[hackers] [sbase] Rename crond to cron || sin

From: <git_AT_suckless.org>
Date: Tue, 16 Dec 2014 12:04:15 +0100

commit e29632977393ef1f2d08fc1cabd1412f20c1d500
Author: sin <sin_AT_2f30.org>
Date: Tue Dec 16 10:59:08 2014 +0000

    Rename crond to cron

diff --git a/Makefile b/Makefile
index 2133d96..9c1ecdf 100644
--- a/Makefile
+++ b/Makefile
_AT_@ -69,7 +69,7 @@ BIN =\
         cols\
         comm\
         cp\
- crond\
+ cron\
         cut\
         date\
         dirname\
diff --git a/README b/README
index 1299b8b..926d4ee 100644
--- a/README
+++ b/README
_AT_@ -20,7 +20,7 @@ cmp
 cols
 comm
 cp
-crond
+cron
 cut
 date
 dirname
diff --git a/cron.c b/cron.c
new file mode 100644
index 0000000..6e12521
--- /dev/null
+++ b/cron.c
_AT_@ -0,0 +1,494 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <syslog.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "queue.h"
+#include "util.h"
+
+struct field {
+ /* [low, high] */
+ long low;
+ long high;
+ /* for every `div' units */
+ long div;
+};
+
+struct ctabentry {
+ struct field min;
+ struct field hour;
+ struct field mday;
+ struct field mon;
+ struct field wday;
+ char *cmd;
+ TAILQ_ENTRY(ctabentry) entry;
+};
+
+struct jobentry {
+ char *cmd;
+ pid_t pid;
+ TAILQ_ENTRY(jobentry) entry;
+};
+
+char *argv0;
+static sig_atomic_t chldreap;
+static sig_atomic_t reload;
+static sig_atomic_t quit;
+static TAILQ_HEAD(, ctabentry) ctabhead = TAILQ_HEAD_INITIALIZER(ctabhead);
+static TAILQ_HEAD(, jobentry) jobhead = TAILQ_HEAD_INITIALIZER(jobhead);
+static char *config = "/etc/crontab";
+static char *pidfile = "/var/run/crond.pid";
+static int nflag;
+
+static void
+loginfo(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ if (nflag == 0)
+ vsyslog(LOG_INFO, fmt, ap);
+ else
+ vfprintf(stdout, fmt, ap);
+ fflush(stdout);
+ va_end(ap);
+}
+
+static void
+logwarn(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ if (nflag == 0)
+ vsyslog(LOG_WARNING, fmt, ap);
+ else
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+}
+
+static void
+logerr(const char *fmt, ...)
+{
+ va_list ap;
+ va_start(ap, fmt);
+ if (nflag == 0)
+ vsyslog(LOG_ERR, fmt, ap);
+ else
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+}
+
+static void
+runjob(char *cmd)
+{
+ struct jobentry *je;
+ time_t t;
+ pid_t pid;
+
+ t = time(NULL);
+
+ /* If command is already running, skip it */
+ TAILQ_FOREACH(je, &jobhead, entry) {
+ if (strcmp(je->cmd, cmd) == 0) {
+ loginfo("already running %s pid: %d at %s",
+ je->cmd, je->pid, ctime(&t));
+ return;
+ }
+ }
+
+ pid = fork();
+ if (pid < 0) {
+ logerr("error: failed to fork job: %s time: %s",
+ cmd, ctime(&t));
+ return;
+ } else if (pid == 0) {
+ setsid();
+ loginfo("run: %s pid: %d at %s",
+ cmd, getpid(), ctime(&t));
+ execl("/bin/sh", "/bin/sh", "-c", cmd, (char *)NULL);
+ logerr("error: failed to execute job: %s time: %s",
+ cmd, ctime(&t));
+ _exit(1);
+ } else {
+ je = emalloc(sizeof(*je));
+ je->cmd = estrdup(cmd);
+ je->pid = pid;
+ TAILQ_INSERT_TAIL(&jobhead, je, entry);
+ }
+}
+
+static void
+waitjob(void)
+{
+ struct jobentry *je, *tmp;
+ int status;
+ time_t t;
+ pid_t pid;
+
+ t = time(NULL);
+
