diff options
Diffstat (limited to 'extras')
| -rw-r--r-- | extras/keymap/keymap.c | 39 |
1 files changed, 23 insertions, 16 deletions
diff --git a/extras/keymap/keymap.c b/extras/keymap/keymap.c index 3f01d1953e..2d68e7f0c2 100644 --- a/extras/keymap/keymap.c +++ b/extras/keymap/keymap.c @@ -256,6 +256,24 @@ static const char* default_keymap_path(const char* path) return path; } +/* read one event; return 1 if valid */ +static int read_event(int fd, struct input_event* ev) +{ + int ret; + ret = read(fd, ev, sizeof(struct input_event)); + + if (ret < 0) { + perror("read"); + return 0; + } + if (ret != sizeof(struct input_event)) { + fprintf(stderr, "did not get enough data for event struct, aborting\n"); + return 0; + } + + return 1; +} + static void print_key(struct input_event *event) { static int cur_scancode = 0; @@ -280,28 +298,17 @@ static void print_key(struct input_event *event) static void interactive(int fd) { struct input_event ev; - int run = 1; /* grab input device */ ioctl(fd, EVIOCGRAB, 1); puts("Press ESC to finish"); - while (run) { - switch (read(fd, &ev, sizeof(ev))) { - case -1: - perror("read"); - run = 0; - break; - case 0: - run = 0; - break; - default: - print_key(&ev); - /* stop on Escape key release */ - if (ev.type == EV_KEY && ev.code == KEY_ESC && ev.value == 0) - run = 0; + while (read_event(fd, &ev)) { + print_key(&ev); + + /* stop on Escape key release */ + if (ev.type == EV_KEY && ev.code == KEY_ESC && ev.value == 0) break; - } } /* release input device */ |