Annotation of src/usr.bin/mail/fio.c, Revision 1.10
1.10 ! millert 1: /* $OpenBSD: fio.c,v 1.9 1997/07/24 16:23:37 millert Exp $ */
1.6 millert 2: /* $NetBSD: fio.c,v 1.8 1997/07/07 22:57:55 phil Exp $ */
1.2 deraadt 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
1.6 millert 39: static char sccsid[] = "@(#)fio.c 8.2 (Berkeley) 4/20/95";
1.2 deraadt 40: #else
1.10 ! millert 41: static char rcsid[] = "$OpenBSD: fio.c,v 1.9 1997/07/24 16:23:37 millert 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
1.6 millert 64: setptr(ibuf, offset)
1.1 deraadt 65: register FILE *ibuf;
1.6 millert 66: off_t offset;
1.1 deraadt 67: {
68: register int c, count;
69: register char *cp, *cp2;
70: struct message this;
71: FILE *mestmp;
72: int maybe, inhead;
1.5 deraadt 73: char linebuf[LINESIZE], pathbuf[PATHSIZE];
1.6 millert 74: int omsgCount;
1.1 deraadt 75:
76: /* Get temporary file. */
1.6 millert 77: (void)snprintf(pathbuf, sizeof(pathbuf), "%s/mail.XXXXXXXXXX", tmpdir);
78: if ((c = mkstemp(pathbuf)) == -1 || (mestmp = Fdopen(c, "r+")) == NULL)
79: err(1, "can't open %s", pathbuf);
1.10 ! millert 80: (void)rm(pathbuf);
1.1 deraadt 81:
1.6 millert 82: if (offset == 0) {
83: msgCount = 0;
84: } else {
85: /* Seek into the file to get to the new messages */
1.7 millert 86: (void)fseek(ibuf, offset, 0);
1.6 millert 87: /*
88: * We need to make "offset" a pointer to the end of
89: * the temp file that has the copy of the mail file.
90: * If any messages have been edited, this will be
91: * different from the offset into the mail file.
92: */
1.7 millert 93: (void)fseek(otf, 0L, SEEK_END);
1.6 millert 94: offset = ftell(otf);
95: }
96: omsgCount = msgCount;
1.1 deraadt 97: maybe = 1;
98: inhead = 0;
99: this.m_flag = MUSED|MNEW;
100: this.m_size = 0;
101: this.m_lines = 0;
102: this.m_block = 0;
103: this.m_offset = 0;
104: for (;;) {
1.6 millert 105: if (fgets(linebuf, sizeof(linebuf), ibuf) == NULL) {
106: if (append(&this, mestmp))
107: err(1, "temporary file");
108: makemessage(mestmp, omsgCount);
1.1 deraadt 109: return;
110: }
111: count = strlen(linebuf);
1.7 millert 112: (void)fwrite(linebuf, sizeof(*linebuf), count, otf);
1.6 millert 113: if (ferror(otf))
114: err(1, "/tmp");
115: linebuf[count - 1] = '\0';
1.1 deraadt 116: if (maybe && linebuf[0] == 'F' && ishead(linebuf)) {
117: msgCount++;
1.6 millert 118: if (append(&this, mestmp))
119: err(1, "temporary file");
1.1 deraadt 120: this.m_flag = MUSED|MNEW;
121: this.m_size = 0;
122: this.m_lines = 0;
123: this.m_block = blockof(offset);
124: this.m_offset = offsetof(offset);
125: inhead = 1;
126: } else if (linebuf[0] == 0) {
127: inhead = 0;
128: } else if (inhead) {
129: for (cp = linebuf, cp2 = "status";; cp++) {
130: if ((c = *cp2++) == 0) {
131: while (isspace(*cp++))
132: ;
133: if (cp[-1] != ':')
134: break;
1.2 deraadt 135: while ((c = *cp++) != '\0')
1.1 deraadt 136: if (c == 'R')
137: this.m_flag |= MREAD;
138: else if (c == 'O')
139: this.m_flag &= ~MNEW;
140: inhead = 0;
141: break;
142: }
143: if (*cp != c && *cp != toupper(c))
144: break;
145: }
146: }
147: offset += count;
148: this.m_size += count;
149: this.m_lines++;
150: maybe = linebuf[0] == 0;
151: }
152: }
153:
154: /*
155: * Drop the passed line onto the passed output buffer.
