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| author | Karel Zak | 2019-06-06 12:33:03 +0200 |
|---|---|---|
| committer | Karel Zak | 2019-06-06 12:33:03 +0200 |
| commit | 33985f1149598e9d5740cc6b851d979e3a8b84a5 (patch) | |
| tree | 920555f6b51d4b5e748eba6de0d497e2a1f37ace /term-utils | |
| parent | libblkid: fix detection of dm-integrity superblock version (diff) | |
| download | kernel-qcow2-util-linux-33985f1149598e9d5740cc6b851d979e3a8b84a5.tar.gz kernel-qcow2-util-linux-33985f1149598e9d5740cc6b851d979e3a8b84a5.tar.xz kernel-qcow2-util-linux-33985f1149598e9d5740cc6b851d979e3a8b84a5.zip | |
wall: make sure ut_line is not empty
Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1711574
Signed-off-by: Karel Zak <kzak@redhat.com>
Diffstat (limited to 'term-utils')
| -rw-r--r-- | term-utils/wall.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/term-utils/wall.c b/term-utils/wall.c index c606e6347..c3e89bab9 100644 --- a/term-utils/wall.c +++ b/term-utils/wall.c @@ -250,10 +250,12 @@ int main(int argc, char **argv) if (utmpptr->ut_type != USER_PROCESS) continue; #endif - /* Joey Hess reports that use-sessreg in /etc/X11/wdm/ - produces ut_line entries like :0, and a write - to /dev/:0 fails. */ - if (utmpptr->ut_line[0] == ':') + /* Joey Hess reports that use-sessreg in /etc/X11/wdm/ produces + * ut_line entries like :0, and a write to /dev/:0 fails. + * + * It also seems that some login manager may produce empty ut_line. + */ + if (!*utmpptr->ut_line || *utmpptr->ut_line == ':') continue; if (group_buf && !is_gr_member(utmpptr->ut_user, group_buf)) |