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-rw-r--r--miscutils/crond.c935
1 files changed, 0 insertions, 935 deletions
diff --git a/miscutils/crond.c b/miscutils/crond.c
deleted file mode 100644
index 732fbb1..0000000
--- a/miscutils/crond.c
+++ /dev/null
@@ -1,935 +0,0 @@
-/* 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)
- * (version 2.3.2)
- * Vladimir Oleynik <dzo@simtreas.ru> (C) 2002
- *
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
- */
-
-#include "libbb.h"
-#include <syslog.h>
-
-/* glibc frees previous setenv'ed value when we do next setenv()
- * of the same variable. uclibc does not do this! */
-#if (defined(__GLIBC__) && !defined(__UCLIBC__)) /* || OTHER_SAFE_LIBC... */
-#define SETENV_LEAKS 0
-#else
-#define SETENV_LEAKS 1
-#endif
-
-
-#ifndef CRONTABS
-#define CRONTABS "/var/spool/cron/crontabs"
-#endif
-#ifndef TMPDIR
-#define TMPDIR "/var/spool/cron"
-#endif
-#ifndef SENDMAIL
-#define SENDMAIL "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 */
- smallint cf_Ready; /* bool: one or more jobs ready */
- smallint cf_Running; /* bool: one or more jobs running */
- smallint 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) */
-#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
- int cl_MailPos; /* 'empty file' size */
- smallint cl_MailFlag; /* running pid is for mail */
- char *cl_MailTo; /* whom to mail results */
-#endif
- /* ordered by size, not in natural order. makes code smaller: */
- char cl_Dow[7]; /* 0-6, beginning sunday */
- char cl_Mons[12]; /* 0-11 */
- char cl_Hrs[24]; /* 0-23 */
- char cl_Days[32]; /* 1-31 */
- char cl_Mins[60]; /* 0-59 */
-} CronLine;
-
-
-#define DaemonUid 0
-
-
-enum {
- OPT_l = (1 << 0),
- OPT_L = (1 << 1),
- OPT_f = (1 << 2),
- OPT_b = (1 << 3),
- OPT_S = (1 << 4),
- OPT_c = (1 << 5),
- OPT_d = (1 << 6) * ENABLE_FEATURE_CROND_D,
-};
-#if ENABLE_FEATURE_CROND_D
-#define DebugOpt (option_mask32 & OPT_d)
-#else
-#define DebugOpt 0
-#endif
-
-
-struct globals {
- unsigned LogLevel; /* = 8; */
- const char *LogFile;
- const char *CDir; /* = CRONTABS; */
- CronFile *FileBase;
-#if SETENV_LEAKS
- char *env_var_user;
- char *env_var_home;
-#endif
-};
-#define G (*(struct globals*)&bb_common_bufsiz1)
-#define LogLevel (G.LogLevel )
-#define LogFile (G.LogFile )
-#define CDir (G.CDir )
-#define FileBase (G.FileBase )
-#define env_var_user (G.env_var_user )
-#define env_var_home (G.env_var_home )
-#define INIT_G() do { \
- LogLevel = 8; \
- CDir = CRONTABS; \
-} while (0)
-
-
-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);
-
-
-#define LVL5 "\x05"
-#define LVL7 "\x07"
-#define LVL8 "\x08"
-#define LVL9 "\x09"
-#define WARN9 "\x49"
-#define DIE9 "\xc9"
-/* level >= 20 is "error" */
-#define ERR20 "\x14"
-
-static void crondlog(const char *ctl, ...)
