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 - 2015 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. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35 #undef n_FILE
  36 #define n_FILE edit
  37
  38 #ifndef HAVE_AMALGAMATION
  39 # include "nail.h"
  40 #endif
  41
  42 /* Edit a message by writing the message into a funnily-named file (which
  43  * should not exist) and forking an editor on it */
  44 static int edit1(int *msgvec, int viored);
  45
  46 static int
  47 edit1(int *msgvec, int viored)
  48 {
  49    int c, i;
  50    FILE *fp = NULL;
  51    struct message *mp;
  52    off_t size;
  53    bool_t wb, lastnl;
  54    char *line = NULL; /* TODO line pool */
  55    size_t linesize = 0;
  56    NYD_ENTER;
  57
  58    wb = ok_blook(writebackedited);
  59
  60    /* Deal with each message to be edited... */
  61    for (i = 0; msgvec[i] != 0 && i < msgCount; ++i) {
  62       sighandler_type sigint;
  63
  64       if (i > 0) { /* TODO getapproval(): return APPROV_{YES,NO,QUIT}: USE! */
  65          char *p;
  66
  67          printf(_("Edit message %d [ynq]? "), msgvec[i]);
  68          fflush(stdout);
  69          if (readline_restart(stdin, &line, &linesize, 0) < 0)
  70             break;
  71          for (p = line; blankchar(*p); ++p)
  72             ;
  73          if (*p == 'q')
  74             break;
  75          if (*p == 'n')
  76             continue;
  77       }
  78       mp = message + msgvec[i] - 1;
  79       setdot(mp);
  80       pstate |= PS_DID_PRINT_DOT;
  81       touch(mp);
  82
  83       sigint = safe_signal(SIGINT, SIG_IGN);
  84
  85       --mp->m_size; /* Strip final NL.. TODO MAILVFS->MESSAGE->length() */
  86       fp = run_editor(fp, -1/*mp->m_size TODO */, viored,
  87             ((mb.mb_perm & MB_EDIT) == 0 || !wb), NULL, mp,
  88             (wb ? SEND_MBOX : SEND_TODISP_ALL), sigint);
  89       ++mp->m_size; /* And readd it TODO */
  90
  91       if (fp != NULL) {
  92          fseek(mb.mb_otf, 0L, SEEK_END);
  93          size = ftell(mb.mb_otf);
  94          mp->m_block = mailx_blockof(size);
  95          mp->m_offset = mailx_offsetof(size);
  96          mp->m_lines = 0;
  97          mp->m_flag |= MODIFY;
  98          rewind(fp);
  99          lastnl = 0;
 100          size = 0;
 101          while ((c = getc(fp)) != EOF) {
 102             if ((lastnl = (c == '\n')))
 103                ++mp->m_lines;
 104             if (putc(c, mb.mb_otf) == EOF)
 105                break;
 106             ++size;
 107          }
 108          if (!lastnl && putc('\n', mb.mb_otf) != EOF)
 109             ++size;
 110          if (putc('\n', mb.mb_otf) != EOF)
 111             ++size;
 112          mp->m_size = (size_t)size;
 113          if (ferror(mb.mb_otf))
 114             n_perr(_("/tmp"), 0);
 115          Fclose(fp);
 116       }
 117
 118       safe_signal(SIGINT, sigint);
 119    }
 120
 121    if (line != NULL)
 122       free(line);
 123    NYD_LEAVE;
 124    return 0;
 125 }
 126
 127 FL int
 128 c_editor(void *v)
 129 {
 130    int *msgvec = v, rv;
 131    NYD_ENTER;
 132
 133    rv = edit1(msgvec, 'e');
 134    NYD_LEAVE;
 135    return rv;
 136 }
 137
 138 FL int
 139 c_visual(void *v)
