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candump: Follow Bash exit status when signaled

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Bash and many other shells use 128 + signum as the exit status when a
program get signal and exit.  Follow the common behavior so that we
know how the programs are killed.

Signed-off-by: Yasushi SHOJI <yashi@spacecubics.com>
This commit is contained in:
Yasushi SHOJI
2023-03-20 10:21:54 +09:00
parent cfe41963f3
commit 4ec42fa089
1 changed files with 5 additions and 0 deletions
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candump.c
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@@ -118,6 +118,7 @@ static const char extra_m_info[4][4] = { "- -", "B -", "- E", "B E" };
extern int optind, opterr, optopt; extern int optind, opterr, optopt;
static volatile int running = 1; static volatile int running = 1;
static volatile sig_atomic_t signal_num;
static void print_usage(void) static void print_usage(void)
{ {
@@ -169,6 +170,7 @@ static void print_usage(void)
static void sigterm(int signo) static void sigterm(int signo)
{ {
running = 0; running = 0;
signal_num = signo;
} }
static int idx2dindex(int ifidx, int socket) static int idx2dindex(int ifidx, int socket)
@@ -861,5 +863,8 @@ int main(int argc, char **argv)
if (log) if (log)
fclose(logfile); fclose(logfile);
if (signal_num)
return 128 + signal_num;
return 0; return 0;
} }