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1.7 ! deraadt 1: /* $OpenBSD: msgs.c,v 1.6 1996/12/22 03:25:56 tholo Exp $ */
1.1 deraadt 2: /* $NetBSD: msgs.c,v 1.7 1995/09/28 06:57:40 tls Exp $ */
3:
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
38: static char copyright[] =
39: "@(#) Copyright (c) 1980, 1993\n\
40: The Regents of the University of California. All rights reserved.\n";
41: #endif /* not lint */
42:
43: #ifndef lint
44: #if 0
45: static char sccsid[] = "@(#)msgs.c 8.2 (Berkeley) 4/28/95";
46: #else
1.7 ! deraadt 47: static char rcsid[] = "$OpenBSD: msgs.c,v 1.6 1996/12/22 03:25:56 tholo Exp $";
1.1 deraadt 48: #endif
49: #endif /* not lint */
50:
51: /*
52: * msgs - a user bulletin board program
53: *
54: * usage:
55: * msgs [fhlopqr] [[-]number] to read messages
56: * msgs -s to place messages
57: * msgs -c [-days] to clean up the bulletin board
58: *
59: * prompt commands are:
60: * y print message
61: * n flush message, go to next message
62: * q flush message, quit
63: * p print message, turn on 'pipe thru more' mode
64: * P print message, turn off 'pipe thru more' mode
65: * - reprint last message
66: * s[-][<num>] [<filename>] save message
67: * m[-][<num>] mail with message in temp mbox
68: * x exit without flushing this message
69: * <num> print message number <num>
70: */
71:
72: #define V7 /* will look for TERM in the environment */
73: #define OBJECT /* will object to messages without Subjects */
74: #define REJECT /* will reject messages without Subjects
75: (OBJECT must be defined also) */
76: /* #define UNBUFFERED /* use unbuffered output */
77:
78: #include <sys/param.h>
79: #include <sys/ioctl.h>
1.2 deraadt 80: #include <sys/file.h>
1.1 deraadt 81: #include <sys/stat.h>
82: #include <dirent.h>
83: #include <ctype.h>
84: #include <errno.h>
85: #include <pwd.h>
86: #include <setjmp.h>
87: #include <signal.h>
88: #include <stdio.h>
89: #include <stdlib.h>
90: #include <string.h>
91: #include <termios.h>
92: #include <time.h>
93: #include <unistd.h>
94: #include "pathnames.h"
95:
96: #define CMODE 0664 /* bounds file creation mode */
97: #define NO 0
98: #define YES 1
99: #define SUPERUSER 0 /* superuser uid */
100: #define DAEMON 1 /* daemon uid */
101: #define NLINES 24 /* default number of lines/crt screen */
102: #define NDAYS 21 /* default keep time for messages */
103: #define DAYS *24*60*60 /* seconds/day */
104: #define MSGSRC ".msgsrc" /* user's rc file */
105: #define BOUNDS "bounds" /* message bounds file */
106: #define NEXT "Next message? [yq]"
107: #define MORE "More? [ynq]"
108: #define NOMORE "(No more) [q] ?"