 140 {
 141    int *msgvec = v, rv;
 142    NYD_ENTER;
 143
 144    rv = edit1(msgvec, 'v');
 145    NYD_LEAVE;
 146    return rv;
 147 }
 148
 149 FL FILE *
 150 run_editor(FILE *fp, off_t size, int viored, int readonly, struct header *hp,
 151    struct message *mp, enum sendaction action, sighandler_type oldint)
 152 {
 153    struct stat statb;
 154    sigset_t cset;
 155    FILE *nf = NULL;
 156    int t;
 157    time_t modtime;
 158    off_t modsize;
 159    char const *ed;
 160    char *tempEdit;
 161    NYD_ENTER;
 162
 163    if ((nf = Ftmp(&tempEdit, "runed", OF_WRONLY | OF_REGISTER)) == NULL) {
 164       n_perr(_("temporary mail edit file"), 0);
 165       goto jleave;
 166    }
 167
 168    if (hp != NULL) {
 169       assert(mp == NULL);
 170       t = GTO | GSUBJECT | GCC | GBCC | GNL | GCOMMA;
 171       if ((hp->h_from != NULL || myaddrs(hp) != NULL) ||
 172             (hp->h_sender != NULL || ok_vlook(sender) != NULL) ||
 173             (hp->h_replyto != NULL || ok_vlook(replyto) != NULL) ||
 174             hp->h_list_post != NULL || (hp->h_flags & HF_LIST_REPLY))
 175          t |= GIDENT;
 176       puthead(TRUM1, hp, nf, t, SEND_TODISP, CONV_NONE, NULL, NULL);
 177    }
 178
 179    if (mp != NULL) {
 180       if (sendmp(mp, nf, 0, NULL, action, NULL) < 0) {
 181          n_err(_("Failed to prepare editable message\n"));
 182          goto jleave;
 183       }
 184    } else {
 185       if (size >= 0)
 186          while (--size >= 0 && (t = getc(fp)) != EOF)
 187             putc(t, nf);
 188       else
 189          while ((t = getc(fp)) != EOF)
 190             putc(t, nf);
 191    }
 192
 193    fflush(nf);
 194    if ((t = ferror(nf)) == 0) {
 195       if (fstat(fileno(nf), &statb) == -1)
 196          modtime = 0, modsize = 0;
 197       else
 198          modtime = statb.st_mtime, modsize = statb.st_size;
 199
 200       if (readonly)
 201          t = (fchmod(fileno(nf), S_IRUSR) != 0);
 202    }
 203
 204    if (Fclose(nf) < 0 || t != 0) {
 205       n_perr(tempEdit, 0);
 206       t = 1;
 207    }
 208    nf = NULL;
 209    if (t != 0)
 210       goto jleave;
 211
 212    ed = (viored == 'e') ? ok_vlook(EDITOR) : ok_vlook(VISUAL);
 213    if (ed == NULL)
 214       ed = (viored == 'e') ? "ed" : "vi"; /* XXX no magics, -> nail.h */
 215
 216    sigemptyset(&cset);
 217    if (run_command(ed, (oldint != SIG_IGN ? &cset : NULL),
 218          COMMAND_FD_PASS, COMMAND_FD_PASS, tempEdit, NULL, NULL, NULL) < 0)
 219       goto jleave;
 220
 221    /* If in read only mode or file unchanged, just remove the editor temporary
 222     * and return.  Otherwise switch to new file */
 223    if (readonly)
 224       goto jleave;
 225    if (stat(tempEdit, &statb) == -1) {
 226       n_perr(tempEdit, 0);
 227       goto jleave;
 228    }
 229
 230    if ((modtime != statb.st_mtime || modsize != statb.st_size) &&
 231          (nf = Fopen(tempEdit, "a+")) == NULL)
 232       n_perr(tempEdit, 0);
 233 jleave:
 234    if (tempEdit != NULL) { /* TODO i'd rather do more signal handling */
 235       unlink(tempEdit);    /* TODO in here */
 236       Ftmp_free(&tempEdit);
 237    }
 238    NYD_LEAVE;
 239    return nf;
 240 }
 241
 242 /* s-it-mode */