From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 23 Feb 2012 15:09:09 +0000 (-0500)
Subject: Fix: run_as error handling
X-Git-Tag: v2.0.0-rc3~35
X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=commitdiff_plain;h=def5e0e8ef5df8ccf3003b5afbd57561cf262a25

Fix: run_as error handling

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/src/common/runas.c b/src/common/runas.c
index 86db9b868..cdc9cb79e 100644
--- a/src/common/runas.c
+++ b/src/common/runas.c
@@ -217,6 +217,7 @@ int run_as(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
 	ret = pipe(retval_pipe);
 	if (ret < 0) {
 		perror("pipe");
+		retval.i = ret;
 		goto end;
 	}
 	run_as_data.data = data;
@@ -230,7 +231,7 @@ int run_as(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
 		-1, 0);
 	if (child_stack == MAP_FAILED) {
 		perror("mmap");
-		ret = -ENOMEM;
+		retval.i = -ENOMEM;
 		goto close_pipe;
 	}
 	/*
@@ -241,7 +242,7 @@ int run_as(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
 		&run_as_data);
 	if (pid < 0) {
 		perror("clone");
-		ret = pid;
+		retval.i = pid;
 		goto unmap_stack;
 	}
 	/* receive return value */
@@ -265,12 +266,13 @@ int run_as(int (*cmd)(void *data), void *data, uid_t uid, gid_t gid)
 	pid = waitpid(pid, &status, 0);
 	if (pid < 0 || !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
 		perror("wait");
-		ret = -1;
+		retval.i = -1;
 	}
 unmap_stack:
 	ret = munmap(child_stack, RUNAS_CHILD_STACK_SIZE);
 	if (ret < 0) {
 		perror("munmap");
+		retval.i = ret;
 	}
 close_pipe:
 	close(retval_pipe[0]);