1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 #if 0 34 static char sccsid[] = "@(#)edit.c 8.1 (Berkeley) 6/6/93"; 35 #endif 36 #endif /* not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include "rcv.h" 41 #include <fcntl.h> 42 #include "extern.h" 43 44 /* 45 * Mail -- a mail program 46 * 47 * Perform message editing functions. 48 */ 49 50 /* 51 * Edit a message list. 52 */ 53 int 54 editor(void *msgvec) 55 { 56 57 return (edit1(msgvec, 'e')); 58 } 59 60 /* 61 * Invoke the visual editor on a message list. 62 */ 63 int 64 visual(void *msgvec) 65 { 66 67 return (edit1(msgvec, 'v')); 68 } 69 70 /* 71 * Edit a message by writing the message into a funnily-named file 72 * (which should not exist) and forking an editor on it. 73 * We get the editor from the stuff above. 74 */ 75 int 76 edit1(int *msgvec, int type) 77 { 78 int c, i; 79 FILE *fp; 80 struct message *mp; 81 off_t size; 82 83 /* 84 * Deal with each message to be edited . . . 85 */ 86 for (i = 0; i < msgCount && msgvec[i]; i++) { 87 sig_t sigint; 88 89 if (i > 0) { 90 char buf[100]; 91 char *p; 92 93 printf("Edit message %d [ynq]? ", msgvec[i]); 94 if (fgets(buf, sizeof(buf), stdin) == NULL) 95 break; 96 for (p = buf; *p == ' ' || *p == '\t'; p++) 97 ; 98 if (*p == 'q') 99 break; 100 if (*p == 'n') 101 continue; 102 } 103 dot = mp = &message[msgvec[i] - 1]; 104 touch(mp); 105 sigint = signal(SIGINT, SIG_IGN); 106 fp = run_editor(setinput(mp), mp->m_size, type, readonly); 107 if (fp != NULL) { 108 (void)fseeko(otf, (off_t)0, SEEK_END); 109 size = ftello(otf); 110 mp->m_block = blockof(size); 111 mp->m_offset = boffsetof(size); 112 mp->m_size = (long)fsize(fp); 113 mp->m_lines = 0; 114 mp->m_flag |= MODIFY; 115 rewind(fp); 116 while ((c = getc(fp)) != EOF) { 117 if (c == '\n') 118 mp->m_lines++; 119 if (putc(c, otf) == EOF) 120 break; 121 } 122 if (ferror(otf)) 123 warnx("/tmp"); 124 (void)Fclose(fp); 125 } 126 (void)signal(SIGINT, sigint); 127 } 128 return (0); 129 } 130 131 /* 132 * Run an editor on the file at "fpp" of "size" bytes, 133 * and return a new file pointer. 134 * Signals must be handled by the caller. 135 * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI. 136 */ 137 FILE * 138 run_editor(FILE *fp, off_t size, int type, int readonly) 139 { 140 FILE *nf = NULL; 141 int t; 142 time_t modtime; 143 char *edit, tempname[PATHSIZE]; 144 struct stat statb; 145 146 (void)snprintf(tempname, sizeof(tempname), 147 "%s/mail.ReXXXXXXXXXX", tmpdir); 148 if ((t = mkstemp(tempname)) == -1 || 149 (nf = Fdopen(t, "w")) == NULL) { 150 warn("%s", tempname); 151 goto out; 152 } 153 if (readonly && fchmod(t, 0400) == -1) { 154 warn("%s", tempname); 155 (void)rm(tempname); 156 goto out; 157 } 158 if (size >= 0) 159 while (--size >= 0 && (t = getc(fp)) != EOF) 160 (void)putc(t, nf); 161 else 162 while ((t = getc(fp)) != EOF) 163 (void)putc(t, nf); 164 (void)fflush(nf); 165 if (fstat(fileno(nf), &statb) < 0) 166 modtime = 0; 167 else 168 modtime = statb.st_mtime; 169 if (ferror(nf)) { 170 (void)Fclose(nf); 171 warnx("%s", tempname); 172 (void)rm(tempname); 173 nf = NULL; 174 goto out; 175 } 176 if (Fclose(nf) < 0) { 177 warn("%s", tempname); 178 (void)rm(tempname); 179 nf = NULL; 180 goto out; 181 } 182 nf = NULL; 183 if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NULL) 184 edit = type == 'e' ? _PATH_EX : _PATH_VI; 185 if (run_command(edit, 0, -1, -1, tempname, NULL) < 0) { 186 (void)rm(tempname); 187 goto out; 188 } 189 /* 190 * If in read only mode or file unchanged, just remove the editor 191 * temporary and return. 192 */ 193 if (readonly) { 194 (void)rm(tempname); 195 goto out; 196 } 197 if (stat(tempname, &statb) < 0) { 198 warn("%s", tempname); 199 goto out; 200 } 201 if (modtime == statb.st_mtime) { 202 (void)rm(tempname); 203 goto out; 204 } 205 /* 206 * Now switch to new file. 207 */ 208 if ((nf = Fopen(tempname, "a+")) == NULL) { 209 warn("%s", tempname); 210 (void)rm(tempname); 211 goto out; 212 } 213 (void)rm(tempname); 214 out: 215 return (nf); 216 } 217