+ while ((pid = waitpid(-1, &status, WNOHANG | WUNTRACED)) > 0) {
+ je = NULL;
+ TAILQ_FOREACH(tmp, &jobhead, entry) {
+ if (tmp->pid == pid) {
+ je = tmp;
+ break;
+ }
+ }
+ if (je) {
+ TAILQ_REMOVE(&jobhead, je, entry);
+ free(je->cmd);
+ free(je);
+ }
+ if (WIFEXITED(status) == 1)
+ loginfo("complete: pid: %d returned: %d time: %s",
+ pid, WEXITSTATUS(status), ctime(&t));
+ else if (WIFSIGNALED(status) == 1)
+ loginfo("complete: pid: %d terminated by signal: %s time: %s",
+ pid, strsignal(WTERMSIG(status)), ctime(&t));
+ else if (WIFSTOPPED(status) == 1)
+ loginfo("complete: pid: %d stopped by signal: %s time: %s",
+ pid, strsignal(WSTOPSIG(status)), ctime(&t));
+ }
+}
+
+static int
+isleap(int year)
+{
+ if (year % 400 == 0)
+ return 1;
+ if (year % 100 == 0)
+ return 0;
+ return (year % 4 == 0);
+}
+
+static int
+daysinmon(int mon, int year)
+{
+ int days[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
+ if (year < 1900)
+ year += 1900;
+ if (isleap(year))
+ days[1] = 29;
+ return days[mon];
+}
+
+static int
+matchentry(struct ctabentry *cte, struct tm *tm)
+{
+ struct {
+ struct field *f;
+ int tm;
+ int len;
+ } matchtbl[] = {
+ { .f = &cte->min, .tm = tm->tm_min, .len = 60 },
+ { .f = &cte->hour, .tm = tm->tm_hour, .len = 24 },
+ { .f = &cte->mday, .tm = tm->tm_mday, .len = daysinmon(tm->tm_mon, tm->tm_year) },
+ { .f = &cte->mon, .tm = tm->tm_mon, .len = 12 },
+ { .f = &cte->wday, .tm = tm->tm_wday, .len = 7 },
+ };
+ size_t i;
+
+ for (i = 0; i < LEN(matchtbl); i++) {
+ if (matchtbl[i].f->high == -1) {
+ if (matchtbl[i].f->low == -1) {
+ continue;
+ } else if (matchtbl[i].f->div > 0) {
+ if (matchtbl[i].tm > 0) {
+ if (matchtbl[i].tm % matchtbl[i].f->div == 0)
+ continue;
+ } else {
+ if (matchtbl[i].len % matchtbl[i].f->div == 0)
+ continue;
+ }
+ } else if (matchtbl[i].f->low == matchtbl[i].tm) {
+ continue;
+ }
+ } else if (matchtbl[i].f->low <= matchtbl[i].tm &&
+ matchtbl[i].f->high >= matchtbl[i].tm) {
+ continue;
+ }
+ break;
+ }
+ if (i != LEN(matchtbl))
+ return 0;
+ return 1;
+}
+
+static int
+parsefield(const char *field, long low, long high, struct field *f)
+{
+ long min, max, div;
+ char *e1, *e2;
+
+ if (strcmp(field, "*") == 0) {
+ f->low = -1;
+ f->high = -1;
+ return 0;
+ }
+
+ div = -1;
+ max = -1;
+ min = strtol(field, &e1, 10);
+
+ switch (e1[0]) {
+ case '-':
+ e1++;
+ errno = 0;
+ max = strtol(e1, &e2, 10);
+ if (e2[0] != '\0' || errno != 0)
+ return -1;
+ break;
+ case '*':
+ e1++;
+ if (e1[0] != '/')
+ return -1;
+ e1++;
+ errno = 0;
+ div = strtol(e1, &e2, 10);
+ if (e2[0] != '\0' || errno != 0)
+ return -1;
+ break;
+ case '\0':
+ break;
+ default:
+ return -1;
+ }
+
+ if (min < low || min > high)
+ return -1;
+ if (max != -1)
+ if (max < low || max > high)
+ return -1;
+ if (div != -1)
+ if (div < low || div > high)
+ return -1;
+
+ f->low = min;
+ f->high = max;
+ f->div = div;
+ return 0;
+}
+
+static void
+unloadentries(void)
+{
+ struct ctabentry *cte, *tmp;
+
+ for (cte = TAILQ_FIRST(&ctabhead); cte; cte = tmp) {
+ tmp = TAILQ_NEXT(cte, entry);
+ TAILQ_REMOVE(&ctabhead, cte, entry);
+ free(cte->cmd);
+ free(cte);
+ }
+}
+
+static int
+loadentries(void)
+{
+ struct ctabentry *cte;
