From 686b7cb4e5894d56f6e23b8aeab9af610c90eeed Mon Sep 17 00:00:00 2001
From: Colin Patrick McCabe <cmccabe@alumni.cmu.edu>
Date: Fri, 13 May 2011 12:04:23 -0700
Subject: [PATCH] Implement send_mail
Signed-off-by: Colin McCabe <colin.mccabe@dreamhost.com>
---
handle_core.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 65 insertions(+), 7 deletions(-)
diff --git a/handle_core.c b/handle_core.c
index 93d03cc..ce81772 100644
--- a/handle_core.c
+++ b/handle_core.c
@@ -1,10 +1,11 @@
#include <ctype.h>
-#include <errno.h>
#include <dirent.h>
+#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <glob.h>
#include <limits.h>
+#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -21,8 +22,9 @@
* Core file handler
*
* Example usage:
- * echo "|/usr/bin/handle_core -e %e -d /home/core -m 10" > \
- * /proc/sys/kernel/core_pattern
+ * echo "|/sbin/handle_core -e %e -d /var/core -m 10 \
+ * -s '/usr/sbin/sendmail -t sysadmin@example.com'" > \
+ * /proc/sys/kernel/core_pattern
*/
/* Count the number of core files we have. */
@@ -92,17 +94,20 @@ static void usage(void)
-h This help message\n\
-m <max_cores> This maximum number of core files to allow\n\
before deleting older core files.\n\
+-s <email_command> Send email using email_command.\n\
+ Example: -s '/usr/sbin/sendmail -t sysadmin@example.com'\n\
");
}
static int parse_options(int argc, char **argv, int *max_cores,
- char **exe_name, char **core_dir)
+ char **exe_name, char **core_dir, char **email)
{
int c;
*max_cores = 10;
*exe_name = NULL;
*core_dir = "/var/core";
- while ((c = getopt(argc, argv, "d:e:hm:")) != -1) {
+ *email = NULL;
+ while ((c = getopt(argc, argv, "d:e:hm:s:")) != -1) {
switch (c) {
case 'd':
*core_dir = optarg;
@@ -123,6 +128,9 @@ static int parse_options(int argc, char **argv, int *max_cores,
return 1;
}
break;
+ case 's':
+ *email = optarg;
+ break;
default:
fprintf(stderr, "handle_core: invalid usage\n\n");
return 1;
@@ -137,17 +145,61 @@ static int parse_options(int argc, char **argv, int *max_cores,
return 0;
}
+int send_mail(const char *exe_name, const char *core_dir,
+ const char *core_name, const char *email)
+{
+ char hostname[255];
+ struct hostent *fqdn;
+ const char *fqdn_name;
+ FILE *fp;
+
+ if (!email)
+ return 0;
+ fp = popen(email, "w");
+ if (!fp) {
+ int err = errno;
+ syslog(LOG_USER | LOG_ERR, "popen(%s) error: %d (%s)",
+ email, err, strerror(err));
+ return err;
+ }
+ if (gethostname(hostname, sizeof(hostname))) {
+ int err = errno;
+ syslog(LOG_USER | LOG_ERR, "gethostname error: %d (%s)",
+ err, strerror(err));
+ snprintf(hostname, sizeof(hostname), "(unknown-host)");
+ }
+ fqdn = gethostbyname(hostname);
+ if (!fqdn) {
+ int err = h_errno;
+ syslog(LOG_USER | LOG_ERR, "gethostbyname(%s) error: %d",
+ hostname, err);
+ fqdn_name = hostname;
+ }
+ else {
+ fqdn_name = fqdn->h_name;
+ }
+ fprintf(fp, "\
+Subject: [core_dump] %s crashed on %s\r\n\r\n\
+!!!!! Crash encountered on %s !!!!!!!!!\r\n\
+executable name: %s\r\n\
+core file name: %s/%s\r\n\
+", exe_name, hostname, fqdn_name, exe_name, core_dir, core_name);
+ fclose(fp);
+ return 0;
+}
+
int main(int argc, char **argv)
{
int ret, done = 0;
- char *exe_name, *core_dir;
+ char *exe_name, *core_dir, *email;
char core_name[PATH_MAX];
FILE *fp;
int num_coref, num_deleted;
int max_cores;
/* Write the core to a file */
- ret = parse_options(argc, argv, &max_cores, &exe_name, &core_dir);
+ ret = parse_options(argc, argv, &max_cores, &exe_name, &core_dir,
+ &email);
if (ret) {
syslog(LOG_USER | LOG_ERR, "parse_options error\n");
return 1;
@@ -205,6 +257,12 @@ int main(int argc, char **argv)
num_deleted++;
}
+ ret = send_mail(exe_name, core_dir, core_name, email);
+ if (ret) {
+ syslog(LOG_USER | LOG_ERR, "send_mail failed with error "
+ "code %d\n", ret);
+ }
+
syslog(LOG_USER | LOG_ERR, "wrote core %s. Deleted %d extra core%s\n",
core_name, num_deleted, ((num_deleted == 1) ? "" : "s"));
return 0;
--
1.6.6.rc1.39.g9a42