diff options
Diffstat (limited to 'home/.bin/hnel.c')
-rwxr-xr-x | home/.bin/hnel.c | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/home/.bin/hnel.c b/home/.bin/hnel.c deleted file mode 100755 index 3aec85b3..00000000 --- a/home/.bin/hnel.c +++ /dev/null @@ -1,115 +0,0 @@ -#if 0 -exec cc -Wall -Wextra -pedantic $@ -lutil -o $(dirname $0)/hnel $0 -#endif - -// PTY wrapper for preserving HJKL in Tarmak layouts. - -#include <err.h> -#include <poll.h> -#include <stdbool.h> -#include <stdlib.h> -#include <sys/ioctl.h> -#include <sys/wait.h> -#include <sysexits.h> -#include <termios.h> -#include <unistd.h> - -#if defined __FreeBSD__ -#include <libutil.h> -#elif defined __linux__ -#include <pty.h> -#else -#include <util.h> -#endif - -static char table[256] = { - ['n'] = 'j', ['N'] = 'J', [CTRL('N')] = CTRL('J'), - ['e'] = 'k', ['E'] = 'K', [CTRL('E')] = CTRL('K'), - ['j'] = 'e', ['J'] = 'E', [CTRL('J')] = CTRL('E'), - ['k'] = 'n', ['K'] = 'N', [CTRL('K')] = CTRL('N'), -}; - -static ssize_t writeAll(int fd, const char *buf, size_t len) { - ssize_t writeLen; - while (0 < (writeLen = write(fd, buf, len))) { - buf += writeLen; - len -= writeLen; - } - return writeLen; -} - -static struct termios saveTerm; - -static void restoreTerm(void) { - tcsetattr(STDERR_FILENO, TCSADRAIN, &saveTerm); -} - -int main(int argc, char *argv[]) { - int error; - - if (argc < 2) return EX_USAGE; - - error = tcgetattr(STDERR_FILENO, &saveTerm); - if (error) err(EX_IOERR, "tcgetattr"); - atexit(restoreTerm); - - struct termios raw; - cfmakeraw(&raw); - error = tcsetattr(STDERR_FILENO, TCSADRAIN, &raw); - if (error) err(EX_IOERR, "tcsetattr"); - - struct winsize window; - error = ioctl(STDERR_FILENO, TIOCGWINSZ, &window); - if (error) err(EX_IOERR, "ioctl(%d, TIOCGWINSZ)", STDERR_FILENO); - - int master; - pid_t pid = forkpty(&master, NULL, NULL, &window); - if (pid < 0) err(EX_OSERR, "forkpty"); - - if (!pid) { - execvp(argv[1], argv + 1); - err(EX_OSERR, "%s", argv[1]); - } - - bool enable = true; - - struct pollfd fds[2] = { - { .fd = STDIN_FILENO, .events = POLLIN }, - { .fd = master, .events = POLLIN }, - }; - while (0 < poll(fds, 2, -1)) { - char buf[4096]; - ssize_t len; - - if (fds[0].revents) { - len = read(STDIN_FILENO, buf, sizeof(buf)); - if (len < 0) err(EX_IOERR, "read(%d)", STDIN_FILENO); - - if (len == 1) { - if (buf[0] == CTRL('S')) { - enable = !enable; - continue; - } - - unsigned char c = buf[0]; - if (enable && table[c]) buf[0] = table[c]; - } - - len = writeAll(master, buf, len); - if (len < 0) err(EX_IOERR, "write(%d)", master); - } - - if (fds[1].revents) { - len = read(master, buf, sizeof(buf)); - if (len < 0) err(EX_IOERR, "read(%d)", master); - len = writeAll(STDOUT_FILENO, buf, len); - if (len < 0) err(EX_IOERR, "write(%d)", STDOUT_FILENO); - } - - int status; - pid_t dead = waitpid(pid, &status, WNOHANG); - if (dead < 0) err(EX_OSERR, "waitpid(%d)", pid); - if (dead) return WIFEXITED(status) ? WEXITSTATUS(status) : EX_SOFTWARE; - } - err(EX_IOERR, "poll"); -} |