+ FILE *fp;
+ char *line = NULL, *p, *col;
+ int r = 0, y;
+ size_t size = 0;
+ ssize_t len;
+
+ if ((fp = fopen(config, "r")) == NULL) {
+ logerr("error: can't open %s: %s\n", config, strerror(errno));
+ return -1;
+ }
+
+ for (y = 0; (len = getline(&line, &size, fp)) != -1; y++) {
+ p = line;
+ if (line[0] == '#' || line[0] == '\n' || line[0] == '\0')
+ continue;
+
+ cte = emalloc(sizeof(*cte));
+
+ col = strsep(&p, "\t");
+ if (!col || parsefield(col, 0, 59, &cte->min) < 0) {
+ logerr("error: failed to parse `min' field on line %d\n",
+ y + 1);
+ free(cte);
+ r = -1;
+ break;
+ }
+
+ col = strsep(&p, "\t");
+ if (!col || parsefield(col, 0, 23, &cte->hour) < 0) {
+ logerr("error: failed to parse `hour' field on line %d\n",
+ y + 1);
+ free(cte);
+ r = -1;
+ break;
+ }
+
+ col = strsep(&p, "\t");
+ if (!col || parsefield(col, 1, 31, &cte->mday) < 0) {
+ logerr("error: failed to parse `mday' field on line %d\n",
+ y + 1);
+ free(cte);
+ r = -1;
+ break;
+ }
+
+ col = strsep(&p, "\t");
+ if (!col || parsefield(col, 1, 12, &cte->mon) < 0) {
+ logerr("error: failed to parse `mon' field on line %d\n",
+ y + 1);
+ free(cte);
+ r = -1;
+ break;
+ }
+
+ col = strsep(&p, "\t");
+ if (!col || parsefield(col, 0, 6, &cte->wday) < 0) {
+ logerr("error: failed to parse `wday' field on line %d\n",
+ y + 1);
+ free(cte);
+ r = -1;
+ break;
+ }
+
+ col = strsep(&p, "\n");
+ if (!col) {
+ logerr("error: missing `cmd' field on line %d\n",
+ y + 1);
+ free(cte);
+ r = -1;
+ break;
+ }
+ cte->cmd = estrdup(col);
+
+ TAILQ_INSERT_TAIL(&ctabhead, cte, entry);
+ }
+
+ if (r < 0)
+ unloadentries();
+
+ free(line);
+ fclose(fp);
+
+ return r;
+}
+
+static void
+reloadentries(void)
+{
+ unloadentries();
+ if (loadentries() < 0)
+ logwarn("warning: discarding old crontab entries\n");
+}
+
+static void
+sighandler(int sig)
+{
+ switch (sig) {
+ case SIGCHLD:
+ chldreap = 1;
+ break;
+ case SIGHUP:
+ reload = 1;
+ break;
+ case SIGTERM:
+ quit = 1;
+ break;
+ }
+}
+
+static void
+usage(void)
+{
+ eprintf("usage: %s [-f file] [-n]\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+ FILE *fp;
+ struct ctabentry *cte;
+ time_t t;
+ struct tm *tm;
+ struct sigaction sa;
+
+ ARGBEGIN {
+ case 'n':
+ nflag = 1;
+ break;
+ case 'f':
+ config = EARGF(usage());
+ break;
+ default:
+ usage();
+ } ARGEND;
+
+ if (argc > 0)
+ usage();
+
+ if (nflag == 0) {
+ openlog(argv[0], LOG_CONS | LOG_PID, LOG_CRON);
+ if (daemon(1, 0) < 0) {
+ logerr("error: failed to daemonize %s\n", strerror(errno));
+ return 1;
+ }
+ if ((fp = fopen(pidfile, "w"))) {
+ fprintf(fp, "%d\n", getpid());
+ fclose(fp);
+ }
+ }
+
+ sa.sa_handler = sighandler;
+ sigfillset(&sa.sa_mask);
+ sa.sa_flags = SA_RESTART;
+ sigaction(SIGCHLD, &sa, NULL);
+ sigaction(SIGHUP, &sa, NULL);
+ sigaction(SIGTERM, &sa, NULL);
+
+ loadentries();
+
+ while (1) {
+ t = time(NULL);
+ sleep(60 - t % 60);
+
+ if (quit == 1) {
+ if (nflag == 0)
+ unlink(pidfile);
+ unloadentries();
+ /* Don't wait or kill forked processes, just exit */
+ break;
+ }
+
+ if (reload == 1 || chldreap == 1) {
+ if (reload == 1) {
+ reloadentries();
+ reload = 0;
+ }
+ if (chldreap == 1) {
+ waitjob();
