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 #endif /* not lint */ 34 #include <sys/cdefs.h> 35 #include "rcv.h" 36 #include <fcntl.h> 37 #include "extern.h" 38 39 /* 40 * Mail -- a mail program 41 * 42 * Perform message editing functions. 43 */ 44 45 /* 46 * Edit a message list. 47 */ 48 int 49 editor(void *msgvec) 50 { 51 52 return (edit1(msgvec, 'e')); 53 } 54 55 /* 56 * Invoke the visual editor on a message list. 57 */ 58 int 59 visual(void *msgvec) 60 { 61 62 return (edit1(msgvec, 'v')); 63 } 64 65 /* 66 * Edit a message by writing the message into a funnily-named file 67 * (which should not exist) and forking an editor on it. 68 * We get the editor from the stuff above. 69 */ 70 int 71 edit1(int *msgvec, int type) 72 { 73 int c, i; 74 FILE *fp; 75 struct message *mp; 76 off_t size; 77 78 /* 79 * Deal with each message to be edited . . . 80 */ 81 for (i = 0; i < msgCount && msgvec[i]; i++) { 82 sig_t sigint; 83 84 if (i > 0) { 85 char buf[100]; 86 char *p; 87 88 printf("Edit message %d [ynq]? ", msgvec[i]); 89 if (fgets(buf, sizeof(buf), stdin) == NULL) 90 break; 91 for (p = buf; *p == ' ' || *p == '\t'; p++) 92 ; 93 if (*p == 'q') 94 break; 95 if (*p == 'n') 96 continue; 97 } 98 dot = mp = &message[msgvec[i] - 1]; 99 touch(mp); 100 sigint = signal(SIGINT, SIG_IGN); 101 fp = run_editor(setinput(mp), mp->m_size, type, readonly); 102 if (fp != NULL) { 103 (void)fseeko(otf, (off_t)0, SEEK_END); 104 size = ftello(otf); 105 mp->m_block = blockof(size); 106 mp->m_offset = boffsetof(size); 107 mp->m_size = (long)fsize(fp); 108 mp->m_lines = 0; 109 mp->m_flag |= MODIFY; 110 rewind(fp); 111 while ((c = getc(fp)) != EOF) { 112 if (c == '\n') 113 mp->m_lines++; 114 if (putc(c, otf) == EOF) 115 break; 116 } 117 if (ferror(otf)) 118 warnx("/tmp"); 119 (void)Fclose(fp); 120 } 121 (void)signal(SIGINT, sigint); 122 } 123 return (0); 124 } 125 126 /* 127 * Run an editor on the file at "fpp" of "size" bytes, 128 * and return a new file pointer. 129 * Signals must be handled by the caller. 130 * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI. 131 */ 132 FILE * 133 run_editor(FILE *fp, off_t size, int type, int readonly) 134 { 135 FILE *nf = NULL; 136 int t; 137 time_t modtime; 138 char *edit, tempname[PATHSIZE]; 139 struct stat statb; 140 141 (void)snprintf(tempname, sizeof(tempname), 142 "%s/mail.ReXXXXXXXXXX", tmpdir); 143 if ((t = mkstemp(tempname)) == -1 || 144 (nf = Fdopen(t, "w")) == NULL) { 145 warn("%s", tempname); 146 goto out; 147 } 148 if (readonly && fchmod(t, 0400) == -1) { 149 warn("%s", tempname); 150 (void)rm(tempname); 151 goto out; 152 } 153 if (size >= 0) 154 while (--size >= 0 && (t = getc(fp)) != EOF) 155 (void)putc(t, nf); 156 else 157 while ((t = getc(fp)) != EOF) 158 (void)putc(t, nf); 159 (void)fflush(nf); 160 if (fstat(fileno(nf), &statb) < 0) 161 modtime = 0; 162 else 163 modtime = statb.st_mtime; 164 if (ferror(nf)) { 165 (void)Fclose(nf); 166 warnx("%s", tempname); 167 (void)rm(tempname); 168 nf = NULL; 169 goto out; 170 } 171 if (Fclose(nf) < 0) { 172 warn("%s", tempname); 173 (void)rm(tempname); 174 nf = NULL; 175 goto out; 176 } 177 nf = NULL; 178 if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NULL) 179 edit = type == 'e' ? _PATH_EX : _PATH_VI; 180 if (run_command(edit, 0, -1, -1, tempname, NULL) < 0) { 181 (void)rm(tempname); 182 goto out; 183 } 184 /* 185 * If in read only mode or file unchanged, just remove the editor 186 * temporary and return. 187 */ 188 if (readonly) { 189 (void)rm(tempname); 190 goto out; 191 } 192 if (stat(tempname, &statb) < 0) { 193 warn("%s", tempname); 194 goto out; 195 } 196 if (modtime == statb.st_mtime) { 197 (void)rm(tempname); 198 goto out; 199 } 200 /* 201 * Now switch to new file. 202 */ 203 if ((nf = Fopen(tempname, "a+")) == NULL) { 204 warn("%s", tempname); 205 (void)rm(tempname); 206 goto out; 207 } 208 (void)rm(tempname); 209 out: 210 return (nf); 211 } 212