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1.3 ! millert 1: /* $OpenBSD: fio.c,v 1.2 1996/06/11 12:53:39 deraadt Exp $ */
1.2 deraadt 2: /* $NetBSD: fio.c,v 1.5 1996/06/08 19:48:22 christos Exp $ */
3:
1.1 deraadt 4: /*
5: * Copyright (c) 1980, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: * 3. All advertising materials mentioning features or use of this software
17: * must display the following acknowledgement:
18: * This product includes software developed by the University of
19: * California, Berkeley and its contributors.
20: * 4. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: */
36:
37: #ifndef lint
1.2 deraadt 38: #if 0
39: static char sccsid[] = "@(#)fio.c 8.1 (Berkeley) 6/6/93";
40: #else
1.3 ! millert 41: static char rcsid[] = "$OpenBSD: fio.c,v 1.2 1996/06/11 12:53:39 deraadt Exp $";
1.2 deraadt 42: #endif
1.1 deraadt 43: #endif /* not lint */
44:
45: #include "rcv.h"
46: #include <sys/file.h>
47: #include <sys/wait.h>
48:
49: #include <unistd.h>
50: #include <paths.h>
51: #include <errno.h>
52: #include "extern.h"
53:
54: /*
55: * Mail -- a mail program
56: *
57: * File I/O.
58: */
59:
60: /*
61: * Set up the input pointers while copying the mail file into /tmp.
62: */
63: void
64: setptr(ibuf)
65: register FILE *ibuf;
66: {
67: extern char *tmpdir;
68: register int c, count;
69: register char *cp, *cp2;
70: struct message this;
71: FILE *mestmp;
72: off_t offset;
73: int maybe, inhead;
74: char linebuf[LINESIZE];
75:
76: /* Get temporary file. */
77: (void)sprintf(linebuf, "%s/mail.XXXXXX", tmpdir);
78: if ((c = mkstemp(linebuf)) == -1 ||
79: (mestmp = Fdopen(c, "r+")) == NULL) {
80: (void)fprintf(stderr, "mail: can't open %s\n", linebuf);
81: exit(1);
82: }
83: (void)unlink(linebuf);
84:
85: msgCount = 0;
86: maybe = 1;
87: inhead = 0;
88: offset = 0;
89: this.m_flag = MUSED|MNEW;
90: this.m_size = 0;
91: this.m_lines = 0;
92: this.m_block = 0;
93: this.m_offset = 0;
94: for (;;) {
95: if (fgets(linebuf, LINESIZE, ibuf) == NULL) {
96: if (append(&this, mestmp)) {
97: perror("temporary file");
98: exit(1);
99: }
100: makemessage(mestmp);
101: return;
102: }
103: count = strlen(linebuf);
104: (void) fwrite(linebuf, sizeof *linebuf, count, otf);
105: if (ferror(otf)) {
106: perror("/tmp");
107: exit(1);
108: }
109: linebuf[count - 1] = 0;
110: if (maybe && linebuf[0] == 'F' && ishead(linebuf)) {
111: msgCount++;
112: if (append(&this, mestmp)) {
113: perror("temporary file");
114: exit(1);
115: }
116: this.m_flag = MUSED|MNEW;
117: this.m_size = 0;
118: this.m_lines = 0;
119: this.m_block = blockof(offset);
120: this.m_offset = offsetof(offset);
121: inhead = 1;
122: } else if (linebuf[0] == 0) {
123: inhead = 0;
124: } else if (inhead) {
125: for (cp = linebuf, cp2 = "status";; cp++) {
126: if ((c = *cp2++) == 0) {
127: while (isspace(*cp++))
128: ;
129: if (cp[-1] != ':')
130: break;
1.2 deraadt 131: while ((c = *cp++) != '\0')
1.1 deraadt 132: if (c == 'R')
133: this.m_flag |= MREAD;
134: else if (c == 'O')
135: this.m_flag &= ~MNEW;
136: inhead = 0;
137: break;
138: }
139: if (*cp != c && *cp != toupper(c))
140: break;
141: }
142: }
143: offset += count;
144: this.m_size += count;
145: this.m_lines++;
146: maybe = linebuf[0] == 0;
147: }
148: }
149:
150: /*
151: * Drop the passed line onto the passed output buffer.
152: * If a write error occurs, return -1, else the count of
153: * characters written, including the newline.
