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Diffstat (limited to 'usr.bin/calendar/calendar.c')
-rw-r--r-- | usr.bin/calendar/calendar.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/usr.bin/calendar/calendar.c b/usr.bin/calendar/calendar.c new file mode 100644 index 0000000..95f1898 --- /dev/null +++ b/usr.bin/calendar/calendar.c @@ -0,0 +1,411 @@ +/* + * 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 char copyright[] = +"@(#) Copyright (c) 1989, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94"; +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/time.h> +#include <sys/stat.h> +#include <sys/uio.h> +#include <sys/wait.h> + +#include <ctype.h> +#include <err.h> +#include <errno.h> +#include <fcntl.h> +#include <pwd.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <tzfile.h> +#include <unistd.h> + +#include "pathnames.h" + +struct passwd *pw; +int doall; + +void cal __P((void)); +void closecal __P((FILE *)); +int getday __P((char *)); +int getfield __P((char *, char **, int *)); +int getmonth __P((char *)); +int isnow __P((char *)); +FILE *opencal __P((void)); +void settime __P((void)); +void usage __P((void)); + +int +main(argc, argv) + int argc; + char *argv[]; +{ + extern int optind; + int ch; + + while ((ch = getopt(argc, argv, "-a")) != EOF) + switch (ch) { + case '-': /* backward contemptible */ + case 'a': + if (getuid()) { + errno = EPERM; + err(1, NULL); + } + doall = 1; + break; + case '?': + default: + usage(); + } + argc -= optind; + argv += optind; + + if (argc) + usage(); + + settime(); + if (doall) + while ((pw = getpwent()) != NULL) { + (void)setegid(pw->pw_gid); + (void)seteuid(pw->pw_uid); + if (!chdir(pw->pw_dir)) + cal(); + (void)seteuid(0); + } + else + cal(); + exit(0); +} + +void +cal() +{ + register int printing; + register char *p; + FILE *fp; + int ch; + 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); + if (buf[0] == '\0') + continue; + if (buf[0] != '\t') + printing = isnow(buf) ? 1 : 0; + if (printing) + (void)fprintf(fp, "%s\n", buf); + } + closecal(fp); +} + +struct iovec header[] = { + "From: ", 6, + NULL, 0, + " (Reminder Service)\nTo: ", 24, + NULL, 0, + "\nSubject: ", 10, + NULL, 0, + "'s Calendar\nPrecedence: bulk\n\n", 30, +}; + +/* 1-based month, 0-based days, cumulative */ +int daytab[][14] = { + 0, -1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364, + 0, -1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365, +}; +struct tm *tp; +int *cumdays, offset, yrdays; +char dayname[10]; + +void +settime() +{ + time_t now; + + (void)time(&now); + tp = localtime(&now); + if (isleap(tp->tm_year + 1900)) { + yrdays = DAYSPERLYEAR; + cumdays = daytab[1]; + } else { + yrdays = DAYSPERNYEAR; + cumdays = daytab[0]; + } + /* Friday displays Monday's events */ + offset = tp->tm_wday == 5 ? 3 : 1; + header[5].iov_base = dayname; + header[5].iov_len = strftime(dayname, sizeof(dayname), "%A", tp); +} + +/* + * Possible date formats include any combination of: + * 3-charmonth (January, Jan, Jan) + * 3-charweekday (Friday, Monday, mon.) + * numeric month or day (1, 2, 04) + * + * Any character may separate them, or they may not be separated. Any line, + * following a line that is matched, that starts with "whitespace", is shown + * along with the matched line. + */ +int +isnow(endp) + char *endp; +{ + int day, flags, month, v1, v2; + +#define F_ISMONTH 0x01 +#define F_ISDAY 0x02 + flags = 0; + /* didn't recognize anything, skip it */ + if (!(v1 = getfield(endp, &endp, &flags))) + return (0); + if (flags & F_ISDAY || v1 > 12) { + /* found a day */ + day = v1; + /* if no recognizable month, assume just a day alone */ + if (!(month = getfield(endp, &endp, &flags))) + month = tp->tm_mon + 1; + } else if (flags & F_ISMONTH) { + month = v1; + /* if no recognizable day, assume the first */ + if (!(day = getfield(endp, &endp, &flags))) + day = 1; + } else { + v2 = getfield(endp, &endp, &flags); + if (flags & F_ISMONTH) { + day = v1; + month = v2; + } else { + /* F_ISDAY set, v2 > 12, or no way to tell */ + month = v1; + /* if no recognizable day, assume the first */ + day = v2 ? v2 : 1; + } + } + if (flags & F_ISDAY) + day = tp->tm_mday + (((day - 1) - tp->tm_wday + 7) % 7); + day = cumdays[month] + day; + + /* if today or today + offset days */ + if (day >= tp->tm_yday && day <= tp->tm_yday + offset) + return (1); + /* if number of days left in this year + days to event in next year */ + if (yrdays - tp->tm_yday + day <= offset) + return (1); + return (0); +} + +int +getfield(p, endp, flags) + char *p, **endp; + int *flags; +{ + int val; + 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);); + savech = *p; + *p = '\0'; + if ((val = getmonth(start)) != 0) + *flags |= F_ISMONTH; + else if ((val = getday(start)) != 0) + *flags |= F_ISDAY; + else { + *p = savech; + return (0); + } + for (*p = savech; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p); + *endp = p; + return (val); +} + +char path[MAXPATHLEN + 1]; + +FILE * +opencal() +{ + int fd, pdes[2]; + + /* open up calendar file as stdin */ + if (!freopen("calendar", "r", stdin)) { + if (doall) + return (NULL); + errx(1, "no calendar file."); + } + 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]); + execl(_PATH_CPP, "cpp", "-I.", _PATH_INCLUDE, NULL); + (void)fprintf(stderr, + "calendar: execl: %s: %s.\n", _PATH_CPP, strerror(errno)); + _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]); + execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F", + "\"Reminder Service\"", "-f", "root", NULL); + (void)fprintf(stderr, + "calendar: %s: %s.\n", _PATH_SENDMAIL, strerror(errno)); + _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); +} + +static char *months[] = { + "jan", "feb", "mar", "apr", "may", "jun", + "jul", "aug", "sep", "oct", "nov", "dec", NULL, +}; + +int +getmonth(s) + register char *s; +{ + register char **p; + + for (p = months; *p; ++p) + if (!strncasecmp(s, *p, 3)) + return ((p - months) + 1); + return (0); +} + +static char *days[] = { + "sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL, +}; + +int +getday(s) + register char *s; +{ + register char **p; + + for (p = days; *p; ++p) + if (!strncasecmp(s, *p, 3)) + return ((p - days) + 1); + return (0); +} + +void +usage() +{ + (void)fprintf(stderr, "usage: calendar [-a]\n"); + exit(1); +} |