From faf12794db27bf3ea86faf70c3467a21b2ac19d9 Mon Sep 17 00:00:00 2001 From: sin Date: Thu, 16 Oct 2014 11:40:57 +0100 Subject: [PATCH] We cannot use eprintf() without first initializing argv0 --- last.c | 18 +++++++++++------- 1 file changed, 11 insertions(+), 7 deletions(-) diff --git a/last.c b/last.c index 14fb386..5aeeb8f 100644 --- a/last.c +++ b/last.c @@ -12,11 +12,10 @@ #include "config.h" #include "util.h" -void +static void usage(void) { - fputs("last [user]\n", stderr); - exit(1); + eprintf("usage: %s [user]\n", argv0); } int @@ -27,18 +26,23 @@ main(int argc, char **argv) char *user, *file, *prog; time_t t; + ARGBEGIN { + default: + usage(); + } ARGEND; + switch (argc) { - case 1: + case 0: user = NULL; break; - case 2: - user = argv[1]; + case 1: + user = argv[0]; break; default: usage(); } - prog = basename(argv[0]); + prog = basename(argv0); file = (!strcmp(prog, "last")) ? WTMP_PATH : BTMP_PATH; if ((fp = fopen(file, "r")) == NULL) eprintf("fopen %s:", file);