lbutils: simplify getprogname usage

the functions no longer return errors, so i don't
need to handle them.

furthermore, the handling in state.c is redundant,
so i've removed that too.

Signed-off-by: Leah Rowe <leah@libreboot.org>

util/libreboot-utils/include/common.h

@@ -301,8 +301,6 @@ struct xstate {
 	struct macaddr mac;
 	struct xfile f;
 
-	char *argv0;
-
 	size_t i; /* index to cmd[] for current command */
 	int no_cmd;
 

util/libreboot-utils/lib/state.c

@@ -77,9 +77,6 @@ xstart(int argc, char *argv[])
 	/* .f */
 	{0},
 
-	/* .argv0 (for our getprogname implementation) */
-	NULL,
-
 	/* ->i   (index to cmd[]) */
 	0,
 
@@ -103,7 +100,6 @@ xstart(int argc, char *argv[])
 
 	us.f.buf = us.f.real_buf;
 
-	us.argv0 = argv[0];
 	us.f.fname = argv[1];
 
 	us.f.tmp_fd = -1;

util/libreboot-utils/lib/string.c

@@ -324,17 +324,13 @@ err_exit(int nvm_errval, const char *msg, ...)
 	if (!errno)
 		saved_errno = errno = ECANCELED;
 
-	if ((p = lbgetprogname()) != NULL)
-		fprintf(stderr, "%s: ", p);
+	fprintf(stderr, "%s: ", lbgetprogname());
 
 	va_start(args, msg);
 	vfprintf(stderr, msg, args);
 	va_end(args);
 
-	if (p != NULL)
-		fprintf(stderr, ": %s\n", strerror(errno));
-	else
-		fprintf(stderr, "%s\n", strerror(errno));
+	fprintf(stderr, ": %s\n", strerror(errno));
 
 	exit(EXIT_FAILURE);
 }

util/libreboot-utils/lottery.c

@@ -21,8 +21,7 @@ main(int argc, char **argv)
 	(void) argc, (void) argv;
 
 	(void) errhook(exit_cleanup);
-	if (lbsetprogname(argv[0]) == NULL)
-		err_exit(errno, "could not set progname");
+	(void) lbsetprogname(argv[0]);
 
 	/* https://man.openbsd.org/pledge.2 */
 	xpledgex("stdio", NULL);

util/libreboot-utils/mkhtemp.c

@@ -62,8 +62,7 @@ main(int argc, char *argv[])
 	int type = MKHTEMP_FILE;
 
 	(void) errhook(exit_cleanup);
-	if (lbsetprogname(argv[0]) == NULL)
-		err_exit(errno, "could not set progname");
+	(void) lbsetprogname(argv[0]);
 
 	/* https://man.openbsd.org/pledge.2 */
 	xpledgex("stdio flock rpath wpath cpath", NULL);

util/libreboot-utils/nvmutil.c

@@ -33,8 +33,7 @@ main(int argc, char *argv[])
 	size_t c;
 
 	(void) errhook(exit_cleanup);
-	if (lbsetprogname(argv[0]) == NULL)
-		err_exit(errno, "could not set progname");
+	(void) lbsetprogname(argv[0]);
 
 	/* https://man.openbsd.org/pledge.2 */
 	/* https://man.openbsd.org/unveil.2 */