULL, -1, -1,
 209                                 tempEdit, NULL, NULL) < 0)
 210                 goto out;
 211
 212         /*
 213          * If in read only mode or file unchanged, just remove the editor
 214          * temporary and return.  Otherwise switch to new file.
 215          */
 216         if (readonly)
 217                 goto out;
 218         if (stat(tempEdit, &statb) < 0) {
 219                 perror(tempEdit);
 220                 Ftfree(&tempEdit);
 221                 goto out;
 222         }
 223         if (modtime != statb.st_mtime && (nf = Fopen(tempEdit, "a+")) == NULL)
 224                 perror(tempEdit);
 225 out:
 226         if (tempEdit != NULL) {
 227                 unlink(tempEdit);
 228                 Ftfree(&tempEdit);
 229         }
 230         return nf;
 231 }