109:
110: typedef char bool;
111:
112: FILE *msgsrc;
113: FILE *newmsg;
114: char *sep = "-";
115: char inbuf[BUFSIZ];
116: char fname[128];
117: char cmdbuf[128];
118: char subj[128];
119: char from[128];
120: char date[128];
121: char *ptr;
122: char *in;
123: bool local;
124: bool ruptible;
125: bool totty;
126: bool seenfrom;
127: bool seensubj;
128: bool blankline;
129: bool printing = NO;
130: bool mailing = NO;
131: bool quitit = NO;
132: bool sending = NO;
133: bool intrpflg = NO;
134: bool restricted = NO;
135: int uid;
136: int msg;
137: int prevmsg;
138: int lct;
139: int nlines;
140: int Lpp = 0;
141: time_t t;
142: time_t keep;
143:
144: char *nxtfld();
145: void onintr();
146: void onsusp();
147:
148: /* option initialization */
149: bool hdrs = NO;
150: bool qopt = NO;
151: bool hush = NO;
152: bool send_msg = NO;
153: bool locomode = NO;
154: bool use_pager = NO;
155: bool clean = NO;
156: bool lastcmd = NO;
157: jmp_buf tstpbuf;
158:
159: main(argc, argv)
160: int argc; char *argv[];
161: {
162: bool newrc, already;
163: int rcfirst = 0; /* first message to print (from .rc) */
164: int rcback = 0; /* amount to back off of rcfirst */
165: int firstmsg, nextmsg, lastmsg = 0;
166: int blast = 0;
167: FILE *bounds;
168:
169: #ifdef UNBUFFERED
170: setbuf(stdout, NULL);
171: #endif
172:
173: time(&t);
1.6 tholo 174: seteuid(uid = getuid());
175: setuid(uid);
1.1 deraadt 176: ruptible = (signal(SIGINT, SIG_IGN) == SIG_DFL);
177: if (ruptible)
178: signal(SIGINT, SIG_DFL);
179:
180: argc--, argv++;
181: while (argc > 0) {
182: if (isdigit(argv[0][0])) { /* starting message # */
183: rcfirst = atoi(argv[0]);
184: }
185: else if (isdigit(argv[0][1])) { /* backward offset */
186: rcback = atoi( &( argv[0][1] ) );
187: }
188: else {
189: ptr = *argv;
190: while (*ptr) switch (*ptr++) {
191:
192: case '-':
193: break;
194:
195: case 'c':
196: if (uid != SUPERUSER && uid != DAEMON) {
197: fprintf(stderr, "Sorry\n");
198: exit(1);
199: }
200: clean = YES;
201: break;
202:
203: case 'f': /* silently */
204: hush = YES;
205: break;
206:
207: case 'h': /* headers only */
208: hdrs = YES;
209: break;
210:
211: case 'l': /* local msgs only */
212: locomode = YES;
213: break;
214:
215: case 'o': /* option to save last message */
216: lastcmd = YES;
217: break;
218:
219: case 'p': /* pipe thru 'more' during long msgs */
220: use_pager = YES;
221: break;
222:
223: case 'q': /* query only */
224: qopt = YES;
225: break;
226:
227: case 'r': /* restricted */
228: restricted = YES;
229: break;
230:
231:
232: case 's': /* sending TO msgs */
233: send_msg = YES;
234: break;
235:
236: default:
237: fprintf(stderr,
238: "usage: msgs [fhlopqr] [[-]number]\n");
239: exit(1);
240: }
241: }
242: argc--, argv++;
243: }
244:
245: /*
246: * determine current message bounds
247: */
1.5 millert 248: snprintf(fname, sizeof(fname), "%s/%s", _PATH_MSGS, BOUNDS);
1.1 deraadt 249: bounds = fopen(fname, "r");
250:
251: if (bounds != NULL) {
252: fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg);
253: fclose(bounds);
254: blast = lastmsg; /* save upper bound */
255: }
256:
257: if (clean)
258: keep = t - (rcback? rcback : NDAYS) DAYS;
259:
260: if (clean || bounds == NULL) { /* relocate message bounds */
261: struct dirent *dp;
262: struct stat stbuf;
263: bool seenany = NO;
264: DIR *dirp;
265:
266: dirp = opendir(_PATH_MSGS);
267: if (dirp == NULL) {
268: perror(_PATH_MSGS);
269: exit(errno);
270: }
271: chmod(fname, CMODE);
272:
273: firstmsg = 32767;
274: lastmsg = 0;
275:
276: for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)){
