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
editor(void * msgvec)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
visual(void * msgvec)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
edit1(int * msgvec,int type)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 *
run_editor(FILE * fp,off_t size,int type,int readonly)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