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Diffstat (limited to 'i/pc104/initrd/conf/busybox/miscutils/crond.c')
-rw-r--r--i/pc104/initrd/conf/busybox/miscutils/crond.c1017
1 files changed, 1017 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/miscutils/crond.c b/i/pc104/initrd/conf/busybox/miscutils/crond.c
new file mode 100644
index 0000000..d237a67
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/miscutils/crond.c
@@ -0,0 +1,1017 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * crond -d[#] -c <crondir> -f -b
+ *
+ * run as root, but NOT setuid root
+ *
+ * Copyright 1994 Matthew Dillon (dillon@apollo.west.oic.com)
+ * Vladimir Oleynik <dzo@simtreas.ru> (C) 2002
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ */
+
+#define VERSION "2.3.2"
+
+#include "busybox.h"
+#include <sys/syslog.h>
+
+#define arysize(ary) (sizeof(ary)/sizeof((ary)[0]))
+
+#ifndef CRONTABS
+#define CRONTABS "/var/spool/cron/crontabs"
+#endif
+#ifndef TMPDIR
+#define TMPDIR "/var/spool/cron"
+#endif
+#ifndef SENDMAIL
+#define SENDMAIL "/usr/sbin/sendmail"
+#endif
+#ifndef SENDMAIL_ARGS
+#define SENDMAIL_ARGS "-ti", "oem"
+#endif
+#ifndef CRONUPDATE
+#define CRONUPDATE "cron.update"
+#endif
+#ifndef MAXLINES
+#define MAXLINES 256 /* max lines in non-root crontabs */
+#endif
+
+typedef struct CronFile {
+ struct CronFile *cf_Next;
+ struct CronLine *cf_LineBase;
+ char *cf_User; /* username */
+ int cf_Ready; /* bool: one or more jobs ready */
+ int cf_Running; /* bool: one or more jobs running */
+ int cf_Deleted; /* marked for deletion, ignore */
+} CronFile;
+
+typedef struct CronLine {
+ struct CronLine *cl_Next;
+ char *cl_Shell; /* shell command */
+ pid_t cl_Pid; /* running pid, 0, or armed (-1) */
+ int cl_MailFlag; /* running pid is for mail */
+ int cl_MailPos; /* 'empty file' size */
+ char cl_Mins[60]; /* 0-59 */
+ char cl_Hrs[24]; /* 0-23 */
+ char cl_Days[32]; /* 1-31 */
+ char cl_Mons[12]; /* 0-11 */
+ char cl_Dow[7]; /* 0-6, beginning sunday */
+} CronLine;
+
+#define RUN_RANOUT 1
+#define RUN_RUNNING 2
+#define RUN_FAILED 3
+
+#define DaemonUid 0
+
+#if ENABLE_DEBUG_CROND_OPTION
+static unsigned DebugOpt;
+#endif
+
+static unsigned LogLevel = 8;
+static const char *LogFile;
+static const char *CDir = CRONTABS;
+
+static void startlogger(void);
+
+static void CheckUpdates(void);
+static void SynchronizeDir(void);
+static int TestJobs(time_t t1, time_t t2);
+static void RunJobs(void);
+static int CheckJobs(void);
+
+static void RunJob(const char *user, CronLine * line);
+
+#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
+static void EndJob(const char *user, CronLine * line);
+#else
+#define EndJob(user, line) line->cl_Pid = 0
+#endif
+
+static void DeleteFile(const char *userName);
+
+static CronFile *FileBase;
+
+
+static void crondlog(const char *ctl, ...)
+{
+ va_list va;
+ const char *fmt;
+ int level = (int) (ctl[0] & 0xf);
+ int type = level == 20 ?
