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: stable/12/usr.bin/mail/edit.c 326025 2017-11-20 19:49:47Z pfg $");
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
editor(int * msgvec)54 editor(int *msgvec)
55 {
56
57 return (edit1(msgvec, 'e'));
58 }
59
60 /*
61 * Invoke the visual editor on a message list.
62 */
63 int
visual(int * msgvec)64 visual(int *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
edit1(int * msgvec,int type)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 *
run_editor(FILE * fp,off_t size,int type,int readonly)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