156: * If a write error occurs, return -1, else the count of
1.6 millert 157: * characters written, including the newline if requested.
1.1 deraadt 158: */
159: int
1.6 millert 160: putline(obuf, linebuf, outlf)
1.1 deraadt 161: FILE *obuf;
162: char *linebuf;
1.6 millert 163: int outlf;
1.1 deraadt 164: {
165: register int c;
166:
167: c = strlen(linebuf);
1.7 millert 168: (void)fwrite(linebuf, sizeof(*linebuf), c, obuf);
1.6 millert 169: if (outlf) {
1.7 millert 170: (void)putc('\n', obuf);
1.6 millert 171: c++;
172: }
1.1 deraadt 173: if (ferror(obuf))
1.6 millert 174: return(-1);
175: return(c);
1.1 deraadt 176: }
177:
178: /*
179: * Read up a line from the specified input into the line
180: * buffer. Return the number of characters read. Do not
181: * include the newline at the end.
182: */
183: int
184: readline(ibuf, linebuf, linesize)
185: FILE *ibuf;
186: char *linebuf;
187: int linesize;
188: {
189: register int n;
190:
191: clearerr(ibuf);
192: if (fgets(linebuf, linesize, ibuf) == NULL)
1.6 millert 193: return(-1);
194:
1.1 deraadt 195: n = strlen(linebuf);
196: if (n > 0 && linebuf[n - 1] == '\n')
197: linebuf[--n] = '\0';
1.6 millert 198: return(n);
1.1 deraadt 199: }
200:
201: /*
202: * Return a file buffer all ready to read up the
203: * passed message pointer.
204: */
205: FILE *
206: setinput(mp)
207: register struct message *mp;
208: {
209:
210: fflush(otf);
211: if (fseek(itf, (long)positionof(mp->m_block, mp->m_offset), 0) < 0) {
1.6 millert 212: warn("fseek");
1.1 deraadt 213: panic("temporary file seek");
214: }
1.6 millert 215: return(itf);
1.1 deraadt 216: }
217:
218: /*
219: * Take the data out of the passed ghost file and toss it into
220: * a dynamically allocated message structure.
221: */
222: void
1.6 millert 223: makemessage(f, omsgCount)
1.1 deraadt 224: FILE *f;
1.6 millert 225: int omsgCount;
1.1 deraadt 226: {
1.7 millert 227: register size_t size = (msgCount + 1) * sizeof(struct message);
1.1 deraadt 228:
1.6 millert 229: if (omsgCount) {
1.7 millert 230: message = (struct message *)realloc(message, size);
1.6 millert 231: if (message == 0)
232: panic("Insufficient memory for %d messages\n", msgCount);
233: } else {
234: if (message != 0)
1.7 millert 235: (void)free(message);
236: if ((message = (struct message *)malloc(size)) == 0)
1.6 millert 237: panic("Insufficient memory for %d messages", msgCount);
238: dot = message;
239: }
240: size -= (omsgCount + 1) * sizeof(struct message);
1.1 deraadt 241: fflush(f);
1.7 millert 242: (void)lseek(fileno(f), (off_t)sizeof(*message), 0);
1.6 millert 243: if (read(fileno(f), (void *) &message[omsgCount], size) != size)
1.1 deraadt 244: panic("Message temporary file corrupted");
245: message[msgCount].m_size = 0;
246: message[msgCount].m_lines = 0;
1.6 millert 247: (void)Fclose(f);
1.1 deraadt 248: }
249:
250: /*
251: * Append the passed message descriptor onto the temp file.