-{
- va_list va;
- int level = (ctl[0] & 0x1f);
-
- va_start(va, ctl);
- if (level >= (int)LogLevel) {
- /* Debug mode: all to (non-redirected) stderr, */
- /* Syslog mode: all to syslog (logmode = LOGMODE_SYSLOG), */
- if (!DebugOpt && LogFile) {
- /* Otherwise (log to file): we reopen log file at every write: */
- int logfd = open3_or_warn(LogFile, O_WRONLY | O_CREAT | O_APPEND, 0600);
- if (logfd >= 0)
- xmove_fd(logfd, STDERR_FILENO);
- }
-// TODO: ERR -> error, WARN -> warning, LVL -> info
- bb_verror_msg(ctl + 1, va, /* strerr: */ NULL);
- }
- va_end(va);
- if (ctl[0] & 0x80)
- exit(20);
-}
-
-int crond_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int crond_main(int argc UNUSED_PARAM, char **argv)
-{
- unsigned opt;
-
- INIT_G();
-
- /* "-b after -f is ignored", and so on for every pair a-b */
- opt_complementary = "f-b:b-f:S-L:L-S" USE_FEATURE_CROND_D(":d-l")
- ":l+:d+"; /* -l and -d have numeric param */
- opt = getopt32(argv, "l:L:fbSc:" USE_FEATURE_CROND_D("d:"),
- &LogLevel, &LogFile, &CDir
- USE_FEATURE_CROND_D(,&LogLevel));
- /* both -d N and -l N set the same variable: LogLevel */
-
- if (!(opt & OPT_f)) {
- /* close stdin, stdout, stderr.
- * close unused descriptors - don't need them. */
- bb_daemonize_or_rexec(DAEMON_CLOSE_EXTRA_FDS, argv);
- }
-
- if (!DebugOpt && LogFile == NULL) {
- /* logging to syslog */
- openlog(applet_name, LOG_CONS | LOG_PID, LOG_CRON);
- logmode = LOGMODE_SYSLOG;
- }
-
- xchdir(CDir);
- //signal(SIGHUP, SIG_IGN); /* ? original crond dies on HUP... */
- xsetenv("SHELL", DEFAULT_SHELL); /* once, for all future children */
- crondlog(LVL9 "crond (busybox "BB_VER") started, log level %d", LogLevel);
- SynchronizeDir();
-
- /* main loop - synchronize to 1 second after the minute, minimum sleep
- * of 1 second. */
- {
- time_t t1 = time(NULL);
- time_t t2;
- long dt;
- int rescan = 60;
- int sleep_time = 60;
-
- write_pidfile("/var/run/crond.pid");
- for (;;) {
- sleep((sleep_time + 1) - (time(NULL) % sleep_time));
-
- t2 = time(NULL);
- dt = (long)t2 - (long)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 (DebugOpt)
- crondlog(LVL5 "wakeup dt=%ld", dt);
- if (dt < -60 * 60 || dt > 60 * 60) {
- crondlog(WARN9 "time disparity of %d minutes detected", 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 */
-}
-
-#if SETENV_LEAKS
-/* We set environment *before* vfork (because we want to use vfork),
- * so we cannot use setenv() - repeated calls to setenv() may leak memory!
- * Using putenv(), and freeing memory after unsetenv() won't leak */
-static void safe_setenv4(char **pvar_val, const char *var, const char *val /*, int len*/)
-{
- const int len = 4; /* both var names are 4 char long */
- char *var_val = *pvar_val;
-
- if (var_val) {
- var_val[len] = '\0'; /* nuke '=' */
- unsetenv(var_val);
- free(var_val);
- }
- *pvar_val = xasprintf("%s=%s", var, val);
- putenv(*pvar_val);
-}
-#endif
-
-static void SetEnv(struct passwd *pas)
-{
-#if SETENV_LEAKS
- safe_setenv4(&env_var_user, "USER", pas->pw_name);
- safe_setenv4(&env_var_home, "HOME", pas->pw_dir);
- /* if we want to set user's shell instead: */
- /*safe_setenv(env_var_user, "SHELL", pas->pw_shell, 5);*/
-#else
- xsetenv("USER", pas->pw_name);
- xsetenv("HOME", pas->pw_dir);
-#endif
- /* currently, we use constant one: */
- /*setenv("SHELL", DEFAULT_SHELL, 1); - done earlier */
-}
-
-static void ChangeUser(struct passwd *pas)
-{
- /* careful: we're after vfork! */
- change_identity(pas); /* - initgroups, setgid, setuid */
