diff options
Diffstat (limited to 'busybox/miscutils/crond.c')
| -rw-r--r-- | busybox/miscutils/crond.c | 1055 |
1 files changed, 1055 insertions, 0 deletions
diff --git a/busybox/miscutils/crond.c b/busybox/miscutils/crond.c new file mode 100644 index 0000000..085cf6e --- /dev/null +++ b/busybox/miscutils/crond.c @@ -0,0 +1,1055 @@ +/* + * crond -d[#] -c <crondir> -f -b + * + * run as root, but NOT setuid root + * + * Copyright 1994 Matthew Dillon (dillon@apollo.west.oic.com) + * May be distributed under the GNU General Public License + * + * Vladimir Oleynik <dzo@simtreas.ru> (C) 2002 to be used in busybox + */ + +#define VERSION "2.3.2" + +#undef FEATURE_DEBUG_OPT + + +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> +#include <errno.h> +#include <time.h> +#include <dirent.h> +#include <fcntl.h> +#include <unistd.h> +#include <syslog.h> +#include <signal.h> +#include <getopt.h> +#include <sys/ioctl.h> +#include <sys/wait.h> +#include <sys/stat.h> +#include <sys/resource.h> + +#include "busybox.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 + +#ifdef FEATURE_DEBUG_OPT +static short DebugOpt; +#endif + +static short 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); + +#ifdef CONFIG_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) { + +#ifdef FEATURE_DEBUG_OPT + 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, 600); + if (logfd >= 0) { + vdprintf(logfd, fmt, va); + close(logfd); +#ifdef FEATURE_DEBUG_OPT + } 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) +{ + unsigned long opt; + char *lopt, *Lopt, *copt; + +#ifdef FEATURE_DEBUG_OPT + char *dopt; + + bb_opt_complementaly = "f-b:b-f:S-L:L-S:d-l"; +#else + bb_opt_complementaly = "f-b:b-f:S-L:L-S"; +#endif + + opterr = 0; /* disable getopt 'errors' message. */ + opt = bb_getopt_ulflags(ac, av, "l:L:fbSc:" +#ifdef FEATURE_DEBUG_OPT + "d:" +#endif + , &lopt, &Lopt, &copt +#ifdef FEATURE_DEBUG_OPT + , &dopt +#endif + ); + if (opt & 1) { + LogLevel = atoi(lopt); + } + if (opt & 2) { + if (*Lopt != 0) { + LogFile = Lopt; + } + } + if (opt & 32) { + if (*copt != 0) { + CDir = copt; + } + } +#ifdef FEATURE_DEBUG_OPT + if (opt & 64) { + DebugOpt = atoi(dopt); + LogLevel = 0; + } +#endif + + /* + * change directory + */ + + if (chdir(CDir) != 0) { + bb_perror_msg_and_die("%s", 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)) { +#if defined(__uClinux__) + /* reexec for vfork() do continue parent */ + vfork_daemon_rexec(1, 0, ac, av, "-f"); +#else /* uClinux */ + if (daemon(1, 0) < 0) { + bb_perror_msg_and_die("daemon"); + } +#endif /* uClinux */ + } + + (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", + bb_applet_name, LogLevel); + + SynchronizeDir(); + + { + time_t t1 = time(NULL); + time_t t2; + long dt; + short 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(); +#ifdef FEATURE_DEBUG_OPT + 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; + } + } + } + /* not reached */ +} + +#if defined(FEATURE_DEBUG_OPT) || defined(CONFIG_FEATURE_CROND_CALL_SENDMAIL) +/* + write to temp file.. +*/ +static void fdprintf(int fd, const char *ctl, ...) +{ + va_list va; + + va_start(va, ctl); + vdprintf(fd, ctl, va); + va_end(va); +} +#endif + + +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(bb_applet_name, LOG_CONS | LOG_PID, LOG_CRON); + } +#ifdef FEATURE_DEBUG_OPT + else { /* test logfile */ + int logfd; + + if ((logfd = open(LogFile, O_WRONLY | O_CREAT | O_APPEND, 600)) >= 0) { + close(logfd); + } else { + bb_perror_msg("Failed to open log file '%s' reason", 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; + } +#ifdef FEATURE_DEBUG_OPT + 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) +{ + short i; + short weekUsed = 0; + short daysUsed = 0; + + for (i = 0; i < arysize(line->cl_Dow); ++i) { + if (line->cl_Dow[i] == 0) { + weekUsed = 1; + break; + } + } + for (i = 0; i < 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 = calloc(1, 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; + + if (buf[0]) { + buf[strlen(buf) - 1] = 0; + } + if (buf[0] == 0 || buf[0] == '#' || buf[0] == ' ' || buf[0] == '\t') { + continue; + } + if (--maxEntries == 0) { + break; + } + memset(&line, 0, sizeof(line)); + +#ifdef FEATURE_DEBUG_OPT + 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 = calloc(1, sizeof(CronLine)); + **pline = line; + + /* copy command */ + (*pline)->cl_Shell = strdup(ptr); + +#ifdef FEATURE_DEBUG_OPT + 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("\311unable to 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("\311Unable to 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) +{ + short 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) { +#ifdef FEATURE_DEBUG_OPT + 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) { +#ifdef FEATURE_DEBUG_OPT + 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]) { +#ifdef FEATURE_DEBUG_OPT + 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); +} + + +#ifdef CONFIG_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); + } +#ifdef FEATURE_DEBUG_OPT + 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("\024unable to 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("\024couldn't 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, 1); + } else { + crondlog("\024unable to 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); + } +#ifdef FEATURE_DEBUG_OPT + if (DebugOpt) { + crondlog("\005Child Running %s\n", DEFAULT_SHELL); + } +#endif + + execl(DEFAULT_SHELL, DEFAULT_SHELL, "-c", line->cl_Shell, NULL); + crondlog("\024unable to exec, user %s cmd %s -c %s\n", user, + DEFAULT_SHELL, line->cl_Shell); + exit(0); + } else if (pid < 0) { + /* FORK FAILED */ + crondlog("\024couldn't fork, user %s\n", user); + pid = 0; + } + line->cl_Pid = pid; +} +#endif /* CONFIG_FEATURE_CROND_CALL_SENDMAIL */ |