/* * sysctl - sysctl set/get helpers * Subject to the GPL, version 2. */ #include #include #include #include #include #include #include "built_in.h" #include "sysctl.h" int sysctl_set_int(const char *file, int value) { char path[PATH_MAX]; char str[64]; ssize_t ret; int fd; strncpy(path, SYSCTL_PROC_PATH, PATH_MAX); strncat(path, file, PATH_MAX - sizeof(SYSCTL_PROC_PATH) - 1); fd = open(path, O_WRONLY); if (unlikely(fd < 0)) return -1; ret = snprintf(str, 63, "%d", value); if (ret < 0) { close(fd); return -1; } ret = write(fd, str, strlen(str)); close(fd); return ret <= 0 ? -1 : 0; } int sysctl_get_int(const char *file, int *value) { char path[PATH_MAX]; char str[64]; ssize_t ret; int fd; strncpy(path, SYSCTL_PROC_PATH, PATH_MAX); strncat(path, file, PATH_MAX - sizeof(SYSCTL_PROC_PATH) - 1); fd = open(path, O_RDONLY); if (fd < 0) return -1; ret = read(fd, str, sizeof(str)); if (ret > 0) { *value = atoi(str); ret = 0; } else { ret = -1; } close(fd); return ret; } anup net-next plumbingsTobias Klauser
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authorMarkus Elfring <elfring@users.sourceforge.net>2014-11-19 18:30:22 +0100
committerJiri Kosina <jkosina@suse.com>2015-06-29 14:51:12 +0200
commit4b8a8262086ece4b7eb34bd2e40cce3b3c9c7079 (patch)
treef7c6bd8249ca0daf1c9632e9a103e89f1787276f /drivers/hid
parent67db8a8086e9b865533348954f5547f1e433101e (diff)
HID: picoLCD: Deletion of unnecessary checks before three function calls
The functions backlight_device_unregister(), lcd_device_unregister() and rc_unregister_device() test whether their argument is NULL and then return immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Reviewed-by: Bruno Prémont <bonbons@linux-vserver.org> Signed-off-by: Jiri Kosina <jkosina@suse.com>
Diffstat (limited to 'drivers/hid')