252: * If the write fails, return 1, else 0
253: */
254: int
255: append(mp, f)
256: struct message *mp;
257: FILE *f;
258: {
1.6 millert 259: return(fwrite((char *) mp, sizeof(*mp), 1, f) != 1);
1.1 deraadt 260: }
261:
262: /*
263: * Delete a file, but only if the file is a plain file.
264: */
265: int
266: rm(name)
267: char *name;
268: {
269: struct stat sb;
270:
271: if (stat(name, &sb) < 0)
272: return(-1);
273: if (!S_ISREG(sb.st_mode)) {
274: errno = EISDIR;
275: return(-1);
276: }
277: return(unlink(name));
278: }
279:
280: static int sigdepth; /* depth of holdsigs() */
1.2 deraadt 281: static sigset_t nset, oset;
1.1 deraadt 282: /*
283: * Hold signals SIGHUP, SIGINT, and SIGQUIT.
284: */
285: void
286: holdsigs()
287: {
288:
1.2 deraadt 289: if (sigdepth++ == 0) {
290: sigemptyset(&nset);
291: sigaddset(&nset, SIGHUP);
292: sigaddset(&nset, SIGINT);
293: sigaddset(&nset, SIGQUIT);
294: sigprocmask(SIG_BLOCK, &nset, &oset);
295: }
1.1 deraadt 296: }
297:
298: /*
299: * Release signals SIGHUP, SIGINT, and SIGQUIT.
300: */
301: void
302: relsesigs()
303: {
304:
305: if (--sigdepth == 0)
1.2 deraadt 306: sigprocmask(SIG_SETMASK, &oset, NULL);
1.1 deraadt 307: }
308:
309: /*
310: * Determine the size of the file possessed by
311: * the passed buffer.
312: */
313: off_t
314: fsize(iob)
315: FILE *iob;
316: {
317: struct stat sbuf;
318:
319: if (fstat(fileno(iob), &sbuf) < 0)
1.6 millert 320: return(0);
321: return(sbuf.st_size);
1.1 deraadt 322: }
323:
324: /*
325: * Evaluate the string given as a new mailbox name.
326: * Supported meta characters:
327: * % for my system mail box
328: * %user for user's system mail box
329: * # for previous file
330: * & invoker's mbox file
331: * +file file in folder directory
332: * any shell meta character
333: * Return the file name as a dynamic string.
334: */
335: char *
336: expand(name)
337: register char *name;
338: {
339: char xname[PATHSIZE];
340: char cmdbuf[PATHSIZE]; /* also used for file names */
341: register int pid, l;
342: register char *cp, *shell;
343: int pivec[2];
344: struct stat sbuf;
345: extern union wait wait_status;
346:
347: /*
348: * The order of evaluation is "%" and "#" expand into constants.
349: * "&" can expand into "+". "+" can expand into shell meta characters.
350: * Shell meta characters expand into constants.
351: * This way, we make no recursive expansion.