+ LOG_ERR : ((ctl[0] & 0100) ? LOG_WARNING : LOG_NOTICE);
+
+
+ va_start(va, ctl);
+ fmt = ctl + 1;
+ if (level >= LogLevel) {
+
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt) {
+ vfprintf(stderr, fmt, va);
+ } else
+#endif
+ if (LogFile == 0) {
+ vsyslog(type, fmt, va);
+ } else {
+ int logfd = open(LogFile, O_WRONLY | O_CREAT | O_APPEND, 0600);
+ if (logfd >= 0) {
+ vdprintf(logfd, fmt, va);
+ close(logfd);
+#if ENABLE_DEBUG_CROND_OPTION
+ } else {
+ bb_perror_msg("can't open log file");
+#endif
+ }
+ }
+ }
+ va_end(va);
+ if (ctl[0] & 0200) {
+ exit(20);
+ }
+}
+
+int crond_main(int ac, char **av);
+int crond_main(int ac, char **av)
+{
+ unsigned opt;
+ char *lopt, *Lopt, *copt;
+
+#if ENABLE_DEBUG_CROND_OPTION
+ char *dopt;
+
+ opt_complementary = "f-b:b-f:S-L:L-S:d-l";
+#else
+ opt_complementary = "f-b:b-f:S-L:L-S";
+#endif
+
+ opterr = 0; /* disable getopt 'errors' message. */
+ opt = getopt32(ac, av, "l:L:fbSc:"
+#if ENABLE_DEBUG_CROND_OPTION
+ "d:"
+#endif
+ , &lopt, &Lopt, &copt
+#if ENABLE_DEBUG_CROND_OPTION
+ , &dopt
+#endif
+ );
+ if (opt & 1) {
+ LogLevel = xatou(lopt);
+ }
+ if (opt & 2) {
+ if (*Lopt != 0) {
+ LogFile = Lopt;
+ }
+ }
+ if (opt & 32) {
+ if (*copt != 0) {
+ CDir = copt;
+ }
+ }
+#if ENABLE_DEBUG_CROND_OPTION
+ if (opt & 64) {
+ DebugOpt = xatou(dopt);
+ LogLevel = 0;
+ }
+#endif
+
+ /*
+ * change directory
+ */
+
+ xchdir(CDir);
+ signal(SIGHUP, SIG_IGN); /* hmm.. but, if kill -HUP original
+ * version - his died. ;(
+ */
+ /*
+ * close stdin and stdout, stderr.
+ * close unused descriptors - don't need.
+ * optional detach from controlling terminal
+ */
+
+ if (!(opt & 4)) {
+#ifdef BB_NOMMU
+ /* reexec for vfork() do continue parent */
+ vfork_daemon_rexec(1, 0, ac, av, "-f");
+#else
+ xdaemon(1, 0);
+#endif
+ }
+
+ (void) startlogger(); /* need if syslog mode selected */
+
+ /*
+ * main loop - synchronize to 1 second after the minute, minimum sleep
+ * of 1 second.
+ */
+
+ crondlog("\011%s " VERSION " dillon, started, log level %d\n",
+ applet_name, LogLevel);
+
+ SynchronizeDir();
+
+ {
+ time_t t1 = time(NULL);
+ time_t t2;
+ long dt;
+ int rescan = 60;
+ short sleep_time = 60;
+
+ for (;;) {
+ sleep((sleep_time + 1) - (short) (time(NULL) % sleep_time));
+
+ t2 = time(NULL);
+ dt = t2 - t1;
+
+ /*
+ * The file 'cron.update' is checked to determine new cron
+ * jobs. The directory is rescanned once an hour to deal
+ * with any screwups.
+ *
+ * check for disparity. Disparities over an hour either way
+ * result in resynchronization. A reverse-indexed disparity
+ * less then an hour causes us to effectively sleep until we
+ * match the original time (i.e. no re-execution of jobs that
+ * have just been run). A forward-indexed disparity less then
+ * an hour causes intermediate jobs to be run, but only once
+ * in the worst case.
+ *
+ * when running jobs, the inequality used is greater but not
+ * equal to t1, and less then or equal to t2.
