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crond: add handling of "MAILTO=user" lines

Browse Source 
sendmail: handle a case when the whole mail comes from stdin
(and no separate sender/subj is provided)
both by dronnikov AT gmail.com

function                                             old     new   delta
sendgetmail_main                                    1509    1674    +165
SynchronizeFile                                      671     767     +96
packed_usage                                       24054   24088     +34
crond_main                                          1404    1420     +16
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 311/0)             Total: 311 bytes
This commit is contained in:
Denis Vlasenko 2008-04-07 21:02:35 +00:00
parent 90c31b3d4b
commit 6fa1ba3972
2 changed files with 67 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
miscutils/crond.c
View File

@ -33,8 +33,12 @@
#define SENDMAIL "sendmail"
#endif
#ifndef SENDMAIL_ARGS
# if ENABLE_SENDMAIL
# define SENDMAIL_ARGS "localhost", line->cl_MailTo
# else
# define SENDMAIL_ARGS "-ti", "oem"
# endif
#endif
#ifndef CRONUPDATE
#define CRONUPDATE "cron.update"
#endif
@ -59,6 +63,7 @@ typedef struct CronLine {
#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 */
@ -449,6 +454,9 @@ static void SynchronizeFile(const char *fileName)
int maxEntries;
int maxLines;
char buf[1024];
#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
char *mailTo = NULL;
#endif
if (!fileName)
return;
@ -485,6 +493,14 @@ static void SynchronizeFile(const char *fileName)
if (DebugOpt) {
crondlog(LVL5 "user:%s entry:%s", fileName, buf);
}
/* check if line is setting MAILTO= */
if (0 == strncmp("MAILTO=", buf, 7)) {
#if ENABLE_FEATURE_CROND_CALL_SENDMAIL
free(mailTo);
mailTo = (buf[7]) ? xstrdup(buf+7) : NULL;
#endif /* otherwise just ignore such lines */
continue;
}
*pline = line = xzalloc(sizeof(CronLine));
/* parse date ranges */
ptr = ParseField(file->cf_User, line->cl_Mins, 60, 0, NULL, buf);
@ -498,10 +514,14 @@ static void SynchronizeFile(const char *fileName)
continue;
}
/*
* fix days and dow - if one is not * and the other
* is *, the other is set to 0, and vise-versa
* 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(ptr);
if (DebugOpt) {
@ -515,7 +535,7 @@ static void SynchronizeFile(const char *fileName)
FileBase = file;
if (maxLines == 0 || maxEntries == 0) {
crondlog(WARN9 "maximum number of lines reached for user %s", fileName);
crondlog(WARN9 "user %s: too many lines", fileName);
}
}
fclose(fi);
@ -567,7 +587,7 @@ static void SynchronizeDir(void)
if (!dir)
crondlog(DIE9 "can't chdir(%s)", "."); /* exits */
while ((den = readdir(dir))) {
while ((den = readdir(dir)) != NULL) {
if (strchr(den->d_name, '.') != NULL) {
continue;
}
@ -811,11 +831,12 @@ ForkJob(const char *user, CronLine *line, int mailFd,
static void RunJob(const char *user, CronLine *line)
{
char mailFile[128];
int mailFd;
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);
@ -829,6 +850,7 @@ static void RunJob(const char *user, CronLine *line)
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);
}
@ -877,6 +899,7 @@ static void EndJob(const char *user, CronLine *line)
close(mailFd);
return;
}
if (line->cl_MailTo)
ForkJob(user, line, mailFd, SENDMAIL, SENDMAIL_ARGS, NULL);
}

28
networking/sendmail.c
View File

@ -273,6 +273,7 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
OPTS_c = 1 << 6, // sendmail: assumed charset
OPTS_t = 1 << 7, // sendmail: recipient(s)
OPTS_i = 1 << 8, // sendmail: ignore lone dots in message body (implied)
};
const char *options;
@ -288,8 +289,8 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
// SENDMAIL
// save initial stdin (body or attachements can be piped!)
xdup2(STDIN_FILENO, INITIAL_STDIN_FILENO);
opt_complementary = "-2:w+:t:t::"; // count(-t) > 0
options = "w:U:P:X" "ns:c:t:";
opt_complementary = "-2:w+:t::";
options = "w:U:P:X" "ns:c:t:i";
} else {
// FETCHMAIL
opt_after_connect = NULL;
@ -346,6 +347,29 @@ int sendgetmail_main(int argc ATTRIBUTE_UNUSED, char **argv)
// get the sender
opt_from = sane(*argv++);
// if no recipients _and_ no body files specified -> enter all-included mode
// i.e. scan stdin for To: and Subject: lines ...
// ... and then use the rest of stdin as message body
if (!opt_recipients && !*argv) {
// fetch recipients and (optionally) subject
char *s;
while ((s = xmalloc_reads(INITIAL_STDIN_FILENO, NULL, NULL)) != NULL) {
if (0 == strncmp("To: ", s, 4)) {
llist_add_to_end(&opt_recipients, s+4);
} else if (0 == strncmp("Subject: ", s, 9)) {
opt_subject = s+9;
opts |= OPTS_s;
} else {
char first = s[0];
free(s);
if (!first)
break; // empty line
}
}
// order to read body from stdin
*--argv = (char *)"-";
}
// introduce to server
// we should start with modern EHLO
if (250 != smtp_checkp("EHLO %s", opt_from, -1)) {