edit.c revision 74769
1/* 2 * Copyright (c) 1980, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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 * $FreeBSD: head/usr.bin/mail/edit.c 74769 2001-03-25 04:57:05Z mikeh $ 34 */ 35 36#ifndef lint 37#if 0 38static char sccsid[] = "@(#)edit.c 8.1 (Berkeley) 6/6/93"; 39#endif 40static const char rcsid[] = 41 "$FreeBSD: head/usr.bin/mail/edit.c 74769 2001-03-25 04:57:05Z mikeh $"; 42#endif /* not lint */ 43 44#include "rcv.h" 45#include <fcntl.h> 46#include "extern.h" 47 48/* 49 * Mail -- a mail program 50 * 51 * Perform message editing functions. 52 */ 53 54/* 55 * Edit a message list. 56 */ 57int 58editor(msgvec) 59 int *msgvec; 60{ 61 62 return edit1(msgvec, 'e'); 63} 64 65/* 66 * Invoke the visual editor on a message list. 67 */ 68int 69visual(msgvec) 70 int *msgvec; 71{ 72 73 return edit1(msgvec, 'v'); 74} 75 76/* 77 * Edit a message by writing the message into a funnily-named file 78 * (which should not exist) and forking an editor on it. 79 * We get the editor from the stuff above. 80 */ 81int 82edit1(msgvec, type) 83 int *msgvec; 84 int type; 85{ 86 register int c; 87 int i; 88 FILE *fp; 89 register struct message *mp; 90 off_t size; 91 92 /* 93 * Deal with each message to be edited . . . 94 */ 95 for (i = 0; msgvec[i] && i < msgCount; i++) { 96 sig_t sigint; 97 98 if (i > 0) { 99 char buf[100]; 100 char *p; 101 102 printf("Edit message %d [ynq]? ", msgvec[i]); 103 if (fgets(buf, sizeof buf, stdin) == 0) 104 break; 105 for (p = buf; *p == ' ' || *p == '\t'; p++) 106 ; 107 if (*p == 'q') 108 break; 109 if (*p == 'n') 110 continue; 111 } 112 dot = mp = &message[msgvec[i] - 1]; 113 touch(mp); 114 sigint = signal(SIGINT, SIG_IGN); 115 fp = run_editor(setinput(mp), mp->m_size, type, readonly); 116 if (fp != NULL) { 117 (void) fseek(otf, 0L, 2); 118 size = ftell(otf); 119 mp->m_block = blockof(size); 120 mp->m_offset = boffsetof(size); 121 mp->m_size = fsize(fp); 122 mp->m_lines = 0; 123 mp->m_flag |= MODIFY; 124 rewind(fp); 125 while ((c = getc(fp)) != EOF) { 126 if (c == '\n') 127 mp->m_lines++; 128 if (putc(c, otf) == EOF) 129 break; 130 } 131 if (ferror(otf)) 132 warnx("/tmp"); 133 (void) Fclose(fp); 134 } 135 (void) signal(SIGINT, sigint); 136 } 137 return 0; 138} 139 140/* 141 * Run an editor on the file at "fpp" of "size" bytes, 142 * and return a new file pointer. 143 * Signals must be handled by the caller. 144 * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI. 145 */ 146FILE * 147run_editor(fp, size, type, readonly) 148 register FILE *fp; 149 off_t size; 150 int type, readonly; 151{ 152 register FILE *nf = NULL; 153 register int t; 154 time_t modtime; 155 char *edit, tempname[PATHSIZE]; 156 struct stat statb; 157 158 snprintf(tempname, sizeof(tempname), "%s/mail.ReXXXXXXXXXX", tmpdir); 159 if ((t = mkstemp(tempname)) == -1 || 160 (nf = Fdopen(t, "w")) == NULL) { 161 warn("%s", tempname); 162 goto out; 163 } 164 if (readonly && fchmod(t, 0400) == -1) { 165 warn("%s", tempname); 166 (void) rm(tempname); 167 goto out; 168 } 169 if (size >= 0) 170 while (--size >= 0 && (t = getc(fp)) != EOF) 171 (void) putc(t, nf); 172 else 173 while ((t = getc(fp)) != EOF) 174 (void) putc(t, nf); 175 (void) fflush(nf); 176 if (fstat(fileno(nf), &statb) < 0) 177 modtime = 0; 178 else 179 modtime = statb.st_mtime; 180 if (ferror(nf)) { 181 (void) Fclose(nf); 182 warnx("%s", tempname); 183 (void) rm(tempname); 184 nf = NULL; 185 goto out; 186 } 187 if (Fclose(nf) < 0) { 188 warn("%s", tempname); 189 (void) rm(tempname); 190 nf = NULL; 191 goto out; 192 } 193 nf = NULL; 194 if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NOSTR) 195 edit = type == 'e' ? _PATH_EX : _PATH_VI; 196 if (run_command(edit, 0, -1, -1, tempname, NOSTR, NOSTR) < 0) { 197 (void) rm(tempname); 198 goto out; 199 } 200 /* 201 * If in read only mode or file unchanged, just remove the editor 202 * temporary and return. 203 */ 204 if (readonly) { 205 (void) rm(tempname); 206 goto out; 207 } 208 if (stat(tempname, &statb) < 0) { 209 warn("%s", tempname); 210 goto out; 211 } 212 if (modtime == statb.st_mtime) { 213 (void) rm(tempname); 214 goto out; 215 } 216 /* 217 * Now switch to new file. 218 */ 219 if ((nf = Fopen(tempname, "a+")) == NULL) { 220 warn("%s", tempname); 221 (void) rm(tempname); 222 goto out; 223 } 224 (void) rm(tempname); 225out: 226 return nf; 227} 228