+ */
+
+ if (--rescan == 0) {
+ rescan = 60;
+ SynchronizeDir();
+ }
+ CheckUpdates();
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt)
+ crondlog("\005Wakeup dt=%d\n", dt);
+#endif
+ if (dt < -60 * 60 || dt > 60 * 60) {
+ t1 = t2;
+ crondlog("\111time disparity of %d minutes detected\n", dt / 60);
+ } else if (dt > 0) {
+ TestJobs(t1, t2);
+ RunJobs();
+ sleep(5);
+ if (CheckJobs() > 0) {
+ sleep_time = 10;
+ } else {
+ sleep_time = 60;
+ }
+ t1 = t2;
+ }
+ }
+ }
+ return 0; /* not reached */
+}
+
+static int ChangeUser(const char *user)
+{
+ struct passwd *pas;
+ const char *err_msg;
+
+ /*
+ * Obtain password entry and change privileges
+ */
+ pas = getpwnam(user);
+ if (pas == 0) {
+ crondlog("\011failed to get uid for %s", user);
+ return -1;
+ }
+ setenv("USER", pas->pw_name, 1);
+ setenv("HOME", pas->pw_dir, 1);
+ setenv("SHELL", DEFAULT_SHELL, 1);
+
+ /*
+ * Change running state to the user in question
+ */
+ err_msg = change_identity_e2str(pas);
+ if (err_msg) {
+ crondlog("\011%s for user %s", err_msg, user);
+ return -1;
+ }
+ if (chdir(pas->pw_dir) < 0) {
+ crondlog("\011chdir failed: %s: %m", pas->pw_dir);
+ if (chdir(TMPDIR) < 0) {
+ crondlog("\011chdir failed: %s: %m", TMPDIR);
+ return -1;
+ }
+ }
+ return pas->pw_uid;
+}
+
+static void startlogger(void)
+{
+ if (LogFile == 0) {
+ openlog(applet_name, LOG_CONS | LOG_PID, LOG_CRON);
+ }
+#if ENABLE_DEBUG_CROND_OPTION
+ else { /* test logfile */
+ int logfd;
+
+ if ((logfd = open(LogFile, O_WRONLY | O_CREAT | O_APPEND, 0600)) >= 0) {
+ close(logfd);
+ } else {
+ bb_perror_msg("failed to open log file '%s': ", LogFile);
+ }
+ }
+#endif
+}
+
+
+static const char *const DowAry[] = {
+ "sun",
+ "mon",
+ "tue",
+ "wed",
+ "thu",
+ "fri",
+ "sat",
+
+ "Sun",
+ "Mon",
+ "Tue",
+ "Wed",
+ "Thu",
+ "Fri",
+ "Sat",
+ NULL
+};
+
+static const char *const MonAry[] = {
+ "jan",
+ "feb",
+ "mar",
+ "apr",
+ "may",
+ "jun",
+ "jul",
+ "aug",
+ "sep",
+ "oct",
+ "nov",
+ "dec",
+
+ "Jan",
+ "Feb",
+ "Mar",
+ "Apr",
+ "May",
+ "Jun",
+ "Jul",
+ "Aug",
+ "Sep",
+ "Oct",
+ "Nov",
+ "Dec",
+ NULL
+};
+
+static char *ParseField(char *user, char *ary, int modvalue, int off,
+ const char *const *names, char *ptr)
+{
+ char *base = ptr;
+ int n1 = -1;
+ int n2 = -1;
+
+ if (base == NULL) {
+ return NULL;
+ }
+
+ while (*ptr != ' ' && *ptr != '\t' && *ptr != '\n') {
+ int skip = 0;
+
+ /* Handle numeric digit or symbol or '*' */
+
+ if (*ptr == '*') {
+ n1 = 0; /* everything will be filled */
+ n2 = modvalue - 1;
+ skip = 1;
+ ++ptr;
+ } else if (*ptr >= '0' && *ptr <= '9') {
+ if (n1 < 0) {
+ n1 = strtol(ptr, &ptr, 10) + off;
+ } else {
+ n2 = strtol(ptr, &ptr, 10) + off;
+ }
+ skip = 1;
+ } else if (names) {
+ int i;
+
+ for (i = 0; names[i]; ++i) {
+ if (strncmp(ptr, names[i], strlen(names[i])) == 0) {
+ break;
+ }
+ }
+ if (names[i]) {
+ ptr += strlen(names[i]);
+ if (n1 < 0) {
+ n1 = i;
+ } else {
+ n2 = i;
+ }
+ skip = 1;
+ }
+ }
+
+ /* handle optional range '-' */
+
+ if (skip == 0) {
+ crondlog("\111failed user %s parsing %s\n", user, base);
+ return NULL;
+ }
+ if (*ptr == '-' && n2 < 0) {
+ ++ptr;
+ continue;
+ }
+
+ /*
+ * collapse single-value ranges, handle skipmark, and fill
+ * in the character array appropriately.
