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cryptsetup: add a terse help

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This commit is contained in:
Lennart Poettering 2011-02-25 02:56:27 +01:00
parent 446f004656
commit dd5e696d93
1 changed files with 16 additions and 0 deletions
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16
src/cryptsetup.c
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@ -207,6 +207,17 @@ finish:
return mp;
}
static int help(void) {
printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n"
"%s detach VOLUME\n\n"
"Attaches or detaches an encrypted block device.\n",
program_invocation_short_name,
program_invocation_short_name);
return 0;
}
int main(int argc, char *argv[]) {
int r = EXIT_FAILURE;
struct crypt_device *cd = NULL;
@ -214,6 +225,11 @@ int main(int argc, char *argv[]) {
const char *cipher = NULL, *cipher_mode = NULL, *hash = NULL, *name = NULL;
char *description = NULL, *name_buffer = NULL, *mount_point = NULL;
if (argc <= 1) {
help();
return EXIT_SUCCESS;
}
if (argc < 3) {
log_error("This program requires at least two arguments.");
return EXIT_FAILURE;