diff options
| -rw-r--r-- | miscutils/crond.c | 67 |
1 files changed, 31 insertions, 36 deletions
diff --git a/miscutils/crond.c b/miscutils/crond.c index 2872256..a459c6a 100644 --- a/miscutils/crond.c +++ b/miscutils/crond.c @@ -29,7 +29,7 @@ # define SENDMAIL "sendmail" #endif #ifndef SENDMAIL_ARGS -# define SENDMAIL_ARGS "-ti", NULL +# define SENDMAIL_ARGS "-ti" #endif #ifndef CRONUPDATE # define CRONUPDATE "cron.update" @@ -53,9 +53,8 @@ typedef struct CronLine { char *cl_cmd; /* shell command */ pid_t cl_pid; /* >0:running, <0:needs to be started in this minute, 0:dormant */ #if ENABLE_FEATURE_CROND_CALL_SENDMAIL - int cl_empty_mail_size; /* size of mail header only */ + int cl_empty_mail_size; /* size of mail header only, 0 if no mailfile */ char *cl_mailto; /* whom to mail results, may be NULL */ - smallint cl_mail_result; /* mail file is created, need to send it on completion */ #endif /* ordered by size, not in natural order. makes code smaller: */ char cl_Dow[7]; /* 0-6, beginning sunday */ @@ -536,13 +535,11 @@ static void change_user(struct passwd *pas) // TODO: sendmail should be _run-time_ option, not compile-time! #if ENABLE_FEATURE_CROND_CALL_SENDMAIL -//TODO: return pid (and stop passing line); -// stop passing mail_filename here but process it in caller -static void -fork_job(const char *user, CronLine *line, int mailFd, - const char *prog, const char *cmd, const char *arg, - const char *mail_filename) -{ +static pid_t +fork_job(const char *user, int mailFd, + const char *prog, + const char *shell_cmd /* if NULL, we run sendmail */ +) { struct passwd *pas; pid_t pid; @@ -563,37 +560,25 @@ fork_job(const char *user, CronLine *line, int mailFd, crondlog(LVL5 "child running %s", prog); } if (mailFd >= 0) { - xmove_fd(mailFd, mail_filename ? 1 : 0); + xmove_fd(mailFd, shell_cmd ? 1 : 0); dup2(1, 2); } /* crond 3.0pl1-100 puts tasks in separate process groups */ bb_setpgrp(); - execlp(prog, prog, cmd, arg, (char *) 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); + execlp(prog, prog, (shell_cmd ? "-c" : SENDMAIL_ARGS), shell_cmd, (char *) NULL); + crondlog(ERR20 "can't execute '%s' for user %s", prog, user); + if (shell_cmd) { + fdprintf(1, "Exec failed: %s -c %s\n", prog, shell_cmd); } _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 { - /* PARENT, FORK SUCCESS */ - if (mail_filename) { - /* rename mail-file based on pid of process */ - char *mailFile2 = xasprintf("%s/cron.%s.%d", TMPDIR, user, (int)pid); - rename(mail_filename, mailFile2); // TODO: xrename? - free(mailFile2); - } - } + pid = 0; + } /* else: PARENT, FORK SUCCESS */ /* * Close the mail file descriptor.. we can't just leave it open in @@ -602,6 +587,7 @@ fork_job(const char *user, CronLine *line, int mailFd, if (mailFd >= 0) { close(mailFd); } + return pid; } static void start_one_job(const char *user, CronLine *line) @@ -610,7 +596,7 @@ static void start_one_job(const char *user, CronLine *line) int mailFd = -1; line->cl_pid = 0; - line->cl_mail_result = 0; + line->cl_empty_mail_size = 0; if (line->cl_mailto) { /* Open mail file (owner is root so nobody can screw with it) */ @@ -618,7 +604,6 @@ static void start_one_job(const char *user, CronLine *line) mailFd = open(mailFile, O_CREAT | O_TRUNC | O_WRONLY | O_EXCL | O_APPEND, 0600); if (mailFd >= 0) { - line->cl_mail_result = 1; fdprintf(mailFd, "To: %s\nSubject: cron: %s\n\n", line->cl_mailto, line->cl_cmd); line->cl_empty_mail_size = lseek(mailFd, 0, SEEK_CUR); @@ -628,7 +613,17 @@ static void start_one_job(const char *user, CronLine *line) } } - fork_job(user, line, mailFd, DEFAULT_SHELL, "-c", line->cl_cmd, mailFile); + line->cl_pid = fork_job(user, mailFd, DEFAULT_SHELL, line->cl_cmd); + if (mailFd >= 0) { + if (line->cl_pid <= 0) { + unlink(mailFile); + } else { + /* rename mail-file based on pid of process */ + char *mailFile2 = xasprintf("%s/cron.%s.%d", TMPDIR, user, (int)line->cl_pid); + rename(mailFile, mailFile2); // TODO: xrename? + free(mailFile2); + } + } } /* @@ -647,11 +642,10 @@ static void process_finished_job(const char *user, CronLine *line) /* No job */ return; } - if (line->cl_mail_result == 0) { + if (line->cl_empty_mail_size <= 0) { /* End of job and no mail file, or end of sendmail job */ return; } - line->cl_mail_result = 0; /* * End of primary job - check for mail file. @@ -673,8 +667,9 @@ static void process_finished_job(const char *user, CronLine *line) close(mailFd); return; } - /* if (line->cl_mailto) - always true if cl_mail_result was true */ - fork_job(user, line, mailFd, SENDMAIL, SENDMAIL_ARGS, NULL); + line->cl_empty_mail_size = 0; + /* if (line->cl_mailto) - always true if cl_empty_mail_size was nonzero */ + line->cl_pid = fork_job(user, mailFd, SENDMAIL, NULL); } #else /* !ENABLE_FEATURE_CROND_CALL_SENDMAIL */ |