+ chldreap = 0;
+ }
+ continue;
+ }
+
+ TAILQ_FOREACH(cte, &ctabhead, entry) {
+ t = time(NULL);
+ tm = localtime(&t);
+ if (matchentry(cte, tm) == 1)
+ runjob(cte->cmd);
+ }
+ }
+
+ if (nflag == 0)
+ closelog();
+
+ return 0;
+}
diff --git a/crond.c b/crond.c
deleted file mode 100644
index 6e12521..0000000
--- a/crond.c
+++ /dev/null
_AT_@ -1,494 +0,0 @@
-/* See LICENSE file for copyright and license details. */
-#include <sys/types.h>
-#include <sys/wait.h>
-
-#include <errno.h>
-#include <limits.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <syslog.h>
-#include <time.h>
-#include <unistd.h>
-
-#include "queue.h"
-#include "util.h"
-
-struct field {
- /* [low, high] */
- long low;
- long high;
- /* for every `div' units */
- long div;
-};
-
-struct ctabentry {
- struct field min;
- struct field hour;
- struct field mday;
- struct field mon;
- struct field wday;
- char *cmd;
- TAILQ_ENTRY(ctabentry) entry;
-};
-
-struct jobentry {
- char *cmd;
- pid_t pid;
- TAILQ_ENTRY(jobentry) entry;
-};
-
-char *argv0;
-static sig_atomic_t chldreap;
-static sig_atomic_t reload;
-static sig_atomic_t quit;
-static TAILQ_HEAD(, ctabentry) ctabhead = TAILQ_HEAD_INITIALIZER(ctabhead);
-static TAILQ_HEAD(, jobentry) jobhead = TAILQ_HEAD_INITIALIZER(jobhead);
-static char *config = "/etc/crontab";
-static char *pidfile = "/var/run/crond.pid";
-static int nflag;
-
-static void
-loginfo(const char *fmt, ...)
-{
- va_list ap;
- va_start(ap, fmt);
- if (nflag == 0)
- vsyslog(LOG_INFO, fmt, ap);
- else
- vfprintf(stdout, fmt, ap);
- fflush(stdout);
- va_end(ap);
-}
-
-static void
-logwarn(const char *fmt, ...)
-{
- va_list ap;
- va_start(ap, fmt);
- if (nflag == 0)
- vsyslog(LOG_WARNING, fmt, ap);
- else
- vfprintf(stderr, fmt, ap);
- va_end(ap);
-}
-
-static void
-logerr(const char *fmt, ...)
-{
- va_list ap;
- va_start(ap, fmt);
- if (nflag == 0)
- vsyslog(LOG_ERR, fmt, ap);
- else
- vfprintf(stderr, fmt, ap);
- va_end(ap);
-}
-
-static void
-runjob(char *cmd)
-{
- struct jobentry *je;
- time_t t;
- pid_t pid;
-
- t = time(NULL);
-
- /* If command is already running, skip it */
- TAILQ_FOREACH(je, &jobhead, entry) {
- if (strcmp(je->cmd, cmd) == 0) {
- loginfo("already running %s pid: %d at %s",
- je->cmd, je->pid, ctime(&t));
- return;
- }
- }
-
- pid = fork();
- if (pid < 0) {
- logerr("error: failed to fork job: %s time: %s",
- cmd, ctime(&t));
- return;
- } else if (pid == 0) {
- setsid();
- loginfo("run: %s pid: %d at %s",
- cmd, getpid(), ctime(&t));
- execl("/bin/sh", "/bin/sh", "-c", cmd, (char *)NULL);
- logerr("error: failed to execute job: %s time: %s",
- cmd, ctime(&t));
- _exit(1);
- } else {
- je = emalloc(sizeof(*je));
- je->cmd = estrdup(cmd);
- je->pid = pid;
- TAILQ_INSERT_TAIL(&jobhead, je, entry);
- }
-}
-
-static void
-waitjob(void)
-{
- struct jobentry *je, *tmp;
- int status;
- time_t t;
- pid_t pid;
-
- t = time(NULL);
-
- while ((pid = waitpid(-1, &status, WNOHANG | WUNTRACED)) > 0) {
- je = NULL;
- TAILQ_FOREACH(tmp, &jobhead, entry) {
- if (tmp->pid == pid) {
- je = tmp;
- break;
- }
- }
- if (je) {
- TAILQ_REMOVE(&jobhead, je, entry);
- free(je->cmd);
- free(je);
- }
- if (WIFEXITED(status) == 1)
