/* $OpenBSD: io.c,v 1.4 1998/03/30 06:59:27 deraadt Exp $ */ /* * Copyright (c) 1989, 1993, 1994 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint static const char copyright[] = "@(#) Copyright (c) 1989, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static const char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94"; #else static char rcsid[] = "$OpenBSD: io.c,v 1.4 1998/03/30 06:59:27 deraadt Exp $"; #endif #endif /* not lint */ #include <sys/param.h> #include <sys/stat.h> #include <sys/time.h> #include <sys/types.h> #include <sys/uio.h> #include <sys/wait.h> #include <ctype.h> #include <err.h> #include <errno.h> #include <locale.h> #include <pwd.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <tzfile.h> #include <unistd.h> #include "pathnames.h" #include "calendar.h" char *calendarFile = "calendar"; /* default calendar file */ char *calendarHome = ".calendar"; /* HOME */ char *calendarNoMail = "nomail"; /* don't sent mail if this file exist */ struct fixs neaster, npaskha; struct iovec header[] = { {"From: ", 6}, {NULL, 0}, {" (Reminder Service)\nTo: ", 24}, {NULL, 0}, {"\nSubject: ", 10}, {NULL, 0}, {"'s Calendar\nPrecedence: bulk\n\n", 30}, }; void cal() { register int printing; register char *p; FILE *fp; int ch, l; int month; int day; int var; char buf[2048 + 1]; if ((fp = opencal()) == NULL) return; for (printing = 0; fgets(buf, sizeof(buf), stdin) != NULL;) { if ((p = strchr(buf, '\n')) != NULL) *p = '\0'; else while ((ch = getchar()) != '\n' && ch != EOF); for (l = strlen(buf); l > 0 && isspace(buf[l - 1]); l--) ; buf[l] = '\0'; if (buf[0] == '\0') continue; if (strncmp(buf, "LANG=", 5) == 0) { (void) setlocale(LC_ALL, buf + 5); setnnames(); continue; } if (strncasecmp(buf, "Easter=", 7) == 0 && buf[7]) { if (neaster.name != NULL) free(neaster.name); if ((neaster.name = strdup(buf + 7)) == NULL) errx(1, "cannot allocate memory"); neaster.len = strlen(buf + 7); continue; } if (strncasecmp(buf, "Paskha=", 7) == 0 && buf[7]) { if (npaskha.name != NULL) free(npaskha.name); if ((npaskha.name = strdup(buf + 7)) == NULL) errx(1, "cannot allocate memory"); npaskha.len = strlen(buf + 7); continue; } if (buf[0] != '\t') { printing = isnow(buf, &month, &day, &var) ? 1 : 0; if ((p = strchr(buf, '\t')) == NULL) continue; if (p > buf && p[-1] == '*') var = 1; if (printing) { struct tm tm; char dbuf[30]; tm.tm_sec = 0; /* unused */ tm.tm_min = 0; /* unused */ tm.tm_hour = 0; /* unused */ tm.tm_wday = 0; /* unused */ tm.tm_mon = month - 1; tm.tm_mday = day; tm.tm_year = tp->tm_year; /* unused */ tm.tm_isdst = tp->tm_isdst; /* unused */ tm.tm_gmtoff = tp->tm_gmtoff; /* unused */ tm.tm_zone = tp->tm_zone; /* unused */ (void)strftime(dbuf, sizeof(dbuf), "%a %b %d", &tm); (void)fprintf(fp, "%s%c%s\n", dbuf + 4/* skip weekdays */, var ? '*' : ' ', p); } } else if (printing) fprintf(fp, "%s\n", buf); } closecal(fp); } int getfield(p, endp, flags) char *p, **endp; int *flags; { int val, var; char *start, savech; for (; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p) ; if (*p == '*') { /* `*' is current month */ *flags |= F_ISMONTH; *endp = p+1; return (tp->tm_mon + 1); } if (isdigit(*p)) { val = strtol(p, &p, 10); /* if 0, it's failure */ for (; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p) ; *endp = p; return (val); } for (start = p; isalpha(*++p);) ; /* Sunday-1 */ if (*p == '+' || *p == '-') for(; isdigit(*++p);) ; savech = *p; *p = '\0'; /* Month */ if ((val = getmonth(start)) != 0) *flags |= F_ISMONTH; /* Day */ else if ((val = getday(start)) != 0) { *flags |= F_ISDAY; /* variable weekday */ if ((var = getdayvar(start)) != 0) { if (var <=5 && var >= -4) val += var * 10; #ifdef DEBUG printf("var: %d\n", var); #endif } } /* Easter */ else if ((val = geteaster(start, tp->tm_year + TM_YEAR_BASE)) != 0) *flags |= F_EASTER; /* Paskha */ else if ((val = getpaskha(start, tp->tm_year + TM_YEAR_BASE)) != 0) *flags |= F_EASTER; /* undefined rest */ else { *p = savech; return (0); } for (*p = savech; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p) ; *endp = p; return (val); } char path[MAXPATHLEN]; FILE * opencal() { int fd, pdes[2]; struct stat sbuf; /* open up calendar file as stdin */ if (!freopen(calendarFile, "r", stdin)) { if (doall) { if (chdir(calendarHome) != 0) return (NULL); if (stat(calendarNoMail, &sbuf) == 0) return (NULL); if (!freopen(calendarFile, "r", stdin)) return (NULL); } else { chdir(getenv("HOME")); if (!(chdir(calendarHome) == 0 && freopen(calendarFile, "r", stdin))) errx(1, "no calendar file: ``%s'' or ``~/%s/%s", calendarFile, calendarHome, calendarFile); } } if (pipe(pdes) < 0) return (NULL); switch (vfork()) { case -1: /* error */ (void)close(pdes[0]); (void)close(pdes[1]); return (NULL); case 0: /* child -- stdin already setup, set stdout to pipe input */ if (pdes[1] != STDOUT_FILENO) { (void)dup2(pdes[1], STDOUT_FILENO); (void)close(pdes[1]); } (void)close(pdes[0]); (void)setuid(geteuid()); (void)setgid(getegid()); execl(_PATH_CPP, "cpp", "-P", "-I.", _PATH_INCLUDE, NULL); warn(_PATH_CPP); _exit(1); } /* parent -- set stdin to pipe output */ (void)dup2(pdes[0], STDIN_FILENO); (void)close(pdes[0]); (void)close(pdes[1]); /* not reading all calendar files, just set output to stdout */ if (!doall) return (stdout); /* set output to a temporary file, so if no output don't send mail */ (void)snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP); if ((fd = mkstemp(path)) < 0) return (NULL); return (fdopen(fd, "w+")); } void closecal(fp) FILE *fp; { struct stat sbuf; int nread, pdes[2], status; char buf[1024]; if (!doall) return; (void)rewind(fp); if (fstat(fileno(fp), &sbuf) || !sbuf.st_size) goto done; if (pipe(pdes) < 0) goto done; switch (vfork()) { case -1: /* error */ (void)close(pdes[0]); (void)close(pdes[1]); goto done; case 0: /* child -- set stdin to pipe output */ if (pdes[0] != STDIN_FILENO) { (void)dup2(pdes[0], STDIN_FILENO); (void)close(pdes[0]); } (void)close(pdes[1]); (void)setuid(geteuid()); (void)setgid(getegid()); execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F", "\"Reminder Service\"", "-f", "root", NULL); warn(_PATH_SENDMAIL); _exit(1); } /* parent -- write to pipe input */ (void)close(pdes[0]); header[1].iov_base = header[3].iov_base = pw->pw_name; header[1].iov_len = header[3].iov_len = strlen(pw->pw_name); writev(pdes[1], header, 7); while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0) (void)write(pdes[1], buf, nread); (void)close(pdes[1]); done: (void)fclose(fp); (void)unlink(path); while (wait(&status) >= 0); }