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tools: bpftool: return from do_event_pipe() on bad arguments 

When command line parsing fails in the while loop in do_event_pipe()
because the number of arguments is incorrect or because the keyword is
unknown, an error message is displayed, but bpftool remains stuck in
the loop. Make sure we exit the loop upon failure.

Fixes: f412eed9df ("tools: bpftool: add simple perf event output reader")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Quentin Monnet 2018-08-23 17:46:25 +01:00 committed by Daniel Borkmann
parent c020347576
commit 785e76d7a2
1 changed files with 4 additions and 1 deletions
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5
tools/bpf/bpftool/map_perf_ring.c
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@ -194,8 +194,10 @@ int do_event_pipe(int argc, char **argv)
}
while (argc) {
if (argc < 2)
if (argc < 2) {
BAD_ARG();
goto err_close_map;
}
if (is_prefix(*argv, "cpu")) {
char *endptr;
@ -221,6 +223,7 @@ int do_event_pipe(int argc, char **argv)
NEXT_ARG();
} else {
BAD_ARG();
goto err_close_map;
}
do_all = false;