[linux-pam] pam_xauth: log fatal errors preventing xauth process execution

[Dmitry V. Levin]

commit 91c66ca82063aaab5db9de0bf76f4456b2b11527
Author: Dmitry V. Levin <ldv(a)altlinux.org&gt;
Date:   Fri Jan 24 15:30:01 2014 +0000

    pam_xauth: log fatal errors preventing xauth process execution
    
    * modules/pam_xauth/pam_xauth.c (run_coprocess): Log errors from pipe()
    and fork() calls.

 modules/pam_xauth/pam_xauth.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/modules/pam_xauth/pam_xauth.c b/modules/pam_xauth/pam_xauth.c
index 88624b1..e1c0064 100644
--- a/modules/pam_xauth/pam_xauth.c
+++ b/modules/pam_xauth/pam_xauth.c
@@ -103,9 +103,11 @@ run_coprocess(pam_handle_t *pamh, const char *input, char **output,
 
 	/* Create stdio pipery. */
 	if (pipe(ipipe) == -1) {
+		pam_syslog(pamh, LOG_ERR, "Could not create pipe: %m");
 		return -1;
 	}
 	if (pipe(opipe) == -1) {
+		pam_syslog(pamh, LOG_ERR, "Could not create pipe: %m");
 		close(ipipe[0]);
 		close(ipipe[1]);
 		return -1;
@@ -114,6 +116,7 @@ run_coprocess(pam_handle_t *pamh, const char *input, char **output,
 	/* Fork off a child. */
 	child = fork();
 	if (child == -1) {
+		pam_syslog(pamh, LOG_ERR, "Could not fork: %m");
 		close(ipipe[0]);
 		close(ipipe[1]);
 		close(opipe[0]);