277: register char *cp = dp->d_name;
278: register int i = 0;
279:
280: if (dp->d_ino == 0)
281: continue;
282: if (dp->d_namlen == 0)
283: continue;
284:
285: if (clean)
1.5 millert 286: snprintf(inbuf, sizeof(inbuf), "%s/%s",
287: _PATH_MSGS, cp);
1.1 deraadt 288:
289: while (isdigit(*cp))
290: i = i * 10 + *cp++ - '0';
291: if (*cp)
292: continue; /* not a message! */
293:
294: if (clean) {
295: if (stat(inbuf, &stbuf) != 0)
296: continue;
297: if (stbuf.st_mtime < keep
298: && stbuf.st_mode&S_IWRITE) {
299: unlink(inbuf);
300: continue;
301: }
302: }
303:
304: if (i > lastmsg)
305: lastmsg = i;
306: if (i < firstmsg)
307: firstmsg = i;
308: seenany = YES;
309: }
310: closedir(dirp);
311:
312: if (!seenany) {
313: if (blast != 0) /* never lower the upper bound! */
314: lastmsg = blast;
315: firstmsg = lastmsg + 1;
316: }
317: else if (blast > lastmsg)
318: lastmsg = blast;
319:
320: if (!send_msg) {
321: bounds = fopen(fname, "w");
322: if (bounds == NULL) {
323: perror(fname);
324: exit(errno);
325: }
326: chmod(fname, CMODE);
327: fprintf(bounds, "%d %d\n", firstmsg, lastmsg);
328: fclose(bounds);
329: }
330: }
331:
332: if (send_msg) {
333: /*
334: * Send mode - place msgs in _PATH_MSGS
335: */
336: bounds = fopen(fname, "w");
337: if (bounds == NULL) {
338: perror(fname);
339: exit(errno);
340: }
341:
342: nextmsg = lastmsg + 1;
1.5 millert 343: snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, nextmsg);
1.1 deraadt 344: newmsg = fopen(fname, "w");
345: if (newmsg == NULL) {
346: perror(fname);
347: exit(errno);
348: }
349: chmod(fname, 0644);
350:
351: fprintf(bounds, "%d %d\n", firstmsg, nextmsg);
352: fclose(bounds);
353:
354: sending = YES;
355: if (ruptible)
356: signal(SIGINT, onintr);
357:
358: if (isatty(fileno(stdin))) {
359: ptr = getpwuid(uid)->pw_name;
360: printf("Message %d:\nFrom %s %sSubject: ",
361: nextmsg, ptr, ctime(&t));
362: fflush(stdout);
363: fgets(inbuf, sizeof inbuf, stdin);
364: putchar('\n');
365: fflush(stdout);
366: fprintf(newmsg, "From %s %sSubject: %s\n",
367: ptr, ctime(&t), inbuf);
368: blankline = seensubj = YES;
369: }
370: else
371: blankline = seensubj = NO;
372: for (;;) {
373: fgets(inbuf, sizeof inbuf, stdin);
374: if (feof(stdin) || ferror(stdin))
375: break;
376: blankline = (blankline || (inbuf[0] == '\n'));
377: seensubj = (seensubj || (!blankline && (strncmp(inbuf, "Subj", 4) == 0)));
378: fputs(inbuf, newmsg);
379: }
380: #ifdef OBJECT
381: if (!seensubj) {
382: printf("NOTICE: Messages should have a Subject field!\n");
383: #ifdef REJECT
384: unlink(fname);
385: #endif
386: exit(1);
387: }
388: #endif
389: exit(ferror(stdin));
390: }
391: if (clean)
392: exit(0);
393:
394: /*
395: * prepare to display messages
396: */
397: totty = (isatty(fileno(stdout)) != 0);
398: use_pager = use_pager && totty;
399:
1.5 millert 400: snprintf(fname, sizeof(fname), "%s/%s", getenv("HOME"), MSGSRC);
1.1 deraadt 401: msgsrc = fopen(fname, "r");
402: if (msgsrc) {
403: newrc = NO;
404: fscanf(msgsrc, "%d\n", &nextmsg);
405: fclose(msgsrc);
406: if (nextmsg > lastmsg+1) {
407: printf("Warning: bounds have been reset (%d, %d)\n",
408: firstmsg, lastmsg);
409: truncate(fname, (off_t)0);
410: newrc = YES;
411: }
412: else if (!rcfirst)
413: rcfirst = nextmsg - rcback;
414: }
415: else
416: newrc = YES;
417: msgsrc = fopen(fname, "r+");
418: if (msgsrc == NULL)
419: msgsrc = fopen(fname, "w");
420: if (msgsrc == NULL) {
421: perror(fname);
422: exit(errno);
423: }
424: if (rcfirst) {
425: if (rcfirst > lastmsg+1) {
426: printf("Warning: the last message is number %d.\n",