- if (chdir(pas->pw_dir) < 0) {
- crondlog(LVL9 "can't chdir(%s)", pas->pw_dir);
- if (chdir(TMPDIR) < 0) {
- crondlog(DIE9 "can't chdir(%s)", TMPDIR); /* exits */
- }
- }
-}
-
-static const char DowAry[] ALIGN1 =
- "sun""mon""tue""wed""thu""fri""sat"
- /* "Sun""Mon""Tue""Wed""Thu""Fri""Sat" */
-;
-
-static const char MonAry[] ALIGN1 =
- "jan""feb""mar""apr""may""jun""jul""aug""sep""oct""nov""dec"
- /* "Jan""Feb""Mar""Apr""May""Jun""Jul""Aug""Sep""Oct""Nov""Dec" */
-;
-
-static void ParseField(char *user, char *ary, int modvalue, int off,
- const char *names, char *ptr)
-/* 'names' is a pointer to a set of 3-char abbreviations */
-{
- char *base = ptr;
- int n1 = -1;
- int n2 = -1;
-
- // this can't happen due to config_read()
- /*if (base == NULL)
- return;*/
-
- while (1) {
- 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 (isdigit(*ptr)) {
- 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 += 3) {
- /* was using strncmp before... */
- if (strncasecmp(ptr, &names[i], 3) == 0) {
- ptr += 3;
- if (n1 < 0) {
- n1 = i / 3;
- } else {
- n2 = i / 3;
- }
- skip = 1;
- break;
- }
- }
- }
-
- /* handle optional range '-' */
- if (skip == 0) {
- goto err;
- }
- 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;
- }
- if (--failsafe == 0) {
- goto err;
- }
- } while (n1 != n2);
-
- }
- if (*ptr != ',') {
- break;
- }
- ++ptr;
- n1 = -1;
- n2 = -1;
- }
-
- if (*ptr) {
- err:
- crondlog(WARN9 "user %s: parse error at %s", user, base);
- return;
- }
-
- if (DebugOpt && (LogLevel <= 5)) { /* like LVL5 */
- /* can't use crondlog, it inserts '\n' */
- int i;
- for (i = 0; i < modvalue; ++i)
- fprintf(stderr, "%d", (unsigned char)ary[i]);
- fputc('\n', stderr);
- }
-}
-
-static void FixDayDow(CronLine *line)
-{
- unsigned i;
- int weekUsed = 0;
- int daysUsed = 0;
-
- for (i = 0; i < ARRAY_SIZE(line->cl_Dow); ++i) {
- if (line->cl_Dow[i] == 0) {
- weekUsed = 1;
- break;
- }
- }
- for (i = 0; i < ARRAY_SIZE(line->cl_Days); ++i) {
- if (line->cl_Days[i] == 0) {
- daysUsed = 1;
- break;
- }
- }
- if (weekUsed != daysUsed) {
- if (weekUsed)
- memset(line->cl_Days, 0, sizeof(line->cl_Days));
- else /* daysUsed */
- memset(line->cl_Dow, 0, sizeof(line->cl_Dow));
- }
-}
-
-static void SynchronizeFile(const char *fileName)
-{
- struct parser_t *parser;
- struct stat sbuf;
- int maxLines;
- char *tokens[6];
-#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
- char *mailTo = NULL;
-#endif
-
- if (!fileName)
- return;
-
- DeleteFile(fileName);
- parser = config_open(fileName);
- if (!parser)
- return;
-
- maxLines = (strcmp(fileName, "root") == 0) ? 65535 : MAXLINES;
-
- if (fstat(fileno(parser->fp), &sbuf) == 0 && sbuf.st_uid == DaemonUid) {
- CronFile *file = xzalloc(sizeof(CronFile));
- CronLine **pline;
- int n;
-
- file->cf_User = xstrdup(fileName);
- pline = &file->cf_LineBase;
-
- while (1) {
- CronLine *line;
-
- if (!--maxLines)
- break;
- n = config_read(parser, tokens, 6, 1, "# \t", PARSE_NORMAL | PARSE_KEEP_COPY);
- if (!n)
- break;
-
- if (DebugOpt)
- crondlog(LVL5 "user:%s entry:%s", fileName, parser->data);
-
- /* check if line is setting MAILTO= */
- if (0 == strncmp(tokens[0], "MAILTO=", 7)) {
-#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
- free(mailTo);
- mailTo = (tokens[0][7]) ? xstrdup(&tokens[0][7]) : NULL;
-#endif /* otherwise just ignore such lines */
- continue;
- }
- /* check if a minimum of tokens is specified */
- if (n < 6)
- continue;
- *pline = line = xzalloc(sizeof(*line));
- /* parse date ranges */
