diff options
Diffstat (limited to 'curtis/.bin/watch.c')
-rwxr-xr-x | curtis/.bin/watch.c | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/curtis/.bin/watch.c b/curtis/.bin/watch.c deleted file mode 100755 index c13f6d71..00000000 --- a/curtis/.bin/watch.c +++ /dev/null @@ -1,100 +0,0 @@ -#if 0 -exec cc -Wall -Wextra -Wpedantic -o $(dirname $0)/watch $0 -#endif - -/* - * Execute a command each time files change. - * - * Copyright (c) 2017, Curtis McEnroe <programble@gmail.com> - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU Affero General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU Affero General Public License for more details. - * - * You should have received a copy of the GNU Affero General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <sys/types.h> - -#include <err.h> -#include <fcntl.h> -#include <stdlib.h> -#include <sys/event.h> -#include <sys/wait.h> -#include <sysexits.h> -#include <unistd.h> - -static void watch(int kq, char *path) { - int fd = open(path, O_RDONLY); - if (fd < 0) err(EX_IOERR, "%s", path); - - struct kevent event = { - .ident = fd, - .filter = EVFILT_VNODE, - .flags = EV_ADD | EV_CLEAR, - .fflags = NOTE_WRITE | NOTE_DELETE, - .udata = path, - }; - int nevents = kevent(kq, &event, 1, NULL, 0, NULL); - if (nevents < 0) err(EX_IOERR, "kevent"); -} - -static void exec(char *const argv[]) { - pid_t pid = fork(); - if (pid < 0) err(EX_OSERR, "fork"); - - if (!pid) { - execvp(argv[0], argv); - err(EX_OSERR, "%s", argv[0]); - } - - int status; - pid = wait(&status); - if (pid < 0) err(EX_OSERR, "wait"); - - if (WIFEXITED(status)) { - warnx("exit %d", WEXITSTATUS(status)); - } else if (WIFSIGNALED(status)) { - warnx("signal %d", WTERMSIG(status)); - } else { - warnx("status %d", status); - } -} - -int main(int argc, char *argv[]) { - if (argc < 3) return EX_USAGE; - - int kq = kqueue(); - if (kq < 0) err(EX_OSERR, "kqueue"); - - int index; - for (index = 1; index < argc - 1; ++index) { - if (argv[index][0] == '-') { - index++; - break; - } - watch(kq, argv[index]); - } - - exec(&argv[index]); - - for (;;) { - struct kevent event; - int nevents = kevent(kq, NULL, 0, &event, 1, NULL); - if (nevents < 0) err(EX_IOERR, "kevent"); - - if (event.fflags & NOTE_DELETE) { - close(event.ident); - watch(kq, event.udata); - } - - exec(&argv[index]); - } -} |