From e0383e3e88f4d80454bb67b4e8920126c667d258 Mon Sep 17 00:00:00 2001 From: Karel Zak Date: Fri, 2 Dec 2016 14:11:20 +0100 Subject: wall: check -g GID Based on comments from Sami Kerola. Signed-off-by: Karel Zak --- term-utils/wall.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'term-utils') diff --git a/term-utils/wall.c b/term-utils/wall.c index 7eee88c90..2c1697c3b 100644 --- a/term-utils/wall.c +++ b/term-utils/wall.c @@ -109,10 +109,16 @@ struct group_workspace { static gid_t get_group_gid(const char *optarg) { struct group *gr; + gid_t gid; if ((gr = getgrnam(optarg))) return gr->gr_gid; - return strtou64_or_err(optarg, _("invalid group argument")); + + gid = strtou32_or_err(optarg, _("invalid group argument")); + if (!getgrgid(gid)) + errx(EXIT_FAILURE, _("%s: unknown gid"), optarg); + + return gid; } static struct group_workspace *init_group_workspace(const char *optarg) -- cgit v1.2.3-55-g7522