- ParseField(file->cf_User, line->cl_Mins, 60, 0, NULL, tokens[0]);
- ParseField(file->cf_User, line->cl_Hrs, 24, 0, NULL, tokens[1]);
- ParseField(file->cf_User, line->cl_Days, 32, 0, NULL, tokens[2]);
- ParseField(file->cf_User, line->cl_Mons, 12, -1, MonAry, tokens[3]);
- ParseField(file->cf_User, line->cl_Dow, 7, 0, DowAry, tokens[4]);
- /*
- * fix days and dow - if one is not "*" and the other
- * is "*", the other is set to 0, and vise-versa
- */
- FixDayDow(line);
-#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
- /* copy mailto (can be NULL) */
- line->cl_MailTo = xstrdup(mailTo);
-#endif
- /* copy command */
- line->cl_Shell = xstrdup(tokens[5]);
- if (DebugOpt) {
- crondlog(LVL5 " command:%s", tokens[5]);
- }
- pline = &line->cl_Next;
-//bb_error_msg("M[%s]F[%s][%s][%s][%s][%s][%s]", mailTo, tokens[0], tokens[1], tokens[2], tokens[3], tokens[4], tokens[5]);
- }
- *pline = NULL;
-
- file->cf_Next = FileBase;
- FileBase = file;
-
- if (maxLines == 0) {
- crondlog(WARN9 "user %s: too many lines", fileName);
- }
- }
- config_close(parser);
-}
-
-static void CheckUpdates(void)
-{
- FILE *fi;
- char buf[256];
-
- fi = fopen_for_read(CRONUPDATE);
- if (fi != NULL) {
- unlink(CRONUPDATE);
- while (fgets(buf, sizeof(buf), fi) != NULL) {
- /* use first word only */
- SynchronizeFile(strtok(buf, " \t\r\n"));
- }
- fclose(fi);
- }
-}
-
-static void SynchronizeDir(void)
-{
- CronFile *file;
- /* Attempt to delete the database. */
- again:
- for (file = FileBase; file; file = file->cf_Next) {
- if (!file->cf_Deleted) {
- DeleteFile(file->cf_User);
- goto again;
- }
- }
-
- /*
- * Remove cron update file
- *
- * Re-chdir, in case directory was renamed & deleted, or otherwise
- * screwed up.
- *
- * scan directory and add associated users
- */
- unlink(CRONUPDATE);
- if (chdir(CDir) < 0) {
- crondlog(DIE9 "can't chdir(%s)", CDir);
- }
- {
- DIR *dir = opendir(".");
- struct dirent *den;
-
- if (!dir)
- crondlog(DIE9 "can't chdir(%s)", "."); /* exits */
- while ((den = readdir(dir)) != NULL) {
- if (strchr(den->d_name, '.') != NULL) {
- continue;
- }
- if (getpwnam(den->d_name)) {
- SynchronizeFile(den->d_name);
- } else {
- crondlog(LVL7 "ignoring %s", den->d_name);
- }
- }
- closedir(dir);
- }
-}
-
-/*
- * 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) {
- struct tm *tp;
- CronFile *file;
- CronLine *line;
-
- if (t <= t1)
- continue;
-
- tp = localtime(&t);
- for (file = FileBase; file; file = file->cf_Next) {
- if (DebugOpt)
- crondlog(LVL5 "file %s:", file->cf_User);
- if (file->cf_Deleted)
- continue;
- for (line = file->cf_LineBase; line; line = line->cl_Next) {
- if (DebugOpt)
- crondlog(LVL5 " line %s", line->cl_Shell);
- 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 (DebugOpt) {
- crondlog(LVL5 " job: %d %s",
- (int)line->cl_Pid, line->cl_Shell);
- }
- if (line->cl_Pid > 0) {
- crondlog(LVL8 "user %s: process already running: %s",
- 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)
- continue;
-
- file->cf_Ready = 0;
- for (line = file->cf_LineBase; line; line = line->cl_Next) {
- if (line->cl_Pid >= 0)
- continue;
-
- RunJob(file->cf_User, line);
- crondlog(LVL8 "USER %s pid %3d cmd %s",
- file->cf_User, (int)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) {
- int status, r;
- if (line->cl_Pid <= 0)
- continue;
-
- r = waitpid(line->cl_Pid, &status, WNOHANG);
- 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
-
-// TODO: sendmail should be _run-time_ option, not compile-time!