427: lastmsg);
428: rcfirst = nextmsg;
429: }
430: if (rcfirst > firstmsg)
431: firstmsg = rcfirst; /* don't set below first msg */
432: }
433: if (newrc) {
434: nextmsg = firstmsg;
435: fseek(msgsrc, 0L, 0);
436: fprintf(msgsrc, "%d\n", nextmsg);
437: fflush(msgsrc);
438: }
439:
440: #ifdef V7
441: if (totty) {
442: struct winsize win;
443: if (ioctl(fileno(stdout), TIOCGWINSZ, &win) != -1)
444: Lpp = win.ws_row;
445: if (Lpp <= 0) {
446: if (tgetent(inbuf, getenv("TERM")) <= 0
447: || (Lpp = tgetnum("li")) <= 0) {
448: Lpp = NLINES;
449: }
450: }
451: }
452: #endif
453: Lpp -= 6; /* for headers, etc. */
454:
455: already = NO;
456: prevmsg = firstmsg;
457: printing = YES;
458: if (ruptible)
459: signal(SIGINT, onintr);
460:
461: /*
462: * Main program loop
463: */
464: for (msg = firstmsg; msg <= lastmsg; msg++) {
465:
1.5 millert 466: snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, msg);
1.1 deraadt 467: newmsg = fopen(fname, "r");
468: if (newmsg == NULL)
469: continue;
470:
471: gfrsub(newmsg); /* get From and Subject fields */
472: if (locomode && !local) {
473: fclose(newmsg);
474: continue;
475: }
476:
477: if (qopt) { /* This has to be located here */
478: printf("There are new messages.\n");
479: exit(0);
480: }
481:
482: if (already && !hdrs)
483: putchar('\n');
484:
485: /*
486: * Print header
487: */
488: if (totty)
489: signal(SIGTSTP, onsusp);
490: (void) setjmp(tstpbuf);
491: already = YES;
492: nlines = 2;
493: if (seenfrom) {
494: printf("Message %d:\nFrom %s %s", msg, from, date);
495: nlines++;
496: }
497: if (seensubj) {
498: printf("Subject: %s", subj);
499: nlines++;
500: }
501: else {
502: if (seenfrom) {
503: putchar('\n');
504: nlines++;
505: }
506: while (nlines < 6
507: && fgets(inbuf, sizeof inbuf, newmsg)
508: && inbuf[0] != '\n') {
509: fputs(inbuf, stdout);
510: nlines++;
511: }
512: }
513:
514: lct = linecnt(newmsg);
515: if (lct)
516: printf("(%d%slines) ", lct, seensubj? " " : " more ");
517:
518: if (hdrs) {
519: printf("\n-----\n");
520: fclose(newmsg);
521: continue;
522: }
523:
524: /*
525: * Ask user for command
526: */
527: if (totty)
528: ask(lct? MORE : (msg==lastmsg? NOMORE : NEXT));
529: else
530: inbuf[0] = 'y';
531: if (totty)
532: signal(SIGTSTP, SIG_DFL);
533: cmnd:
534: in = inbuf;
535: switch (*in) {
536: case 'x':
537: case 'X':
538: exit(0);
539:
540: case 'q':
541: case 'Q':
542: quitit = YES;
543: printf("--Postponed--\n");
544: exit(0);
545: /* intentional fall-thru */
546: case 'n':
547: case 'N':
548: if (msg >= nextmsg) sep = "Flushed";
549: prevmsg = msg;
550: break;
551:
552: case 'p':
553: case 'P':
554: use_pager = (*in++ == 'p');
555: /* intentional fallthru */
556: case '\n':
557: case 'y':
558: default:
559: if (*in == '-') {
560: msg = prevmsg-1;
561: sep = "replay";
562: break;
563: }
564: if (isdigit(*in)) {
565: msg = next(in);
566: sep = in;
567: break;
568: }
569:
570: prmesg(nlines + lct + (seensubj? 1 : 0));
571: prevmsg = msg;
572:
573: }
574:
575: printf("--%s--\n", sep);
576: sep = "-";
577: if (msg >= nextmsg) {
578: nextmsg = msg + 1;
579: fseek(msgsrc, 0L, 0);
580: fprintf(msgsrc, "%d\n", nextmsg);
581: fflush(msgsrc);
582: }
583: if (newmsg)
584: fclose(newmsg);
585: if (quitit)
586: break;
587: }
588:
589: /*
590: * Make sure .rc file gets updated
591: */
592: if (--msg >= nextmsg) {
593: nextmsg = msg + 1;
594: fseek(msgsrc, 0L, 0);
595: fprintf(msgsrc, "%d\n", nextmsg);
596: fflush(msgsrc);
597: }
598: if (already && !quitit && lastcmd && totty) {
599: /*
600: * save or reply to last message?