- loginfo("complete: pid: %d returned: %d time: %s",
- pid, WEXITSTATUS(status), ctime(&t));
- else if (WIFSIGNALED(status) == 1)
- loginfo("complete: pid: %d terminated by signal: %s time: %s",
- pid, strsignal(WTERMSIG(status)), ctime(&t));
- else if (WIFSTOPPED(status) == 1)
- loginfo("complete: pid: %d stopped by signal: %s time: %s",
- pid, strsignal(WSTOPSIG(status)), ctime(&t));
- }
-}
-
-static int
-isleap(int year)
-{
- if (year % 400 == 0)
- return 1;
- if (year % 100 == 0)
- return 0;
- return (year % 4 == 0);
-}
-
-static int
-daysinmon(int mon, int year)
-{
- int days[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
- if (year < 1900)
- year += 1900;
- if (isleap(year))
- days[1] = 29;
- return days[mon];
-}
-
-static int
-matchentry(struct ctabentry *cte, struct tm *tm)
-{
- struct {
- struct field *f;
- int tm;
- int len;
- } matchtbl[] = {
- { .f = &cte->min, .tm = tm->tm_min, .len = 60 },
- { .f = &cte->hour, .tm = tm->tm_hour, .len = 24 },
- { .f = &cte->mday, .tm = tm->tm_mday, .len = daysinmon(tm->tm_mon, tm->tm_year) },
- { .f = &cte->mon, .tm = tm->tm_mon, .len = 12 },
- { .f = &cte->wday, .tm = tm->tm_wday, .len = 7 },
- };
- size_t i;
-
- for (i = 0; i < LEN(matchtbl); i++) {
- if (matchtbl[i].f->high == -1) {
- if (matchtbl[i].f->low == -1) {
- continue;
- } else if (matchtbl[i].f->div > 0) {
- if (matchtbl[i].tm > 0) {
- if (matchtbl[i].tm % matchtbl[i].f->div == 0)
- continue;
- } else {
- if (matchtbl[i].len % matchtbl[i].f->div == 0)
- continue;
- }
- } else if (matchtbl[i].f->low == matchtbl[i].tm) {
- continue;
- }
- } else if (matchtbl[i].f->low <= matchtbl[i].tm &&
- matchtbl[i].f->high >= matchtbl[i].tm) {
- continue;
- }
- break;
- }
- if (i != LEN(matchtbl))
- return 0;
- return 1;
-}
-
-static int
-parsefield(const char *field, long low, long high, struct field *f)
-{
- long min, max, div;
- char *e1, *e2;
-
- if (strcmp(field, "*") == 0) {
- f->low = -1;
- f->high = -1;
- return 0;
- }
-
- div = -1;
- max = -1;
- min = strtol(field, &e1, 10);
-
- switch (e1[0]) {
- case '-':
- e1++;
- errno = 0;
- max = strtol(e1, &e2, 10);
- if (e2[0] != '\0' || errno != 0)
- return -1;
- break;
- case '*':
- e1++;
- if (e1[0] != '/')
- return -1;
- e1++;
- errno = 0;
- div = strtol(e1, &e2, 10);
- if (e2[0] != '\0' || errno != 0)
- return -1;
- break;
- case '\0':
- break;
- default:
- return -1;
- }
-
- if (min < low || min > high)
- return -1;
- if (max != -1)
- if (max < low || max > high)
- return -1;
- if (div != -1)
- if (div < low || div > high)
- return -1;
-
- f->low = min;
- f->high = max;
- f->div = div;
- return 0;
-}
-
-static void
-unloadentries(void)
-{
- struct ctabentry *cte, *tmp;
-
- for (cte = TAILQ_FIRST(&ctabhead); cte; cte = tmp) {
- tmp = TAILQ_NEXT(cte, entry);
- TAILQ_REMOVE(&ctabhead, cte, entry);
- free(cte->cmd);
- free(cte);
- }
-}
-
-static int
-loadentries(void)
-{
- struct ctabentry *cte;
- FILE *fp;
- char *line = NULL, *p, *col;
- int r = 0, y;
- size_t size = 0;
- ssize_t len;
-
- if ((fp = fopen(config, "r")) == NULL) {
- logerr("error: can't open %s: %s\n", config, strerror(errno));
- return -1;
- }
-
- for (y = 0; (len = getline(&line, &size, fp)) != -1; y++) {
