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 #include "rcv.h" 39 #include <fcntl.h> 40 #include "extern.h" 41 42 /* 43 * Mail -- a mail program 44 * 45 * Perform message editing functions. 46 */ 47 48 /* 49 * Edit a message list. 50 */ 51 int 52 editor(void *msgvec) 53 { 54 55 return (edit1(msgvec, 'e')); 56 } 57 58 /* 59 * Invoke the visual editor on a message list. 60 */ 61 int 62 visual(void *msgvec) 63 { 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 int 74 edit1(int *msgvec, int type) 75 { 76 int c, i; 77 FILE *fp; 78 struct message *mp; 79 off_t size; 80 81 /* 82 * Deal with each message to be edited . . . 83 */ 84 for (i = 0; i < msgCount && msgvec[i]; i++) { 85 sig_t sigint; 86 87 if (i > 0) { 88 char buf[100]; 89 char *p; 90 91 printf("Edit message %d [ynq]? ", msgvec[i]); 92 if (fgets(buf, sizeof(buf), stdin) == NULL) 93 break; 94 for (p = buf; *p == ' ' || *p == '\t'; p++) 95 ; 96 if (*p == 'q') 97 break; 98 if (*p == 'n') 99 continue; 100 } 101 dot = mp = &message[msgvec[i] - 1]; 102 touch(mp); 103 sigint = signal(SIGINT, SIG_IGN); 104 fp = run_editor(setinput(mp), mp->m_size, type, readonly); 105 if (fp != NULL) { 106 (void)fseeko(otf, (off_t)0, SEEK_END); 107 size = ftello(otf); 108 mp->m_block = blockof(size); 109 mp->m_offset = boffsetof(size); 110 mp->m_size = (long)fsize(fp); 111 mp->m_lines = 0; 112 mp->m_flag |= MODIFY; 113 rewind(fp); 114 while ((c = getc(fp)) != EOF) { 115 if (c == '\n') 116 mp->m_lines++; 117 if (putc(c, otf) == EOF) 118 break; 119 } 120 if (ferror(otf)) 121 warnx("/tmp"); 122 (void)Fclose(fp); 123 } 124 (void)signal(SIGINT, sigint); 125 } 126 return (0); 127 } 128 129 /* 130 * Run an editor on the file at "fpp" of "size" bytes, 131 * and return a new file pointer. 132 * Signals must be handled by the caller. 133 * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI. 134 */ 135 FILE * 136 run_editor(FILE *fp, off_t size, int type, int readonly) 137 { 138 FILE *nf = NULL; 139 int t; 140 time_t modtime; 141 char *edit, tempname[PATHSIZE]; 142 struct stat statb; 143 144 (void)snprintf(tempname, sizeof(tempname), 145 "%s/mail.ReXXXXXXXXXX", tmpdir); 146 if ((t = mkstemp(tempname)) == -1 || 147 (nf = Fdopen(t, "w")) == NULL) { 148 warn("%s", tempname); 149 goto out; 150 } 151 if (readonly && fchmod(t, 0400) == -1) { 152 warn("%s", tempname); 153 (void)rm(tempname); 154 goto out; 155 } 156 if (size >= 0) 157 while (--size >= 0 && (t = getc(fp)) != EOF) 158 (void)putc(t, nf); 159 else 160 while ((t = getc(fp)) != EOF) 161 (void)putc(t, nf); 162 (void)fflush(nf); 163 if (fstat(fileno(nf), &statb) < 0) 164 modtime = 0; 165 else 166 modtime = statb.st_mtime; 167 if (ferror(nf)) { 168 (void)Fclose(nf); 169 warnx("%s", tempname); 170 (void)rm(tempname); 171 nf = NULL; 172 goto out; 173 } 174 if (Fclose(nf) < 0) { 175 warn("%s", tempname); 176 (void)rm(tempname); 177 nf = NULL; 178 goto out; 179 } 180 nf = NULL; 181 if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NULL) 182 edit = type == 'e' ? _PATH_EX : _PATH_VI; 183 if (run_command(edit, 0, -1, -1, tempname, NULL) < 0) { 184 (void)rm(tempname); 185 goto out; 186 } 187 /* 188 * If in read only mode or file unchanged, just remove the editor 189 * temporary and return. 190 */ 191 if (readonly) { 192 (void)rm(tempname); 193 goto out; 194 } 195 if (stat(tempname, &statb) < 0) { 196 warn("%s", tempname); 197 goto out; 198 } 199 if (modtime == statb.st_mtime) { 200 (void)rm(tempname); 201 goto out; 202 } 203 /* 204 * Now switch to new file. 205 */ 206 if ((nf = Fopen(tempname, "a+")) == NULL) { 207 warn("%s", tempname); 208 (void)rm(tempname); 209 goto out; 210 } 211 (void)rm(tempname); 212 out: 213 return (nf); 214 } 215