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iodine: consolidate help() and usage()

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This avoids redundancies.

Signed-off-by: Ralf Ramsauer <ralf@ramses-pyramidenbau.de>
This commit is contained in:
Ralf Ramsauer 2017-03-11 01:34:46 -08:00
parent 1c86bf347f
commit 2efa4dfb35
1 changed files with 14 additions and 13 deletions
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27
src/iodine.c
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@ -15,6 +15,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/ */
#include <stdbool.h>
#include <stdio.h> #include <stdio.h>
#include <stdint.h> #include <stdint.h>
#include <stdlib.h> #include <stdlib.h>
@ -61,27 +62,22 @@ sighandler(int sig)
#if defined(__GNUC__) || defined(__clang__) #if defined(__GNUC__) || defined(__clang__)
/* mark as no return to help some compilers to avoid warnings /* mark as no return to help some compilers to avoid warnings
* about use of uninitialized variables */ * about use of uninitialized variables */
static void usage() __attribute__((noreturn)); static inline void usage(void) __attribute__((noreturn));
static inline void help(bool verbose) __attribute__((noreturn));
#endif #endif
static void static void
usage() { help(bool verbose) {
extern char *__progname;
fprintf(stderr, "Usage: %s [-v] [-h] [-f] [-r] [-u user] [-t chrootdir] [-d device] "
"[-P password] [-m maxfragsize] [-M maxlen] [-T type] [-O enc] [-L 0|1] [-I sec] "
"[-z context] [-F pidfile] [nameserver] topdomain\n", __progname);
exit(2);
}
static void
help() {
extern char *__progname; extern char *__progname;
fprintf(stderr, "iodine IP over DNS tunneling client\n"); fprintf(stderr, "iodine IP over DNS tunneling client\n");
fprintf(stderr, "Usage: %s [-v] [-h] [-f] [-r] [-u user] [-t chrootdir] [-d device] " fprintf(stderr, "Usage: %s [-v] [-h] [-f] [-r] [-u user] [-t chrootdir] [-d device] "
"[-P password] [-m maxfragsize] [-M maxlen] [-T type] [-O enc] [-L 0|1] [-I sec] " "[-P password] [-m maxfragsize] [-M maxlen] [-T type] [-O enc] [-L 0|1] [-I sec] "
"[-z context] [-F pidfile] [nameserver] topdomain\n", __progname); "[-z context] [-F pidfile] [nameserver] topdomain\n", __progname);
if (!verbose)
exit(2);
fprintf(stderr, "Options to try if connection doesn't work:\n"); fprintf(stderr, "Options to try if connection doesn't work:\n");
fprintf(stderr, " -T force dns type: NULL, PRIVATE, TXT, SRV, MX, CNAME, A (default: autodetect)\n"); fprintf(stderr, " -T force dns type: NULL, PRIVATE, TXT, SRV, MX, CNAME, A (default: autodetect)\n");
fprintf(stderr, " -O force downstream encoding for -T other than NULL: Base32, Base64, Base64u,\n"); fprintf(stderr, " -O force downstream encoding for -T other than NULL: Base32, Base64, Base64u,\n");
@ -107,6 +103,11 @@ help() {
exit(0); exit(0);
} }
static inline void usage(void)
{
help(false);
}
static void static void
version() { version() {
@ -204,7 +205,7 @@ main(int argc, char **argv)
foreground = 1; foreground = 1;
break; break;
case 'h': case 'h':
help(); help(true);
/* NOTREACHED */ /* NOTREACHED */
break; break;
case 'r': case 'r':