+ */
+
+ if (n2 < 0) {
+ n2 = n1;
+ }
+ if (*ptr == '/') {
+ skip = strtol(ptr + 1, &ptr, 10);
+ }
+ /*
+ * fill array, using a failsafe is the easiest way to prevent
+ * an endless loop
+ */
+
+ {
+ int s0 = 1;
+ int failsafe = 1024;
+
+ --n1;
+ do {
+ n1 = (n1 + 1) % modvalue;
+
+ if (--s0 == 0) {
+ ary[n1 % modvalue] = 1;
+ s0 = skip;
+ }
+ }
+ while (n1 != n2 && --failsafe);
+
+ if (failsafe == 0) {
+ crondlog("\111failed user %s parsing %s\n", user, base);
+ return NULL;
+ }
+ }
+ if (*ptr != ',') {
+ break;
+ }
+ ++ptr;
+ n1 = -1;
+ n2 = -1;
+ }
+
+ if (*ptr != ' ' && *ptr != '\t' && *ptr != '\n') {
+ crondlog("\111failed user %s parsing %s\n", user, base);
+ return NULL;
+ }
+
+ while (*ptr == ' ' || *ptr == '\t' || *ptr == '\n') {
+ ++ptr;
+ }
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt) {
+ int i;
+
+ for (i = 0; i < modvalue; ++i) {
+ crondlog("\005%d", ary[i]);
+ }
+ crondlog("\005\n");
+ }
+#endif
+
+ return ptr;
+}
+
+static void FixDayDow(CronLine * line)
+{
+ int i;
+ int weekUsed = 0;
+ int daysUsed = 0;
+
+ for (i = 0; i < (int)(arysize(line->cl_Dow)); ++i) {
+ if (line->cl_Dow[i] == 0) {
+ weekUsed = 1;
+ break;
+ }
+ }
+ for (i = 0; i < (int)(arysize(line->cl_Days)); ++i) {
+ if (line->cl_Days[i] == 0) {
+ daysUsed = 1;
+ break;
+ }
+ }
+ if (weekUsed && !daysUsed) {
+ memset(line->cl_Days, 0, sizeof(line->cl_Days));
+ }
+ if (daysUsed && !weekUsed) {
+ memset(line->cl_Dow, 0, sizeof(line->cl_Dow));
+ }
+}
+
+
+
+static void SynchronizeFile(const char *fileName)
+{
+ int maxEntries = MAXLINES;
+ int maxLines;
+ char buf[1024];
+
+ if (strcmp(fileName, "root") == 0) {
+ maxEntries = 65535;
+ }
+ maxLines = maxEntries * 10;
+
+ if (fileName) {
+ FILE *fi;
+
+ DeleteFile(fileName);
+
+ fi = fopen(fileName, "r");
+ if (fi != NULL) {
+ struct stat sbuf;
+
+ if (fstat(fileno(fi), &sbuf) == 0 && sbuf.st_uid == DaemonUid) {
+ CronFile *file = xzalloc(sizeof(CronFile));
+ CronLine **pline;
+
+ file->cf_User = strdup(fileName);
+ pline = &file->cf_LineBase;
+
+ while (fgets(buf, sizeof(buf), fi) != NULL && --maxLines) {
+ CronLine line;
+ char *ptr;
+
+ trim(buf);
+ if (buf[0] == 0 || buf[0] == '#') {
+ continue;
+ }
+ if (--maxEntries == 0) {
+ break;
+ }
+ memset(&line, 0, sizeof(line));
+
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt) {
+ crondlog("\111User %s Entry %s\n", fileName, buf);
+ }
+#endif
+
+ /* parse date ranges */
+ ptr = ParseField(file->cf_User, line.cl_Mins, 60, 0, NULL, buf);
+ ptr = ParseField(file->cf_User, line.cl_Hrs, 24, 0, NULL, ptr);
+ ptr = ParseField(file->cf_User, line.cl_Days, 32, 0, NULL, ptr);
+ ptr = ParseField(file->cf_User, line.cl_Mons, 12, -1, MonAry, ptr);
+ ptr = ParseField(file->cf_User, line.cl_Dow, 7, 0, DowAry, ptr);
+
+ /* check failure */
+ if (ptr == NULL) {
+ continue;
+ }
+
+ /*
