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cansniffer: 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 10:22:21 +09:00
parent 3caf692925
commit 3ef3d72738
1 changed files with 6 additions and 0 deletions
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cansniffer.c
+6
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@@ -124,6 +124,7 @@ extern int optind, opterr, optopt;
static int idx; static int idx;
static int running = 1; static int running = 1;
static volatile sig_atomic_t signal_num;
static int clearscreen = 1; static int clearscreen = 1;
static int print_eff; static int print_eff;
static int print_ascii = 1; static int print_ascii = 1;
@@ -243,6 +244,7 @@ void print_usage(char *prg)
void sigterm(int signo) void sigterm(int signo)
{ {
running = 0; running = 0;
signal_num = signo;
} }
int main(int argc, char **argv) int main(int argc, char **argv)
@@ -428,6 +430,10 @@ int main(int argc, char **argv)
printf("%s", CSR_SHOW); /* show cursor */ printf("%s", CSR_SHOW); /* show cursor */
close(s); close(s);
if (signal_num)
return 128 + signal_num;
return ret; return ret;
} }