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selftests: watchdog: fix message when /dev/watchdog open fails

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[ Upstream commit 9a244229a4 ]

When /dev/watchdog open fails, watchdog exits with "watchdog not enabled"
message. This is incorrect when open fails due to insufficient privilege.

Fix message to clearly state the reason when open fails with EACCESS when
a non-root user runs it.

Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Shuah Khan (Samsung OSG) 2018-09-26 13:07:11 -06:00 committed by Greg Kroah-Hartman
parent c033f4b76b
commit b8676497ea
1 changed files with 7 additions and 1 deletions
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8
tools/testing/selftests/watchdog/watchdog-test.c
View file

@ -89,7 +89,13 @@ int main(int argc, char *argv[])
fd = open("/dev/watchdog", O_WRONLY);
if (fd == -1) {
printf("Watchdog device not enabled.\n");
if (errno == ENOENT)
printf("Watchdog device not enabled.\n");
else if (errno == EACCES)
printf("Run watchdog as root.\n");
else
printf("Watchdog device open failed %s\n",
strerror(errno));
exit(-1);
}