154: */
155: int
156: putline(obuf, linebuf)
157: FILE *obuf;
158: char *linebuf;
159: {
160: register int c;
161:
162: c = strlen(linebuf);
163: (void) fwrite(linebuf, sizeof *linebuf, c, obuf);
164: (void) putc('\n', obuf);
165: if (ferror(obuf))
166: return (-1);
167: return (c + 1);
168: }
169:
170: /*
171: * Read up a line from the specified input into the line
172: * buffer. Return the number of characters read. Do not
173: * include the newline at the end.
174: */
175: int
176: readline(ibuf, linebuf, linesize)
177: FILE *ibuf;
178: char *linebuf;
179: int linesize;
180: {
181: register int n;
182:
183: clearerr(ibuf);
184: if (fgets(linebuf, linesize, ibuf) == NULL)
185: return -1;
186: n = strlen(linebuf);
187: if (n > 0 && linebuf[n - 1] == '\n')
188: linebuf[--n] = '\0';
189: return n;
190: }
191:
192: /*
193: * Return a file buffer all ready to read up the
194: * passed message pointer.
195: */
196: FILE *
197: setinput(mp)
198: register struct message *mp;
199: {
200:
201: fflush(otf);
202: if (fseek(itf, (long)positionof(mp->m_block, mp->m_offset), 0) < 0) {
203: perror("fseek");
204: panic("temporary file seek");
205: }
206: return (itf);
207: }
208:
209: /*
210: * Take the data out of the passed ghost file and toss it into
211: * a dynamically allocated message structure.
212: */
213: void
214: makemessage(f)
215: FILE *f;
216: {
217: register size = (msgCount + 1) * sizeof (struct message);
218:
219: if (message != 0)
220: free((char *) message);
221: if ((message = (struct message *) malloc((unsigned) size)) == 0)
222: panic("Insufficient memory for %d messages", msgCount);
223: dot = message;
224: size -= sizeof (struct message);
225: fflush(f);
226: (void) lseek(fileno(f), (off_t)sizeof *message, 0);
227: if (read(fileno(f), (char *) message, size) != size)
228: panic("Message temporary file corrupted");
229: message[msgCount].m_size = 0;
230: message[msgCount].m_lines = 0;
231: Fclose(f);
232: }
233:
234: /*
235: * Append the passed message descriptor onto the temp file.
236: * If the write fails, return 1, else 0
237: */
238: int
239: append(mp, f)
240: struct message *mp;
241: FILE *f;
242: {
243: return fwrite((char *) mp, sizeof *mp, 1, f) != 1;
244: }
245:
246: /*
247: * Delete a file, but only if the file is a plain file.
248: */
249: int
250: rm(name)
251: char *name;
252: {
253: struct stat sb;
254:
255: if (stat(name, &sb) < 0)
256: return(-1);
257: if (!S_ISREG(sb.st_mode)) {
258: errno = EISDIR;
259: return(-1);
260: }
261: return(unlink(name));
262: }
263:
264: static int sigdepth; /* depth of holdsigs() */
1.2 deraadt 265: static sigset_t nset, oset;
1.1 deraadt 266: /*
267: * Hold signals SIGHUP, SIGINT, and SIGQUIT.
268: */
269: void
270: holdsigs()
271: {
272:
1.2 deraadt 273: if (sigdepth++ == 0) {
274: sigemptyset(&nset);
275: sigaddset(&nset, SIGHUP);
276: sigaddset(&nset, SIGINT);
277: sigaddset(&nset, SIGQUIT);
278: sigprocmask(SIG_BLOCK, &nset, &oset);
279: }
1.1 deraadt 280: }
281:
282: /*
283: * Release signals SIGHUP, SIGINT, and SIGQUIT.
284: */
285: void
286: relsesigs()
287: {
288:
289: if (--sigdepth == 0)
1.2 deraadt 290: sigprocmask(SIG_SETMASK, &oset, NULL);
1.1 deraadt 291: }
292:
293: /*
294: * Determine the size of the file possessed by
295: * the passed buffer.
296: */
297: off_t
298: fsize(iob)
299: FILE *iob;
300: {
301: struct stat sbuf;
302:
303: if (fstat(fileno(iob), &sbuf) < 0)
304: return 0;
305: return sbuf.st_size;
306: }
307:
308: /*
309: * Evaluate the string given as a new mailbox name.