- p = line;
- if (line[0] == '#' || line[0] == '\n' || line[0] == '\0')
- continue;
-
- cte = emalloc(sizeof(*cte));
-
- col = strsep(&p, "\t");
- if (!col || parsefield(col, 0, 59, &cte->min) < 0) {
- logerr("error: failed to parse `min' field on line %d\n",
- y + 1);
- free(cte);
- r = -1;
- break;
- }
-
- col = strsep(&p, "\t");
- if (!col || parsefield(col, 0, 23, &cte->hour) < 0) {
- logerr("error: failed to parse `hour' field on line %d\n",
- y + 1);
- free(cte);
- r = -1;
- break;
- }
-
- col = strsep(&p, "\t");
- if (!col || parsefield(col, 1, 31, &cte->mday) < 0) {
- logerr("error: failed to parse `mday' field on line %d\n",
- y + 1);
- free(cte);
- r = -1;
- break;
- }
-
- col = strsep(&p, "\t");
- if (!col || parsefield(col, 1, 12, &cte->mon) < 0) {
- logerr("error: failed to parse `mon' field on line %d\n",
- y + 1);
- free(cte);
- r = -1;
- break;
- }
-
- col = strsep(&p, "\t");
- if (!col || parsefield(col, 0, 6, &cte->wday) < 0) {
- logerr("error: failed to parse `wday' field on line %d\n",
- y + 1);
- free(cte);
- r = -1;
- break;
- }
-
- col = strsep(&p, "\n");
- if (!col) {
- logerr("error: missing `cmd' field on line %d\n",
- y + 1);
- free(cte);
- r = -1;
- break;
- }
- cte->cmd = estrdup(col);
-
- TAILQ_INSERT_TAIL(&ctabhead, cte, entry);
- }
-
- if (r < 0)
- unloadentries();
-
- free(line);
- fclose(fp);
-
- return r;
-}
-
-static void
-reloadentries(void)
-{
- unloadentries();
- if (loadentries() < 0)
- logwarn("warning: discarding old crontab entries\n");
-}
-
-static void
-sighandler(int sig)
-{
- switch (sig) {
- case SIGCHLD:
- chldreap = 1;
- break;
- case SIGHUP:
- reload = 1;
- break;
- case SIGTERM:
- quit = 1;
- break;
- }
-}
-
-static void
-usage(void)
-{
- eprintf("usage: %s [-f file] [-n]\n", argv0);
-}
-
-int
-main(int argc, char *argv[])
-{
- FILE *fp;
- struct ctabentry *cte;
- time_t t;
- struct tm *tm;
- struct sigaction sa;
-
- ARGBEGIN {
- case 'n':
- nflag = 1;
- break;
- case 'f':
- config = EARGF(usage());
- break;
- default:
- usage();
- } ARGEND;
-
- if (argc > 0)
- usage();
-
- if (nflag == 0) {
- openlog(argv[0], LOG_CONS | LOG_PID, LOG_CRON);
- if (daemon(1, 0) < 0) {
- logerr("error: failed to daemonize %s\n", strerror(errno));
- return 1;
- }
- if ((fp = fopen(pidfile, "w"))) {
- fprintf(fp, "%d\n", getpid());
- fclose(fp);
- }
- }
-
- sa.sa_handler = sighandler;
- sigfillset(&sa.sa_mask);
- sa.sa_flags = SA_RESTART;
- sigaction(SIGCHLD, &sa, NULL);
- sigaction(SIGHUP, &sa, NULL);
- sigaction(SIGTERM, &sa, NULL);
-
- loadentries();
-
- while (1) {
- t = time(NULL);
- sleep(60 - t % 60);
-
- if (quit == 1) {
- if (nflag == 0)
- unlink(pidfile);
- unloadentries();
- /* Don't wait or kill forked processes, just exit */
- break;
- }
-
- if (reload == 1 || chldreap == 1) {
- if (reload == 1) {
- reloadentries();
- reload = 0;
- }
- if (chldreap == 1) {
- waitjob();
- chldreap = 0;
- }
- continue;
- }
-
- TAILQ_FOREACH(cte, &ctabhead, entry) {
- t = time(NULL);
- tm = localtime(&t);
- if (matchentry(cte, tm) == 1)
- runjob(cte->cmd);
- }
- }
-
- if (nflag == 0)
- closelog();
-
- return 0;
-}
Received on Tue Dec 16 2014 - 12:04:15 CET