在 14-9-23 上午11:25, Ruoyu 写道:
On 2014年09月23日 11:11, Meng An wrote:
From: Meng An <[email protected]>
In function do_generic_subcommand, we should check if argv[optind] is
NULL
before using it.
Thanks, but why we should check it first?
for example, if we run the command "dog node log level -a 127.0.0.1"
without setting the subcommand "set/get/list",
it will cause Segment Fault, because in funtion do_generic_subcommand,
we using argv[optind] directly:
***
248 for (i = 0; sub[i].name; i++) {
249 unsigned long flags;
250
251 if (strcmp(sub[i].name, argv[optind]))
252 continue;
253
***
Thanks,
Meng
Signed-off-by: Meng An <[email protected]>
---
dog/common.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/dog/common.c b/dog/common.c
index 3c4f6f5..df49792 100644
--- a/dog/common.c
+++ b/dog/common.c
@@ -238,6 +238,9 @@ int do_generic_subcommand(struct subcommand *sub,
int argc, char **argv)
sd_err("Too deep netsted subcommands, "
"please expand MAX_SUBCMD_DEPTH");
exit(EXIT_USAGE);
+ } else if (NULL == argv[optind]) {
+ subcommand_usage(argv[1], argv[2], EXIT_USAGE);
+ exit(EXIT_USAGE);
}
subcmd_stack[++subcmd_depth] = sub;
--
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