diff options
| -rw-r--r-- | canecho.c | 41 |
1 files changed, 33 insertions, 8 deletions
@@ -4,6 +4,7 @@ #include <string.h> #include <signal.h> #include <libgen.h> +#include <getopt.h> #include <sys/types.h> #include <sys/socket.h> @@ -12,19 +13,28 @@ #include <net/if.h> #include <socket-can/can.h> +#include <can_config.h> extern int optind, opterr, optopt; static int s = -1; static int running = 1; +enum +{ + VERSION_OPTION = CHAR_MAX + 1, +}; + void print_usage(char *prg) { - fprintf(stderr, "Usage: %s [can-interface] [Options]\n", prg); - fprintf(stderr, "Options: -f <family> (default PF_CAN = %d)\n", PF_CAN); - fprintf(stderr, " -t <type> (default SOCK_RAW = %d)\n", SOCK_RAW); - fprintf(stderr, " -p <proto> (default CAN_PROTO_RAW = %d)\n", CAN_PROTO_RAW); - fprintf(stderr, " -v (verbose)\n"); + fprintf(stderr, "Usage: %s <can-interface> [Options]\n" + "Options:\n" + " -f, --family=FAMILY Protocol family (default PF_CAN = %d)\n" + " -t, --type=TYPE Socket type, see man 2 socket (default SOCK_RAW = %d)\n" + " -p, --protocol=PROTO CAN protocol (default CAN_PROTO_RAW = %d)\n" + " -v, --verbose be verbose\n" + " --version print version information and exit\n", + prg, PF_CAN, SOCK_RAW, CAN_PROTO_RAW); } void sigterm(int signo) @@ -46,7 +56,17 @@ int main(int argc, char **argv) signal(SIGTERM, sigterm); signal(SIGHUP, sigterm); - while ((opt = getopt(argc, argv, "f:t:p:v")) != -1) { + struct option long_options[] = { + { "help", no_argument, 0, 'h' }, + { "family", required_argument, 0, 'f' }, + { "protocol", required_argument, 0, 'p' }, + { "type", required_argument, 0, 't' }, + { "version", no_argument, 0, VERSION_OPTION}, + { "verbose", no_argument, 0, 'v'}, + { 0, 0, 0, 0}, + }; + + while ((opt = getopt_long(argc, argv, "hf:t:p:v", long_options, NULL)) != -1) { switch (opt) { case 'f': family = atoi(optarg); @@ -64,8 +84,13 @@ int main(int argc, char **argv) verbose = 1; break; - case '?': - break; + case 'h': + print_usage(basename(argv[0])); + exit(0); + + case VERSION_OPTION: + printf("canecho %s\n",VERSION); + exit(0); default: fprintf(stderr, "Unknown option %c\n", opt); |