diff options
Diffstat (limited to 'src/keyfuzz.c')
| -rw-r--r-- | src/keyfuzz.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/src/keyfuzz.c b/src/keyfuzz.c new file mode 100644 index 0000000..e2857ba --- /dev/null +++ b/src/keyfuzz.c @@ -0,0 +1,220 @@ +#include <stdio.h> +#include <errno.h> +#include <string.h> +#include <limits.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <linux/input.h> + +#include "cmdline.h" + +#define MAX_SCANCODES 1024 + +static struct gengetopt_args_info args; + +int evdev_open(const char *dev) { + int fd; + char fn[PATH_MAX]; + + if (!strchr(dev, '/')) { + snprintf(fn, sizeof(fn), "/dev/input/%s", dev); + dev = fn; + } + + if ((fd = open(dev, O_RDWR)) < 0) { + fprintf(stderr, "open('%s'): %s\n", dev, strerror(errno)); + return -1; + } + + return fd; +} + +int evdev_driver_version(int fd, char *v, size_t l) { + int version; + + if (ioctl(fd, EVIOCGVERSION, &version)) { + fprintf(stderr, "EVIOCGVERSION: %s\n", strerror(errno)); + return -1; + } + + snprintf(v, l, + "%i.%i.%i.", + version >> 16, + (version >> 8) & 0xff, + version & 0xff); + + return 0; +} + +int evdev_device_name(int fd, char *n, size_t l) { + + if (ioctl(fd, EVIOCGNAME(l), n) < 0) { + fprintf(stderr, "EVIOCGNAME: %s\n", strerror(errno)); + return -1; + } + + return 0; +} + +int evdev_get_keycode(int fd, int scancode, int e) { + int codes[2]; + + codes[0] = scancode; + if (ioctl(fd, EVIOCGKEYCODE, codes) < 0) { + if (e && errno == EINVAL) + return -2; + else { + fprintf(stderr, "EVIOCGKEYCODE: %s\n", strerror(errno)); + return -1; + } + } + + return codes[1]; +} + +int evdev_set_keycode(int fd, int scancode, int keycode) { + int codes[2]; + + codes[0] = scancode; + codes[1] = keycode; + + if (ioctl(fd, EVIOCSKEYCODE, codes) < 0) { + fprintf(stderr, "EVIOCSKEYCODE: %s\n", strerror(errno)); + return -1; + } + + return 0; +} + +int print_info(int fd) { + char version[256], name[256]; + int r = -1; + + if (evdev_driver_version(fd, version, sizeof(version)) < 0) + goto fail; + + if (evdev_device_name(fd, name, sizeof(name)) < 0) + goto fail; + + printf("evdev driver version %s\n" + "device name: %s\n", + version, name); + + r = 0; + +fail: + return r; +} + +int dump_table(int fd) { + char version[256], name[256]; + int scancode, r = -1; + + if (evdev_driver_version(fd, version, sizeof(version)) < 0) + goto fail; + + if (evdev_device_name(fd, name, sizeof(name)) < 0) + goto fail; + + printf("### evdev %s, driver '%s'\n", version, name); + + r = 0; + + for (scancode = 0; scancode < MAX_SCANCODES; scancode++) { + int keycode; + + if ((keycode = evdev_get_keycode(fd, scancode, 1)) < 0) { + if (keycode != -2) + r = -1; + + break; + } + + printf("0x%03x\t0x%03x\n", scancode, keycode); + } + + if (!r) + printf("### EOF\n"); + +fail: + return r; +} + +int merge_table(int fd) { + int r = -1; + int line = 0; + + while (!feof(stdin)) { + char s[256], *p; + int scancode, new_keycode, old_keycode; + + if (!fgets(s, sizeof(s), stdin)) + break; + + line++; + + p = s+strspn(s, "\t "); + + if (*p == '#' || *p == '\n') + continue; + + if (sscanf(p, "%i %i", &scancode, &new_keycode) != 2) { + fprintf(stderr, "Parse failure at line %i\n", line); + goto fail; + } + + if ((old_keycode = evdev_get_keycode(fd, scancode, 0)) < 0) + goto fail; + + if (evdev_set_keycode(fd, scancode, new_keycode) < 0) + goto fail; + + if (args.verbose_flag && new_keycode != old_keycode) + fprintf(stderr, "Remapped scancode 0x%02x to 0x%02x. (prior: 0x%02x)\n", scancode, new_keycode, old_keycode); + } + + r = 0; + +fail: + + return r; +} + +int main(int argc, char *argv[]) { + int fd = -1, r = 1; + + cmdline_parser(argc, argv, &args); + + if (!args.get_flag && !args.set_flag && !args.info_flag) { + cmdline_parser_print_help(); + goto fail; + } + + if ((fd = evdev_open(args.device_arg ? args.device_arg : "event0")) < 0) + goto fail; + + if (args.get_flag) { + + if (dump_table(fd) < 0) + goto fail; + + } else if (args.set_flag) { + + if (merge_table(fd) < 0) + goto fail; + + } else if (args.info_flag) { + + if (print_info(fd) < 0) + goto fail; + } + + r = 0; + +fail: + if (fd >= 0) + close(fd); + + return r; +} |