-
-static void
-ForkJob(const char *user, CronLine *line, int mailFd,
- const char *prog, const char *cmd, const char *arg,
- const char *mail_filename)
-{
- struct passwd *pas;
- pid_t pid;
-
- /* prepare things before vfork */
- pas = getpwnam(user);
- if (!pas) {
- crondlog(LVL9 "can't get uid for %s", user);
- goto err;
- }
- SetEnv(pas);
-
- pid = vfork();
- if (pid == 0) {
- /* CHILD */
- /* change running state to the user in question */
- ChangeUser(pas);
- if (DebugOpt) {
- crondlog(LVL5 "child running %s", prog);
- }
- if (mailFd >= 0) {
- xmove_fd(mailFd, mail_filename ? 1 : 0);
- dup2(1, 2);
- }
- /* crond 3.0pl1-100 puts tasks in separate process groups */
- bb_setpgrp();
- execlp(prog, prog, cmd, arg, NULL);
- crondlog(ERR20 "can't exec, user %s cmd %s %s %s", user, prog, cmd, arg);
- if (mail_filename) {
- fdprintf(1, "Exec failed: %s -c %s\n", prog, arg);
- }
- _exit(EXIT_SUCCESS);
- }
-
- line->cl_Pid = pid;
- if (pid < 0) {
- /* FORK FAILED */
- crondlog(ERR20 "can't vfork");
- err:
- line->cl_Pid = 0;
- if (mail_filename) {
- unlink(mail_filename);
- }
- } else if (mail_filename) {
- /* PARENT, FORK SUCCESS
- * rename mail-file based on pid of process
- */
- char mailFile2[128];
-
- snprintf(mailFile2, sizeof(mailFile2), "%s/cron.%s.%d", TMPDIR, user, pid);
- rename(mail_filename, mailFile2); // TODO: xrename?
- }
-
- /*
- * 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 = -1;
-
- line->cl_Pid = 0;
- line->cl_MailFlag = 0;
-
- if (line->cl_MailTo) {
- /* open mail file - owner root so nobody can screw with it. */
- snprintf(mailFile, sizeof(mailFile), "%s/cron.%s.%d", TMPDIR, 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", line->cl_MailTo,
- line->cl_Shell);
- line->cl_MailPos = lseek(mailFd, 0, SEEK_CUR);
- } else {
- crondlog(ERR20 "cannot create mail file %s for user %s, "
- "discarding output", mailFile, user);
- }
- }
-
- 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), "%s/cron.%s.%d", TMPDIR, user, line->cl_Pid);
- line->cl_Pid = 0;
-
- if (line->cl_MailFlag == 0) {
- 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);
- unlink(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;
- }
- if (line->cl_MailTo)
- ForkJob(user, line, mailFd, SENDMAIL, SENDMAIL_ARGS, NULL);
-}
-
-#else /* crond without sendmail */
-
-static void RunJob(const char *user, CronLine *line)
-{
- struct passwd *pas;
- pid_t pid;
-
- /* prepare things before vfork */
- pas = getpwnam(user);
- if (!pas) {
- crondlog(LVL9 "can't get uid for %s", user);
- goto err;
- }
- SetEnv(pas);
-
- /* fork as the user in question and run program */
- pid = vfork();
- if (pid == 0) {
- /* CHILD */
- /* change running state to the user in question */
- ChangeUser(pas);
- if (DebugOpt) {
- crondlog(LVL5 "child running %s", DEFAULT_SHELL);
- }
- /* crond 3.0pl1-100 puts tasks in separate process groups */
- bb_setpgrp();
- execl(DEFAULT_SHELL, DEFAULT_SHELL, "-c", line->cl_Shell, NULL);
- crondlog(ERR20 "can't exec, user %s cmd %s %s %s", user,
- DEFAULT_SHELL, "-c", line->cl_Shell);
- _exit(EXIT_SUCCESS);
- }
- if (pid < 0) {
- /* FORK FAILED */
- crondlog(ERR20 "can't vfork");
- err:
- pid = 0;
- }
- line->cl_Pid = pid;
-}
-
-#endif /* ENABLE_FEATURE_CROND_CALL_SENDMAIL */