352: */
353: switch (*name) {
354: case '%':
1.6 millert 355: findmail(name[1] ? name + 1 : myname, xname, sizeof(xname));
356: return(savestr(xname));
1.1 deraadt 357: case '#':
358: if (name[1] != 0)
359: break;
360: if (prevfile[0] == 0) {
1.6 millert 361: puts("No previous file");
1.8 millert 362: return(NULL);
1.1 deraadt 363: }
1.6 millert 364: return(savestr(prevfile));
1.1 deraadt 365: case '&':
1.8 millert 366: if (name[1] == 0 && (name = value("MBOX")) == NULL)
1.1 deraadt 367: name = "~/mbox";
368: /* fall through */
369: }
1.6 millert 370: if (name[0] == '+' && getfold(cmdbuf, sizeof(cmdbuf)) >= 0) {
1.10 ! millert 371: (void)snprintf(xname, sizeof(xname), "%s/%s", cmdbuf, name + 1);
1.1 deraadt 372: name = savestr(xname);
373: }
374: /* catch the most common shell meta character */
375: if (name[0] == '~' && (name[1] == '/' || name[1] == '\0')) {
1.10 ! millert 376: (void)snprintf(xname, sizeof(xname), "%s%s", homedir, name + 1);
1.1 deraadt 377: name = savestr(xname);
378: }
379: if (!anyof(name, "~{[*?$`'\"\\"))
1.6 millert 380: return(name);
1.1 deraadt 381: if (pipe(pivec) < 0) {
1.6 millert 382: warn("pipe");
383: return(name);
1.1 deraadt 384: }
1.10 ! millert 385: (void)snprintf(cmdbuf, sizeof(cmdbuf), "echo %s", name);
1.8 millert 386: if ((shell = value("SHELL")) == NULL)
1.1 deraadt 387: shell = _PATH_CSHELL;
1.8 millert 388: pid = start_command(shell, 0, -1, pivec[1], "-c", cmdbuf, NULL);
1.1 deraadt 389: if (pid < 0) {
1.6 millert 390: (void)close(pivec[0]);
391: (void)close(pivec[1]);
1.8 millert 392: return(NULL);
1.6 millert 393: }
394: (void)close(pivec[1]);
395: l = read(pivec[0], xname, PATHSIZE);
396: (void)close(pivec[0]);
1.1 deraadt 397: if (wait_child(pid) < 0 && wait_status.w_termsig != SIGPIPE) {
398: fprintf(stderr, "\"%s\": Expansion failed.\n", name);
1.8 millert 399: return(NULL);
1.1 deraadt 400: }
401: if (l < 0) {
1.6 millert 402: warn("read");
1.8 millert 403: return(NULL);
1.1 deraadt 404: }
405: if (l == 0) {
406: fprintf(stderr, "\"%s\": No match.\n", name);
1.8 millert 407: return(NULL);
1.1 deraadt 408: }
1.6 millert 409: if (l == PATHSIZE) {
1.1 deraadt 410: fprintf(stderr, "\"%s\": Expansion buffer overflow.\n", name);
1.8 millert 411: return(NULL);
1.1 deraadt 412: }
1.6 millert 413: xname[l] = '\0';
1.1 deraadt 414: for (cp = &xname[l-1]; *cp == '\n' && cp > xname; cp--)
415: ;
416: cp[1] = '\0';
1.3 millert 417: if (strchr(xname, ' ') && stat(xname, &sbuf) < 0) {
1.1 deraadt 418: fprintf(stderr, "\"%s\": Ambiguous.\n", name);
1.8 millert 419: return(NULL);
1.1 deraadt 420: }
1.6 millert 421: return(savestr(xname));
1.1 deraadt 422: }
423:
424: /*
425: * Determine the current folder directory name.
426: */
427: int
1.5 deraadt 428: getfold(name, namelen)
1.1 deraadt 429: char *name;
1.5 deraadt 430: int namelen;
1.1 deraadt 431: {
432: char *folder;
433:
1.8 millert 434: if ((folder = value("folder")) == NULL)
1.6 millert 435: return(-1);
1.5 deraadt 436: if (*folder == '/') {
437: strncpy(name, folder, namelen-1);
438: name[namelen-1] = '\0';
439: } else
1.10 ! millert 440: (void)snprintf(name, namelen, "%s/%s", homedir, folder);
1.6 millert 441: return(0);
1.1 deraadt 442: }
443:
444: /*
445: * Return the name of the dead.letter file.
446: */
447: char *
448: getdeadletter()
449: {
450: register char *cp;
451:
1.8 millert 452: if ((cp = value("DEAD")) == NULL || (cp = expand(cp)) == NULL)
1.1 deraadt 453: cp = expand("~/dead.letter");
454: else if (*cp != '/') {
455: char buf[PATHSIZE];
456:
1.7 millert 457: (void)snprintf(buf, sizeof(buf), "~/%s", cp);
1.1 deraadt 458: cp = expand(buf);
459: }
1.6 millert 460: return(cp);
1.1 deraadt 461: }
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