+ * fix days and dow - if one is not * and the other
+ * is *, the other is set to 0, and vise-versa
+ */
+
+ FixDayDow(&line);
+
+ *pline = xzalloc(sizeof(CronLine));
+ **pline = line;
+
+ /* copy command */
+ (*pline)->cl_Shell = strdup(ptr);
+
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt) {
+ crondlog("\111 Command %s\n", ptr);
+ }
+#endif
+
+ pline = &((*pline)->cl_Next);
+ }
+ *pline = NULL;
+
+ file->cf_Next = FileBase;
+ FileBase = file;
+
+ if (maxLines == 0 || maxEntries == 0) {
+ crondlog("\111Maximum number of lines reached for user %s\n", fileName);
+ }
+ }
+ fclose(fi);
+ }
+ }
+}
+
+static void CheckUpdates(void)
+{
+ FILE *fi;
+ char buf[256];
+
+ fi = fopen(CRONUPDATE, "r");
+ if (fi != NULL) {
+ remove(CRONUPDATE);
+ while (fgets(buf, sizeof(buf), fi) != NULL) {
+ SynchronizeFile(strtok(buf, " \t\r\n"));
+ }
+ fclose(fi);
+ }
+}
+
+static void SynchronizeDir(void)
+{
+ /* Attempt to delete the database. */
+
+ for (;;) {
+ CronFile *file;
+
+ for (file = FileBase; file && file->cf_Deleted; file = file->cf_Next);
+ if (file == NULL) {
+ break;
+ }
+ DeleteFile(file->cf_User);
+ }
+
+ /*
+ * Remove cron update file
+ *
+ * Re-chdir, in case directory was renamed & deleted, or otherwise
+ * screwed up.
+ *
+ * scan directory and add associated users
+ */
+
+ remove(CRONUPDATE);
+ if (chdir(CDir) < 0) {
+ crondlog("\311cannot find %s\n", CDir);
+ }
+ {
+ DIR *dir = opendir(".");
+ struct dirent *den;
+
+ if (dir) {
+ while ((den = readdir(dir))) {
+ if (strchr(den->d_name, '.') != NULL) {
+ continue;
+ }
+ if (getpwnam(den->d_name)) {
+ SynchronizeFile(den->d_name);
+ } else {
+ crondlog("\007ignoring %s\n", den->d_name);
+ }
+ }
+ closedir(dir);
+ } else {
+ crondlog("\311cannot open current dir!\n");
+ }
+ }
+}
+
+
+/*
+ * DeleteFile() - delete user database
+ *
+ * Note: multiple entries for same user may exist if we were unable to
+ * completely delete a database due to running processes.
+ */
+
+static void DeleteFile(const char *userName)
+{
+ CronFile **pfile = &FileBase;
+ CronFile *file;
+
+ while ((file = *pfile) != NULL) {
+ if (strcmp(userName, file->cf_User) == 0) {
+ CronLine **pline = &file->cf_LineBase;
+ CronLine *line;
+
+ file->cf_Running = 0;
+ file->cf_Deleted = 1;
+
+ while ((line = *pline) != NULL) {
+ if (line->cl_Pid > 0) {
+ file->cf_Running = 1;
+ pline = &line->cl_Next;
+ } else {
+ *pline = line->cl_Next;
+ free(line->cl_Shell);
+ free(line);
+ }
+ }
+ if (file->cf_Running == 0) {
+ *pfile = file->cf_Next;
+ free(file->cf_User);
+ free(file);
+ } else {
+ pfile = &file->cf_Next;
+ }
+ } else {
+ pfile = &file->cf_Next;
+ }
+ }
+}
+
+/*
+ * TestJobs()
+ *
+ * determine which jobs need to be run. Under normal conditions, the
+ * period is about a minute (one scan). Worst case it will be one
+ * hour (60 scans).
