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| author | Jacopo Mondi <jacopo+renesas@jmondi.org> | 2017-09-28 15:01:44 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2017-10-07 00:03:14 +0200 |
| commit | d327a224ba2cbe234d82fd560ff8e5bb38b0bb4b (patch) | |
| tree | dbc2c02afc0944051f97c219c915c34f81768abe /tools/gpio | |
| parent | a3c1295280c8ac0823d0cac06f88a53928781a37 (diff) | |
| download | lwn-d327a224ba2cbe234d82fd560ff8e5bb38b0bb4b.tar.gz lwn-d327a224ba2cbe234d82fd560ff8e5bb38b0bb4b.zip | |
tools: gpio: Print error string on IOCTL failures
Add to error messages the error description by concatenating
output of strerror() function to error messages print out by
gpio-utils.c on IOCTL failures.
Rationalize error messages, while at there, making all of them
look the same.
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'tools/gpio')
| -rw-r--r-- | tools/gpio/gpio-utils.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/tools/gpio/gpio-utils.c b/tools/gpio/gpio-utils.c index b86a32d90d88..cf7e2f3419ee 100644 --- a/tools/gpio/gpio-utils.c +++ b/tools/gpio/gpio-utils.c @@ -76,7 +76,8 @@ int gpiotools_request_linehandle(const char *device_name, unsigned int *lines, fd = open(chrdev_name, 0); if (fd == -1) { ret = -errno; - fprintf(stderr, "Failed to open %s\n", chrdev_name); + fprintf(stderr, "Failed to open %s, %s\n", + chrdev_name, strerror(errno)); goto exit_close_error; } @@ -92,8 +93,8 @@ int gpiotools_request_linehandle(const char *device_name, unsigned int *lines, ret = ioctl(fd, GPIO_GET_LINEHANDLE_IOCTL, &req); if (ret == -1) { ret = -errno; - fprintf(stderr, "Failed to issue GET LINEHANDLE IOCTL (%d)\n", - ret); + fprintf(stderr, "Failed to issue %s (%d), %s\n", + "GPIO_GET_LINEHANDLE_IOCTL", ret, strerror(errno)); } exit_close_error: @@ -118,8 +119,9 @@ int gpiotools_set_values(const int fd, struct gpiohandle_data *data) ret = ioctl(fd, GPIOHANDLE_SET_LINE_VALUES_IOCTL, data); if (ret == -1) { ret = -errno; - fprintf(stderr, "Failed to issue %s (%d)\n", - "GPIOHANDLE_SET_LINE_VALUES_IOCTL", ret); + fprintf(stderr, "Failed to issue %s (%d), %s\n", + "GPIOHANDLE_SET_LINE_VALUES_IOCTL", ret, + strerror(errno)); } return ret; @@ -141,8 +143,9 @@ int gpiotools_get_values(const int fd, struct gpiohandle_data *data) ret = ioctl(fd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, data); if (ret == -1) { ret = -errno; - fprintf(stderr, "Failed to issue %s (%d)\n", - "GPIOHANDLE_GET_LINE_VALUES_IOCTL", ret); + fprintf(stderr, "Failed to issue %s (%d), %s\n", + "GPIOHANDLE_GET_LINE_VALUES_IOCTL", ret, + strerror(errno)); } return ret; |