601: */
602: msg = prevmsg;
603: ask(NOMORE);
604: if (inbuf[0] == '-' || isdigit(inbuf[0]))
605: goto cmnd;
606: }
607: if (!(already || hush || qopt))
608: printf("No new messages.\n");
609: exit(0);
610: }
611:
612: prmesg(length)
613: int length;
614: {
615: FILE *outf;
616: char *env_pager;
617:
618: if (use_pager && length > Lpp) {
619: signal(SIGPIPE, SIG_IGN);
620: signal(SIGQUIT, SIG_IGN);
621: if ((env_pager = getenv("PAGER")) == NULL) {
1.5 millert 622: snprintf(cmdbuf, sizeof(cmdbuf), _PATH_PAGER, Lpp);
1.1 deraadt 623: } else {
624: strcpy(cmdbuf, env_pager);
625: }
626: outf = popen(cmdbuf, "w");
627: if (!outf)
628: outf = stdout;
629: else
630: setbuf(outf, (char *)NULL);
631: }
632: else
633: outf = stdout;
634:
635: if (seensubj)
636: putc('\n', outf);
637:
638: while (fgets(inbuf, sizeof inbuf, newmsg)) {
639: fputs(inbuf, outf);
640: if (ferror(outf)) {
641: clearerr(outf);
642: break;
643: }
644: }
645:
646: if (outf != stdout) {
647: pclose(outf);
648: signal(SIGPIPE, SIG_DFL);
649: signal(SIGQUIT, SIG_DFL);
650: }
651: else {
652: fflush(stdout);
653: }
654:
655: /* trick to force wait on output */
656: tcdrain(fileno(stdout));
657: }
658:
659: void
660: onintr()
661: {
662: signal(SIGINT, onintr);
663: if (mailing)
664: unlink(fname);
665: if (sending) {
666: unlink(fname);
667: puts("--Killed--");
668: exit(1);
669: }
670: if (printing) {
671: putchar('\n');
672: if (hdrs)
673: exit(0);
674: sep = "Interrupt";
675: if (newmsg)
676: fseek(newmsg, 0L, 2);
677: intrpflg = YES;
678: }
679: }
680:
681: /*
682: * We have just gotten a susp. Suspend and prepare to resume.
683: */
684: void
685: onsusp()
686: {
687:
688: signal(SIGTSTP, SIG_DFL);
689: sigsetmask(0);
690: kill(0, SIGTSTP);
691: signal(SIGTSTP, onsusp);
692: if (!mailing)
693: longjmp(tstpbuf, 0);
694: }
695:
696: linecnt(f)
697: FILE *f;
698: {
699: off_t oldpos = ftell(f);
700: int l = 0;
701: char lbuf[BUFSIZ];
702:
703: while (fgets(lbuf, sizeof lbuf, f))
704: l++;
705: clearerr(f);
706: fseek(f, oldpos, 0);
707: return (l);
708: }
709:
710: next(buf)
711: char *buf;
712: {
713: int i;
714: sscanf(buf, "%d", &i);
715: sprintf(buf, "Goto %d", i);
716: return(--i);
717: }
718:
719: ask(prompt)
720: char *prompt;
721: {
722: char inch;
1.2 deraadt 723: int n, cmsg, fd;
1.1 deraadt 724: off_t oldpos;
725: FILE *cpfrom, *cpto;
726:
727: printf("%s ", prompt);
728: fflush(stdout);
729: intrpflg = NO;
730: (void) fgets(inbuf, sizeof inbuf, stdin);
731: if ((n = strlen(inbuf)) > 0 && inbuf[n - 1] == '\n')
732: inbuf[n - 1] = '\0';
733: if (intrpflg)
734: inbuf[0] = 'x';
735:
736: /*
737: * Handle 'mail' and 'save' here.