+ */
+
+static int TestJobs(time_t t1, time_t t2)
+{
+ int nJobs = 0;
+ time_t t;
+
+ /* Find jobs > t1 and <= t2 */
+
+ for (t = t1 - t1 % 60; t <= t2; t += 60) {
+ if (t > t1) {
+ struct tm *tp = localtime(&t);
+ CronFile *file;
+ CronLine *line;
+
+ for (file = FileBase; file; file = file->cf_Next) {
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt)
+ crondlog("\005FILE %s:\n", file->cf_User);
+#endif
+ if (file->cf_Deleted)
+ continue;
+ for (line = file->cf_LineBase; line; line = line->cl_Next) {
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt)
+ crondlog("\005 LINE %s\n", line->cl_Shell);
+#endif
+ if (line->cl_Mins[tp->tm_min] && line->cl_Hrs[tp->tm_hour] &&
+ (line->cl_Days[tp->tm_mday] || line->cl_Dow[tp->tm_wday])
+ && line->cl_Mons[tp->tm_mon]) {
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt) {
+ crondlog("\005 JobToDo: %d %s\n",
+ line->cl_Pid, line->cl_Shell);
+ }
+#endif
+ if (line->cl_Pid > 0) {
+ crondlog("\010 process already running: %s %s\n",
+ file->cf_User, line->cl_Shell);
+ } else if (line->cl_Pid == 0) {
+ line->cl_Pid = -1;
+ file->cf_Ready = 1;
+ ++nJobs;
+ }
+ }
+ }
+ }
+ }
+ }
+ return nJobs;
+}
+
+static void RunJobs(void)
+{
+ CronFile *file;
+ CronLine *line;
+
+ for (file = FileBase; file; file = file->cf_Next) {
+ if (file->cf_Ready) {
+ file->cf_Ready = 0;
+
+ for (line = file->cf_LineBase; line; line = line->cl_Next) {
+ if (line->cl_Pid < 0) {
+
+ RunJob(file->cf_User, line);
+
+ crondlog("\010USER %s pid %3d cmd %s\n",
+ file->cf_User, line->cl_Pid, line->cl_Shell);
+ if (line->cl_Pid < 0) {
+ file->cf_Ready = 1;
+ }
+ else if (line->cl_Pid > 0) {
+ file->cf_Running = 1;
+ }
+ }
+ }
+ }
+ }
+}
+
+/*
+ * CheckJobs() - check for job completion
+ *
+ * Check for job completion, return number of jobs still running after
+ * all done.
+ */
+
+static int CheckJobs(void)
+{
+ CronFile *file;
+ CronLine *line;
+ int nStillRunning = 0;
+
+ for (file = FileBase; file; file = file->cf_Next) {
+ if (file->cf_Running) {
+ file->cf_Running = 0;
+
+ for (line = file->cf_LineBase; line; line = line->cl_Next) {
+ if (line->cl_Pid > 0) {
+ int status;
+ int r = wait4(line->cl_Pid, &status, WNOHANG, NULL);
+
+ if (r < 0 || r == line->cl_Pid) {
+ EndJob(file->cf_User, line);
+ if (line->cl_Pid) {
+ file->cf_Running = 1;
+ }
+ } else if (r == 0) {
+ file->cf_Running = 1;
+ }
+ }
+ }
+ }
+ nStillRunning += file->cf_Running;
+ }
+ return nStillRunning;
+}
+
+
+#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
+static void
+ForkJob(const char *user, CronLine * line, int mailFd,
+ const char *prog, const char *cmd, const char *arg, const char *mailf)
+{
+ /* Fork as the user in question and run program */
+ pid_t pid = fork();
+
+ line->cl_Pid = pid;
+ if (pid == 0) {
+ /* CHILD */
+
+ /* Change running state to the user in question */
+
+ if (ChangeUser(user) < 0) {
+ exit(0);
+ }
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt) {
+ crondlog("\005Child Running %s\n", prog);
+ }
+#endif
+
+ if (mailFd >= 0) {
+ dup2(mailFd, mailf != NULL);
+ dup2((mailf ? mailFd : 1), 2);
+ close(mailFd);
+ }
+ execl(prog, prog, cmd, arg, NULL);
+ crondlog("\024cannot exec, user %s cmd %s %s %s\n", user, prog, cmd, arg);
