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gpio: replace null with newline term in writes for sysfs implementation

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This commit is contained in:
Vanya A. Sergeev
2020-01-07 00:34:48 -06:00
parent c230b2087c
commit 396e2fdf64
1 changed files with 7 additions and 7 deletions
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src/gpio.c
+7 -7
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@@ -210,7 +210,7 @@ static const char *gpio_sysfs_edge_to_string[] = {
static int gpio_sysfs_close(gpio_t *gpio) {
char buf[16];
int fd;
int len, fd;
if (gpio->line_fd < 0)
return 0;
@@ -222,10 +222,10 @@ static int gpio_sysfs_close(gpio_t *gpio) {
gpio->line_fd = -1;
/* Unexport the GPIO */
snprintf(buf, sizeof(buf), "%u", gpio->line);
len = snprintf(buf, sizeof(buf), "%u\n", gpio->line);
if ((fd = open("/sys/class/gpio/unexport", O_WRONLY)) < 0)
return _gpio_error(gpio, GPIO_ERROR_CLOSE, errno, "Closing GPIO: opening 'unexport'");
if (write(fd, buf, strlen(buf)+1) < 0) {
if (write(fd, buf, len) < 0) {
int errsv = errno;
close(fd);
return _gpio_error(gpio, GPIO_ERROR_CLOSE, errsv, "Closing GPIO: writing 'unexport'");
@@ -258,7 +258,7 @@ static int gpio_sysfs_read(gpio_t *gpio, bool *value) {
}
static int gpio_sysfs_write(gpio_t *gpio, bool value) {
char value_str[][2] = {"0", "1"};
char value_str[][2] = {"0\n", "1\n"};
/* Write fd */
if (write(gpio->line_fd, value_str[value], 2) < 0)
@@ -534,7 +534,7 @@ int gpio_open_sysfs(gpio_t *gpio, unsigned int line, gpio_direction_t direction)
char gpio_path[P_PATH_MAX];
struct stat stat_buf;
char buf[16];
int ret, fd;
int len, fd, ret;
if (direction != GPIO_DIR_IN && direction != GPIO_DIR_OUT && direction != GPIO_DIR_OUT_LOW && direction != GPIO_DIR_OUT_HIGH)
return _gpio_error(gpio, GPIO_ERROR_ARG, 0, "Invalid GPIO direction (can be in, out, low, high)");
@@ -543,10 +543,10 @@ int gpio_open_sysfs(gpio_t *gpio, unsigned int line, gpio_direction_t direction)
snprintf(gpio_path, sizeof(gpio_path), "/sys/class/gpio/gpio%u", line);
if (stat(gpio_path, &stat_buf) < 0) {
/* Write line number to export file */
snprintf(buf, sizeof(buf), "%u", line);
len = snprintf(buf, sizeof(buf), "%u\n", line);
if ((fd = open("/sys/class/gpio/export", O_WRONLY)) < 0)
return _gpio_error(gpio, GPIO_ERROR_OPEN, errno, "Opening GPIO: opening 'export'");
if (write(fd, buf, strlen(buf)+1) < 0) {
if (write(fd, buf, len) < 0) {
int errsv = errno;
close(fd);
return _gpio_error(gpio, GPIO_ERROR_OPEN, errsv, "Opening GPIO: writing 'export'");