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 #include "rcv.h" 33 #include <fcntl.h> 34 #include "extern.h" 35 36 /* 37 * Mail -- a mail program 38 * 39 * Perform message editing functions. 40 */ 41 42 /* 43 * Edit a message list. 44 */ 45 int 46 editor(void *msgvec) 47 { 48 49 return (edit1(msgvec, 'e')); 50 } 51 52 /* 53 * Invoke the visual editor on a message list. 54 */ 55 int 56 visual(void *msgvec) 57 { 58 59 return (edit1(msgvec, 'v')); 60 } 61 62 /* 63 * Edit a message by writing the message into a funnily-named file 64 * (which should not exist) and forking an editor on it. 65 * We get the editor from the stuff above. 66 */ 67 int 68 edit1(int *msgvec, int type) 69 { 70 int c, i; 71 FILE *fp; 72 struct message *mp; 73 off_t size; 74 75 /* 76 * Deal with each message to be edited . . . 77 */ 78 for (i = 0; i < msgCount && msgvec[i]; i++) { 79 sig_t sigint; 80 81 if (i > 0) { 82 char buf[100]; 83 char *p; 84 85 printf("Edit message %d [ynq]? ", msgvec[i]); 86 if (fgets(buf, sizeof(buf), stdin) == NULL) 87 break; 88 for (p = buf; *p == ' ' || *p == '\t'; p++) 89 ; 90 if (*p == 'q') 91 break; 92 if (*p == 'n') 93 continue; 94 } 95 dot = mp = &message[msgvec[i] - 1]; 96 touch(mp); 97 sigint = signal(SIGINT, SIG_IGN); 98 fp = run_editor(setinput(mp), mp->m_size, type, readonly); 99 if (fp != NULL) { 100 (void)fseeko(otf, (off_t)0, SEEK_END); 101 size = ftello(otf); 102 mp->m_block = blockof(size); 103 mp->m_offset = boffsetof(size); 104 mp->m_size = (long)fsize(fp); 105 mp->m_lines = 0; 106 mp->m_flag |= MODIFY; 107 rewind(fp); 108 while ((c = getc(fp)) != EOF) { 109 if (c == '\n') 110 mp->m_lines++; 111 if (putc(c, otf) == EOF) 112 break; 113 } 114 if (ferror(otf)) 115 warnx("/tmp"); 116 (void)Fclose(fp); 117 } 118 (void)signal(SIGINT, sigint); 119 } 120 return (0); 121 } 122 123 /* 124 * Run an editor on the file at "fpp" of "size" bytes, 125 * and return a new file pointer. 126 * Signals must be handled by the caller. 127 * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI. 128 */ 129 FILE * 130 run_editor(FILE *fp, off_t size, int type, int readonly) 131 { 132 FILE *nf = NULL; 133 int t; 134 time_t modtime; 135 char *edit, tempname[PATHSIZE]; 136 struct stat statb; 137 138 (void)snprintf(tempname, sizeof(tempname), 139 "%s/mail.ReXXXXXXXXXX", tmpdir); 140 if ((t = mkstemp(tempname)) == -1 || 141 (nf = Fdopen(t, "w")) == NULL) { 142 warn("%s", tempname); 143 goto out; 144 } 145 if (readonly && fchmod(t, 0400) == -1) { 146 warn("%s", tempname); 147 (void)rm(tempname); 148 goto out; 149 } 150 if (size >= 0) 151 while (--size >= 0 && (t = getc(fp)) != EOF) 152 (void)putc(t, nf); 153 else 154 while ((t = getc(fp)) != EOF) 155 (void)putc(t, nf); 156 (void)fflush(nf); 157 if (fstat(fileno(nf), &statb) < 0) 158 modtime = 0; 159 else 160 modtime = statb.st_mtime; 161 if (ferror(nf)) { 162 (void)Fclose(nf); 163 warnx("%s", tempname); 164 (void)rm(tempname); 165 nf = NULL; 166 goto out; 167 } 168 if (Fclose(nf) < 0) { 169 warn("%s", tempname); 170 (void)rm(tempname); 171 nf = NULL; 172 goto out; 173 } 174 nf = NULL; 175 if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NULL) 176 edit = type == 'e' ? _PATH_EX : _PATH_VI; 177 if (run_command(edit, 0, -1, -1, tempname, NULL) < 0) { 178 (void)rm(tempname); 179 goto out; 180 } 181 /* 182 * If in read only mode or file unchanged, just remove the editor 183 * temporary and return. 184 */ 185 if (readonly) { 186 (void)rm(tempname); 187 goto out; 188 } 189 if (stat(tempname, &statb) < 0) { 190 warn("%s", tempname); 191 goto out; 192 } 193 if (modtime == statb.st_mtime) { 194 (void)rm(tempname); 195 goto out; 196 } 197 /* 198 * Now switch to new file. 199 */ 200 if ((nf = Fopen(tempname, "a+")) == NULL) { 201 warn("%s", tempname); 202 (void)rm(tempname); 203 goto out; 204 } 205 (void)rm(tempname); 206 out: 207 return (nf); 208 } 209