+ if (mailf) {
+ fdprintf(1, "Exec failed: %s -c %s\n", prog, arg);
+ }
+ exit(0);
+ } else if (pid < 0) {
+ /* FORK FAILED */
+ crondlog("\024cannot fork, user %s\n", user);
+ line->cl_Pid = 0;
+ if (mailf) {
+ remove(mailf);
+ }
+ } else if (mailf) {
+ /* PARENT, FORK SUCCESS
+ * rename mail-file based on pid of process
+ */
+ char mailFile2[128];
+
+ snprintf(mailFile2, sizeof(mailFile2), TMPDIR "/cron.%s.%d", user, pid);
+ rename(mailf, mailFile2);
+ }
+ /*
+ * Close the mail file descriptor.. we can't just leave it open in
+ * a structure, closing it later, because we might run out of descriptors
+ */
+
+ if (mailFd >= 0) {
+ close(mailFd);
+ }
+}
+
+static void RunJob(const char *user, CronLine * line)
+{
+ char mailFile[128];
+ int mailFd;
+
+ line->cl_Pid = 0;
+ line->cl_MailFlag = 0;
+
+ /* open mail file - owner root so nobody can screw with it. */
+
+ snprintf(mailFile, sizeof(mailFile), TMPDIR "/cron.%s.%d", user, getpid());
+ mailFd = open(mailFile, O_CREAT | O_TRUNC | O_WRONLY | O_EXCL | O_APPEND, 0600);
+
+ if (mailFd >= 0) {
+ line->cl_MailFlag = 1;
+ fdprintf(mailFd, "To: %s\nSubject: cron: %s\n\n", user,
+ line->cl_Shell);
+ line->cl_MailPos = lseek(mailFd, 0, SEEK_CUR);
+ } else {
+ crondlog("\024cannot create mail file user %s file %s, output to /dev/null\n", user, mailFile);
+ }
+
+ ForkJob(user, line, mailFd, DEFAULT_SHELL, "-c", line->cl_Shell, mailFile);
+}
+
+/*
+ * EndJob - called when job terminates and when mail terminates
+ */
+
+static void EndJob(const char *user, CronLine * line)
+{
+ int mailFd;
+ char mailFile[128];
+ struct stat sbuf;
+
+ /* No job */
+
+ if (line->cl_Pid <= 0) {
+ line->cl_Pid = 0;
+ return;
+ }
+
+ /*
+ * End of job and no mail file
+ * End of sendmail job
+ */
+
+ snprintf(mailFile, sizeof(mailFile), TMPDIR "/cron.%s.%d", user, line->cl_Pid);
+ line->cl_Pid = 0;
+
+ if (line->cl_MailFlag != 1) {
+ return;
+ }
+ line->cl_MailFlag = 0;
+
+ /*
+ * End of primary job - check for mail file. If size has increased and
+ * the file is still valid, we sendmail it.
+ */
+
+ mailFd = open(mailFile, O_RDONLY);
+ remove(mailFile);
+ if (mailFd < 0) {
+ return;
+ }
+
+ if (fstat(mailFd, &sbuf) < 0 || sbuf.st_uid != DaemonUid || sbuf.st_nlink != 0 ||
+ sbuf.st_size == line->cl_MailPos || !S_ISREG(sbuf.st_mode)) {
+ close(mailFd);
+ return;
+ }
+ ForkJob(user, line, mailFd, SENDMAIL, SENDMAIL_ARGS, NULL);
+}
+#else
+/* crond without sendmail */
+
+static void RunJob(const char *user, CronLine * line)
+{
+ /* Fork as the user in question and run program */
+ pid_t pid = fork();
+
+ if (pid == 0) {
+ /* CHILD */
+
+ /* Change running state to the user in question */
+
+ if (ChangeUser(user) < 0) {
+ exit(0);
+ }
+#if ENABLE_DEBUG_CROND_OPTION
+ if (DebugOpt) {
+ crondlog("\005Child Running %s\n", DEFAULT_SHELL);
+ }
+#endif
+
+ execl(DEFAULT_SHELL, DEFAULT_SHELL, "-c", line->cl_Shell, NULL);
+ crondlog("\024cannot exec, user %s cmd %s -c %s\n", user,
+ DEFAULT_SHELL, line->cl_Shell);
+ exit(0);
+ } else if (pid < 0) {
+ /* FORK FAILED */
+ crondlog("\024cannot, user %s\n", user);
+ pid = 0;
+ }
+ line->cl_Pid = pid;
+}
+#endif /* ENABLE_FEATURE_CROND_CALL_SENDMAIL */