diff options
| -rwxr-xr-x | curtis/.bin/hnel.c | 98 | ||||
| -rwxr-xr-x | link.sh | 1 |
2 files changed, 99 insertions, 0 deletions
diff --git a/curtis/.bin/hnel.c b/curtis/.bin/hnel.c new file mode 100755 index 00000000..0e270a5c --- /dev/null +++ b/curtis/.bin/hnel.c @@ -0,0 +1,98 @@ +#if 0 +exec cc -Wall -Wextra -pedantic $@ -lutil -o $(dirname $0)/hnel $0 +#endif + +// Wrapper for preserving HJKL in Tarmak layouts. + +#include <err.h> +#include <poll.h> +#include <stdlib.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 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[]) { + if (argc < 2) return EX_USAGE; + + char table[256] = {0}; + table['n'] = 'j'; table['N'] = 'J'; table[CTRL('N')] = CTRL('J'); + table['e'] = 'k'; table['E'] = 'K'; table[CTRL('E')] = CTRL('K'); + table['j'] = 'e'; table['J'] = 'E'; table[CTRL('J')] = CTRL('E'); + table['k'] = 'n'; table['K'] = 'N'; table[CTRL('K')] = CTRL('N'); + + int master; + pid_t pid = forkpty(&master, NULL, NULL, NULL); + if (pid < 0) err(EX_OSERR, "forkpty"); + + if (!pid) { + execvp(argv[1], argv + 1); + err(EX_OSERR, "%s", argv[1]); + } + + int 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 pollfd fds[2] = { + { .fd = STDIN_FILENO, .events = POLLIN }, + { .fd = master, .events = POLLIN }, + }; + + char buf[4096]; + ssize_t len; + while (0 < poll(fds, 2, -1)) { + if (fds[0].revents) { + len = read(STDIN_FILENO, buf, sizeof(buf)); + if (len < 0) err(EX_IOERR, "read(%d)", STDIN_FILENO); + + if (len == 1) { + unsigned char c = buf[0]; + if (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"); +} diff --git a/link.sh b/link.sh index 2886d7c5..079d03dc 100755 --- a/link.sh +++ b/link.sh @@ -23,6 +23,7 @@ link() { link '.bin/bri.c' link '.bin/dtch.c' +link '.bin/hnel.c' link '.bin/jrp.c' link '.bin/pbd.c' link '.bin/xx.c' |