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4f4122db WJ |
1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | ||
34 | #ifndef lint | |
35 | static char sccsid[] = "@(#)edit.c 5.15 (Berkeley) 6/25/90"; | |
36 | #endif /* not lint */ | |
37 | ||
38 | #include "rcv.h" | |
39 | #include <sys/stat.h> | |
40 | ||
41 | /* | |
42 | * Mail -- a mail program | |
43 | * | |
44 | * Perform message editing functions. | |
45 | */ | |
46 | ||
47 | /* | |
48 | * Edit a message list. | |
49 | */ | |
50 | ||
51 | editor(msgvec) | |
52 | int *msgvec; | |
53 | { | |
54 | ||
55 | return edit1(msgvec, 'e'); | |
56 | } | |
57 | ||
58 | /* | |
59 | * Invoke the visual editor on a message list. | |
60 | */ | |
61 | ||
62 | visual(msgvec) | |
63 | int *msgvec; | |
64 | { | |
65 | ||
66 | return edit1(msgvec, 'v'); | |
67 | } | |
68 | ||
69 | /* | |
70 | * Edit a message by writing the message into a funnily-named file | |
71 | * (which should not exist) and forking an editor on it. | |
72 | * We get the editor from the stuff above. | |
73 | */ | |
74 | edit1(msgvec, type) | |
75 | int *msgvec; | |
76 | char type; | |
77 | { | |
78 | register int c; | |
79 | int i; | |
80 | FILE *fp; | |
81 | register struct message *mp; | |
82 | off_t size; | |
83 | ||
84 | /* | |
85 | * Deal with each message to be edited . . . | |
86 | */ | |
87 | for (i = 0; msgvec[i] && i < msgCount; i++) { | |
88 | sig_t sigint; | |
89 | ||
90 | if (i > 0) { | |
91 | char buf[100]; | |
92 | char *p; | |
93 | ||
94 | printf("Edit message %d [ynq]? ", msgvec[i]); | |
95 | if (fgets(buf, sizeof buf, stdin) == 0) | |
96 | break; | |
97 | for (p = buf; *p == ' ' || *p == '\t'; p++) | |
98 | ; | |
99 | if (*p == 'q') | |
100 | break; | |
101 | if (*p == 'n') | |
102 | continue; | |
103 | } | |
104 | dot = mp = &message[msgvec[i] - 1]; | |
105 | touch(mp); | |
106 | sigint = signal(SIGINT, SIG_IGN); | |
107 | fp = run_editor(setinput(mp), mp->m_size, type, readonly); | |
108 | if (fp != NULL) { | |
109 | (void) fseek(otf, (long) 0, 2); | |
110 | size = ftell(otf); | |
111 | mp->m_block = blockof(size); | |
112 | mp->m_offset = offsetof(size); | |
113 | mp->m_size = fsize(fp); | |
114 | mp->m_lines = 0; | |
115 | mp->m_flag |= MODIFY; | |
116 | rewind(fp); | |
117 | while ((c = getc(fp)) != EOF) { | |
118 | if (c == '\n') | |
119 | mp->m_lines++; | |
120 | if (putc(c, otf) == EOF) | |
121 | break; | |
122 | } | |
123 | if (ferror(otf)) | |
124 | perror("/tmp"); | |
125 | (void) Fclose(fp); | |
126 | } | |
127 | (void) signal(SIGINT, sigint); | |
128 | } | |
129 | return 0; | |
130 | } | |
131 | ||
132 | /* | |
133 | * Run an editor on the file at "fpp" of "size" bytes, | |
134 | * and return a new file pointer. | |
135 | * Signals must be handled by the caller. | |
136 | * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI. | |
137 | */ | |
138 | FILE * | |
139 | run_editor(fp, size, type, readonly) | |
140 | register FILE *fp; | |
141 | off_t size; | |
142 | char type; | |
143 | { | |
144 | register FILE *nf = NULL; | |
145 | register int t; | |
146 | time_t modtime; | |
147 | char *edit; | |
148 | struct stat statb; | |
149 | extern char tempEdit[]; | |
150 | ||
151 | if ((t = creat(tempEdit, readonly ? 0400 : 0600)) < 0) { | |
152 | perror(tempEdit); | |
153 | goto out; | |
154 | } | |
155 | if ((nf = Fdopen(t, "w")) == NULL) { | |
156 | perror(tempEdit); | |
157 | (void) unlink(tempEdit); | |
158 | goto out; | |
159 | } | |
160 | if (size >= 0) | |
161 | while (--size >= 0 && (t = getc(fp)) != EOF) | |
162 | (void) putc(t, nf); | |
163 | else | |
164 | while ((t = getc(fp)) != EOF) | |
165 | (void) putc(t, nf); | |
166 | (void) fflush(nf); | |
167 | if (fstat(fileno(nf), &statb) < 0) | |
168 | modtime = 0; | |
169 | else | |
170 | modtime = statb.st_mtime; | |
171 | if (ferror(nf)) { | |
172 | (void) Fclose(nf); | |
173 | perror(tempEdit); | |
174 | (void) unlink(tempEdit); | |
175 | nf = NULL; | |
176 | goto out; | |
177 | } | |
178 | if (Fclose(nf) < 0) { | |
179 | perror(tempEdit); | |
180 | (void) unlink(tempEdit); | |
181 | nf = NULL; | |
182 | goto out; | |
183 | } | |
184 | nf = NULL; | |
185 | if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NOSTR) | |
186 | edit = type == 'e' ? _PATH_EX : _PATH_VI; | |
187 | if (run_command(edit, 0, -1, -1, tempEdit, NOSTR) < 0) { | |
188 | (void) unlink(tempEdit); | |
189 | goto out; | |
190 | } | |
191 | /* | |
192 | * If in read only mode or file unchanged, just remove the editor | |
193 | * temporary and return. | |
194 | */ | |
195 | if (readonly) { | |
196 | (void) unlink(tempEdit); | |
197 | goto out; | |
198 | } | |
199 | if (stat(tempEdit, &statb) < 0) { | |
200 | perror(tempEdit); | |
201 | goto out; | |
202 | } | |
203 | if (modtime == statb.st_mtime) { | |
204 | (void) unlink(tempEdit); | |
205 | goto out; | |
206 | } | |
207 | /* | |
208 | * Now switch to new file. | |
209 | */ | |
210 | if ((nf = Fopen(tempEdit, "a+")) == NULL) { | |
211 | perror(tempEdit); | |
212 | (void) unlink(tempEdit); | |
213 | goto out; | |
214 | } | |
215 | (void) unlink(tempEdit); | |
216 | out: | |
217 | return nf; | |
218 | } |