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 - 2014 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 #ifndef HAVE_AMALGAMATION
  41 # include "nail.h"
  42 #endif
  43
  44 static int edit1(int *msgvec, int viored);
  45
  46 /*
  47  * Edit a message list.
  48  */
  49 FL int
  50 editor(void *v)
  51 {
  52         int *msgvec = v;
  53
  54         return edit1(msgvec, 'e');
  55 }
  56
  57 /*
  58  * Invoke the visual editor on a message list.
  59  */
  60 FL int
  61 visual(void *v)
  62 {
  63         int *msgvec = v;
  64
  65         return edit1(msgvec, 'v');
  66 }
  67
  68 /*
  69  * Edit a message by writing the message into a funnily-named file
  70  * (which should not exist) and forking an editor on it.
  71  * We get the editor from the stuff above.
  72  */
  73 static int
  74 edit1(int *msgvec, int viored)
  75 {
  76         int c, i, wb, lastnl;
  77         FILE *fp = NULL;
  78         struct message *mp;
  79         off_t size;
  80         char *line = NULL;
  81         size_t linesize = 0;
  82
  83         /*
  84          * Deal with each message to be edited . . .
  85          */
  86         wb = value("writebackedited") != NULL;
  87         for (i = 0; msgvec[i] && i < msgCount; i++) {
  88                 sighandler_type sigint;
  89
  90                 if (i > 0) {
  91                         char *p;
  92
  93                         printf(tr(72, "Edit message %d [ynq]? "), msgvec[i]);
  94                         fflush(stdout);
  95                         if (readline_restart(stdin, &line, &linesize, 0) < 0)
  96                                 break;
  97                         for (p = line; blankchar(*p); p++)
  98                                 ;
  99                         if (*p == 'q')
 100                                 break;
 101                         if (*p == 'n')
 102                                 continue;
 103                 }
 104                 setdot(mp = &message[msgvec[i] - 1]);
 105                 did_print_dot = TRU1;
 106                 touch(mp);
 107
 108                 sigint = safe_signal(SIGINT, SIG_IGN);
 109                 --mp->m_size; /* Strip final NL.. */
 110                 fp = run_editor(fp, -1/*mp->m_size*/, viored,
 111                                 (mb.mb_perm & MB_EDIT) == 0 || ! wb,
 112                                 NULL, mp, wb ? SEND_MBOX : SEND_TODISP_ALL,
 113                                 sigint);
 114                 ++mp->m_size; /* And readd it */
 115                 if (fp != NULL) {
 116                         fseek(mb.mb_otf, 0L, SEEK_END);
 117                         size = ftell(mb.mb_otf);
 118                         mp->m_block = mailx_blockof(size);
 119                         mp->m_offset = mailx_offsetof(size);
 120                         mp->m_lines = 0;
 121                         mp->m_flag |= MODIFY;
 122                         rewind(fp);
 123                         lastnl = 0;
 124                         size = 0;
 125                         while ((c = getc(fp)) != EOF) {
 126                                 if ((lastnl = c == '\n'))
 127                                         mp->m_lines++;
 128                                 if (putc(c, mb.mb_otf) == EOF)
 129                                         break;
 130                                 ++size;
 131                         }
 132                         if (! lastnl && putc('\n', mb.mb_otf) != EOF)
 133                                 ++size;
 134                         if (putc('\n', mb.mb_otf) != EOF)
 135                                 ++size;
 136                         mp->m_size = (size_t)size;
 137                         if (ferror(mb.mb_otf))
 138                                 perror("/tmp");
 139                         Fclose(fp);
 140                 }
 141                 safe_signal(SIGINT, sigint);
 142         }
 143         if (line)
 144                 free(line);
 145         return 0;
 146 }
 147
 148 /*
 149  * Run an editor on the file at "fpp" of "size" bytes,
 150  * and return a new file pointer.
 151  * Signals must be handled by the caller.
 152  * "viored" is 'e' for ed, 'v' for vi.
 153  */
 154 FL FILE *
 155 run_editor(FILE *fp, off_t size, int viored, int readonly,
 156                 struct header *hp, struct message *mp, enum sendaction action,
 157                 sighandler_type oldint)
 158 {
 159         FILE *nf = NULL;
 160         int t;
 161         time_t modtime;
 162         char const *ed;
 163         struct stat statb;
 164         char *tempEdit;
 165         sigset_t cset;
 166
 167         if ((nf = Ftemp(&tempEdit, "Re", "w", readonly ? 0400 : 0600, 1))
 168                         == NULL) {
 169                 perror(tr(73, "temporary mail edit file"));
 170                 goto out;
 171         }
 172         if (hp) {
 173                 t = GTO|GSUBJECT|GCC|GBCC|GNL|GCOMMA;
 174                 if (hp->h_from || hp->h_replyto || hp->h_sender ||
 175                                 hp->h_organization)
 176                         t |= GIDENT;
 177                 puthead(hp, nf, t, SEND_TODISP, CONV_NONE, NULL, NULL);
 178         }
 179         if (mp) {
 180                 sendmp(mp, nf, 0, NULL, action, NULL);
 181         } else {
 182                 if (size >= 0)
 183                         while (--size >= 0 && (t = getc(fp)) != EOF)
 184                                 putc(t, nf);
 185                 else
 186                         while ((t = getc(fp)) != EOF)
 187                                 putc(t, nf);
 188         }
 189         fflush(nf);
 190         if (fstat(fileno(nf), &statb) < 0)
 191                 modtime = 0;
 192         else
 193                 modtime = statb.st_mtime;
 194         if (ferror(nf)) {
 195                 Fclose(nf);
 196                 perror(tempEdit);
 197                 nf = NULL;
 198                 goto out;
 199         }
 200         if (Fclose(nf) < 0) {
 201                 perror(tempEdit);
 202                 nf = NULL;
 203                 goto out;
 204         }
 205         nf = NULL;
 206
 207         if ((ed = value(viored == 'e' ? "EDITOR" : "VISUAL")) == NULL)
 208                 ed = (viored == 'e') ? "ed" : "vi";
 209         sigemptyset(&cset);
 210         if (run_command(ed, oldint != SIG_IGN ? &cset : NULL, -1, -1,
 211                                 tempEdit, NULL, NULL) < 0)
 212                 goto out;
 213
 214         /*
 215          * If in read only mode or file unchanged, just remove the editor
 216          * temporary and return.  Otherwise switch to new file.
 217          */
 218         if (readonly)
 219                 goto out;
 220         if (stat(tempEdit, &statb) < 0) {
 221                 perror(tempEdit);
 222                 Ftfree(&tempEdit);
 223                 goto out;
 224         }
 225         if (modtime != statb.st_mtime && (nf = Fopen(tempEdit, "a+")) == NULL)
 226                 perror(tempEdit);
 227 out:
 228         if (tempEdit != NULL) {
 229                 unlink(tempEdit);
 230                 Ftfree(&tempEdit);
 231         }
 232         return nf;
 233 }