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From ae227f0eb3500b49fb78623f51ec9bd4366346ef Mon Sep 17 00:00:00 2001
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From: Stanislav Brabec <sbrabec@suse.cz>
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Date: Thu, 10 Oct 2019 01:08:25 +0200
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Subject: [PATCH 59/63] nologin: Prevent error from su -c
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"su -c" can pass "-c" to nologin. It causes ugly error:
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su -c "echo OK" - man
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-nologin: invalid option -- 'c'
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Try '-nologin --help' for more information.
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Accept -c to prevent this error.
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Upstream: http://github.com/karelzak/util-linux/commit/a174eefb41a2ce8b467bb7e1546953c8bd1223dd
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Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1922299
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Signed-off-by: Josef Cejka <jcejka@suse.com>
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Signed-off-by: Stanislav Brabec <sbrabec@suse.cz>
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---
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login-utils/nologin.8 | 11 +++++++++--
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login-utils/nologin.c | 9 +++++++--
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2 files changed, 16 insertions(+), 4 deletions(-)
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diff --git a/login-utils/nologin.8 b/login-utils/nologin.8
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index ee5948443..9389a86c6 100644
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--- a/login-utils/nologin.8
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+++ b/login-utils/nologin.8
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@@ -18,9 +18,16 @@ The exit code returned by
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is always 1.
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.PP
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.SH OPTIONS
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-.IP "\fB\-h, \-\-help\fP"
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+
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+
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+.TP
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+.IP "\fB\-c\fR, \fB\-\-command\fR \fIcommand\fR"
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+Ignored. For compatibility with
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+.I su -c "command" - user
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+that would cause error otherwise.
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+.IP "\fB\-h\fR, \fB\-\-help\fR"
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Display help text and exit.
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-.IP "\fB-V, \-\-version"
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+.IP "\fB-V\fR, \fB\-\-version\fR"
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Display version information and exit.
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.SH NOTES
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.B nologin
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diff --git a/login-utils/nologin.c b/login-utils/nologin.c
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index b0b6a721c..293f568c1 100644
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--- a/login-utils/nologin.c
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+++ b/login-utils/nologin.c
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@@ -30,7 +30,8 @@ static void __attribute__((__noreturn__)) usage(void)
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fputs(_("Politely refuse a login.\n"), out);
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fputs(USAGE_OPTIONS, out);
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- printf(USAGE_HELP_OPTIONS(16));
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+ fputs(_(" -c, --command <command> does nothing (for compatibility with su -c)\n"), out);
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+ printf(USAGE_HELP_OPTIONS(26));
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printf(USAGE_MAN_TAIL("nologin(8)"));
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exit(EXIT_FAILURE);
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@@ -41,6 +42,7 @@ int main(int argc, char *argv[])
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int c, fd = -1;
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struct stat st;
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static const struct option longopts[] = {
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+ { "command", required_argument, NULL, 'c' },
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{ "help", 0, NULL, 'h' },
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{ "version", 0, NULL, 'V' },
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{ NULL, 0, NULL, 0 }
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@@ -50,8 +52,11 @@ int main(int argc, char *argv[])
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bindtextdomain(PACKAGE, LOCALEDIR);
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textdomain(PACKAGE);
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- while ((c = getopt_long(argc, argv, "hV", longopts, NULL)) != -1) {
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+ while ((c = getopt_long(argc, argv, "c:hV", longopts, NULL)) != -1) {
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switch (c) {
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+ case 'c':
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+ /* Ignore the command, just don't print unknown option error. */
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+ break;
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case 'h':
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usage();
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break;
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--
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2.31.1
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