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