738: */
739: if (((inch = inbuf[0]) == 's' || inch == 'm') && !restricted) {
740: if (inbuf[1] == '-')
741: cmsg = prevmsg;
742: else if (isdigit(inbuf[1]))
743: cmsg = atoi(&inbuf[1]);
744: else
745: cmsg = msg;
1.5 millert 746: snprintf(fname, sizeof(fname), "%s/%d", _PATH_MSGS, cmsg);
1.1 deraadt 747:
748: oldpos = ftell(newmsg);
749:
750: cpfrom = fopen(fname, "r");
751: if (!cpfrom) {
752: printf("Message %d not found\n", cmsg);
753: ask (prompt);
754: return;
755: }
756:
757: if (inch == 's') {
758: in = nxtfld(inbuf);
759: if (*in) {
760: for (n=0; in[n] > ' '; n++) { /* sizeof fname? */
761: fname[n] = in[n];
762: }
763: fname[n] = NULL;
764: }
765: else
766: strcpy(fname, "Messages");
1.7 ! deraadt 767: fd = open(fname, O_RDWR|O_EXCL|O_CREAT|O_APPEND);
1.1 deraadt 768: }
769: else {
1.4 deraadt 770: strcpy(fname, _PATH_TMPFILE);
1.7 ! deraadt 771: fd = mkstemp(fname);
! 772: if (fd != -1) {
! 773: snprintf(cmdbuf, sizeof(cmdbuf), _PATH_MAIL, fname);
! 774: mailing = YES;
! 775: }
! 776: }
! 777: if (fd == -1 || (cpto = fdopen(fd, "a")) == NULL) {
! 778: if (fd != -1)
1.2 deraadt 779: close(fd);
1.1 deraadt 780: perror(fname);
781: mailing = NO;
782: fseek(newmsg, oldpos, 0);
783: ask(prompt);
784: return;
785: }
786:
787: while (n = fread(inbuf, 1, sizeof inbuf, cpfrom))
788: fwrite(inbuf, 1, n, cpto);
789:
790: fclose(cpfrom);
791: fclose(cpto);
792: fseek(newmsg, oldpos, 0); /* reposition current message */
793: if (inch == 's')
794: printf("Message %d saved in \"%s\"\n", cmsg, fname);
795: else {
796: system(cmdbuf);
797: unlink(fname);
798: mailing = NO;
799: }
800: ask(prompt);
801: }
802: }
803:
804: gfrsub(infile)
805: FILE *infile;
806: {
807: off_t frompos;
808:
809: seensubj = seenfrom = NO;
810: local = YES;
811: subj[0] = from[0] = date[0] = NULL;
812:
813: /*
814: * Is this a normal message?
815: */
816: if (fgets(inbuf, sizeof inbuf, infile)) {
817: if (strncmp(inbuf, "From", 4)==0) {
818: /*
819: * expected form starts with From
820: */
821: seenfrom = YES;
822: frompos = ftell(infile);
823: ptr = from;
824: in = nxtfld(inbuf);
825: if (*in) while (*in && *in > ' ') {
826: if (*in == ':' || *in == '@' || *in == '!')
827: local = NO;
828: *ptr++ = *in++;
829: /* what about sizeof from ? */
830: }
831: *ptr = NULL;
832: if (*(in = nxtfld(in)))
833: strncpy(date, in, sizeof date);
834: else {
835: date[0] = '\n';
836: date[1] = NULL;
837: }
838: }
839: else {
840: /*
841: * not the expected form
842: */
843: fseek(infile, 0L, 0);
844: return;
845: }
846: }
847: else
848: /*
849: * empty file ?
850: */
851: return;
852:
853: /*
854: * look for Subject line until EOF or a blank line
855: */
856: while (fgets(inbuf, sizeof inbuf, infile)
857: && !(blankline = (inbuf[0] == '\n'))) {
858: /*
859: * extract Subject line
860: */
861: if (!seensubj && strncmp(inbuf, "Subj", 4)==0) {
862: seensubj = YES;
863: frompos = ftell(infile);
864: strncpy(subj, nxtfld(inbuf), sizeof subj);
865: }
866: }
867: if (!blankline)
868: /*
869: * ran into EOF
870: */
871: fseek(infile, frompos, 0);
872:
873: if (!seensubj)
874: /*
875: * for possible use with Mail
876: */
877: strncpy(subj, "(No Subject)\n", sizeof subj);
878: }
879:
880: char *
881: nxtfld(s)
882: char *s;
883: {
884: if (*s) while (*s && *s > ' ') s++; /* skip over this field */
885: if (*s) while (*s && *s <= ' ') s++; /* find start of next field */
886: return (s);
887: }