diff options
Diffstat (limited to 'usr.sbin/gpioctl/gpioctl.c')
| -rw-r--r-- | usr.sbin/gpioctl/gpioctl.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/usr.sbin/gpioctl/gpioctl.c b/usr.sbin/gpioctl/gpioctl.c index 9d76e1d..e4708a4 100644 --- a/usr.sbin/gpioctl/gpioctl.c +++ b/usr.sbin/gpioctl/gpioctl.c @@ -30,6 +30,7 @@ __FBSDID("$FreeBSD$"); #include <fcntl.h> #include <getopt.h> +#include <paths.h> #include <stdio.h> #include <stdarg.h> #include <stdlib.h> @@ -63,10 +64,10 @@ static void usage(void) { fprintf(stderr, "Usage:\n"); - fprintf(stderr, "\tgpioctl -f ctldev -l [-v]\n"); - fprintf(stderr, "\tgpioctl -f ctldev -t pin\n"); - fprintf(stderr, "\tgpioctl -f ctldev -c pin flag ...\n"); - fprintf(stderr, "\tgpioctl -f ctldev pin [0|1]\n"); + fprintf(stderr, "\tgpioctl [-f ctldev] -l [-v]\n"); + fprintf(stderr, "\tgpioctl [-f ctldev] -t pin\n"); + fprintf(stderr, "\tgpioctl [-f ctldev] -c pin flag ...\n"); + fprintf(stderr, "\tgpioctl [-f ctldev] pin [0|1]\n"); exit(1); } @@ -185,6 +186,7 @@ main(int argc, char **argv) int i; struct gpio_pin pin; struct gpio_req req; + char defctlfile[] = _PATH_DEVGPIOC "0"; char *ctlfile = NULL; int pinn, pinv, fd, ch; int flags, flag, ok; @@ -226,7 +228,7 @@ main(int argc, char **argv) printf("%d/%s\n", i, argv[i]); if (ctlfile == NULL) - fail("No gpioctl device provided\n"); + ctlfile = defctlfile; fd = open(ctlfile, O_RDONLY); if (fd < 0) { |
