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Use getopt_long() to reject flags w/usage output

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XANTRONIX Development 2020-09-10 20:25:15 -04:00 • committed by XANTRONIX Industrial
parent bb118be462
commit cc530fcccc
1 changed files with 11 additions and 0 deletions
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11
bin/ax25dump.c
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@ -2,6 +2,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include <stdarg.h> #include <stdarg.h>
#include <getopt.h>
#include <unistd.h> #include <unistd.h>
#include <sys/types.h> #include <sys/types.h>
#include <sys/stat.h> #include <sys/stat.h>
@ -36,6 +37,10 @@ static void usage(int argc, char **argv, const char *message, ...) {
int main(int argc, char **argv) { int main(int argc, char **argv) {
patty_client *client; patty_client *client;
struct option opts[] = {
{ NULL, 0, NULL, 0 }
};
uint8_t buf[4096]; uint8_t buf[4096];
ssize_t readlen; ssize_t readlen;
@ -45,6 +50,12 @@ int main(int argc, char **argv) {
struct stat st; struct stat st;
int ch;
if ((ch = getopt_long(argc, argv, "", opts, NULL)) >= 0) {
usage(argc, argv, NULL);
}
if (argc < 2) { if (argc < 2) {
usage(argc, argv, "Not enough arguments provided"); usage(argc, argv, "Not enough arguments provided");
} }