310: * Supported meta characters:
311: * % for my system mail box
312: * %user for user's system mail box
313: * # for previous file
314: * & invoker's mbox file
315: * +file file in folder directory
316: * any shell meta character
317: * Return the file name as a dynamic string.
318: */
319: char *
320: expand(name)
321: register char *name;
322: {
323: char xname[PATHSIZE];
324: char cmdbuf[PATHSIZE]; /* also used for file names */
325: register int pid, l;
326: register char *cp, *shell;
327: int pivec[2];
328: struct stat sbuf;
329: extern union wait wait_status;
330:
331: /*
332: * The order of evaluation is "%" and "#" expand into constants.
333: * "&" can expand into "+". "+" can expand into shell meta characters.
334: * Shell meta characters expand into constants.
335: * This way, we make no recursive expansion.
336: */
337: switch (*name) {
338: case '%':
339: findmail(name[1] ? name + 1 : myname, xname);
340: return savestr(xname);
341: case '#':
342: if (name[1] != 0)
343: break;
344: if (prevfile[0] == 0) {
345: printf("No previous file\n");
346: return NOSTR;
347: }
348: return savestr(prevfile);
349: case '&':
350: if (name[1] == 0 && (name = value("MBOX")) == NOSTR)
351: name = "~/mbox";
352: /* fall through */
353: }
354: if (name[0] == '+' && getfold(cmdbuf) >= 0) {
355: sprintf(xname, "%s/%s", cmdbuf, name + 1);
356: name = savestr(xname);
357: }
358: /* catch the most common shell meta character */
359: if (name[0] == '~' && (name[1] == '/' || name[1] == '\0')) {
360: sprintf(xname, "%s%s", homedir, name + 1);
361: name = savestr(xname);
362: }
363: if (!anyof(name, "~{[*?$`'\"\\"))
364: return name;
365: if (pipe(pivec) < 0) {
366: perror("pipe");
367: return name;
368: }
369: sprintf(cmdbuf, "echo %s", name);
370: if ((shell = value("SHELL")) == NOSTR)
371: shell = _PATH_CSHELL;
372: pid = start_command(shell, 0, -1, pivec[1], "-c", cmdbuf, NOSTR);
373: if (pid < 0) {
374: close(pivec[0]);
375: close(pivec[1]);
376: return NOSTR;
377: }
378: close(pivec[1]);
379: l = read(pivec[0], xname, BUFSIZ);
380: close(pivec[0]);
381: if (wait_child(pid) < 0 && wait_status.w_termsig != SIGPIPE) {
382: fprintf(stderr, "\"%s\": Expansion failed.\n", name);
383: return NOSTR;
384: }
385: if (l < 0) {
386: perror("read");
387: return NOSTR;
388: }
389: if (l == 0) {
390: fprintf(stderr, "\"%s\": No match.\n", name);
391: return NOSTR;
392: }
393: if (l == BUFSIZ) {
394: fprintf(stderr, "\"%s\": Expansion buffer overflow.\n", name);
395: return NOSTR;
396: }
397: xname[l] = 0;
398: for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--)
399: ;
400: cp[1] = '\0';
1.3 ! millert 401: if (strchr(xname, ' ') && stat(xname, &sbuf) < 0) {
1.1 deraadt 402: fprintf(stderr, "\"%s\": Ambiguous.\n", name);
403: return NOSTR;
404: }
405: return savestr(xname);
406: }
407:
408: /*
409: * Determine the current folder directory name.
410: */
411: int
412: getfold(name)
413: char *name;
414: {
415: char *folder;
416:
417: if ((folder = value("folder")) == NOSTR)
418: return (-1);
419: if (*folder == '/')
420: strcpy(name, folder);
421: else
422: sprintf(name, "%s/%s", homedir, folder);
423: return (0);
424: }
425:
426: /*
427: * Return the name of the dead.letter file.
428: */
429: char *
430: getdeadletter()
431: {
432: register char *cp;
433:
434: if ((cp = value("DEAD")) == NOSTR || (cp = expand(cp)) == NOSTR)
435: cp = expand("~/dead.letter");
436: else if (*cp != '/') {
437: char buf[PATHSIZE];
438:
439: (void) sprintf(buf, "~/%s", cp);
440: cp = expand(buf);
441: }
442: return cp;
443: }