diff options
Diffstat (limited to 'bin/ever.c')
-rw-r--r-- | bin/ever.c | 53 |
1 files changed, 37 insertions, 16 deletions
diff --git a/bin/ever.c b/bin/ever.c index 9fd48f96..24575617 100644 --- a/bin/ever.c +++ b/bin/ever.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2017 C. McEnroe <june@causal.agency> +/* Copyright (C) 2017 June McEnroe <june@causal.agency> * * 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 @@ -18,15 +18,15 @@ #include <err.h> #include <fcntl.h> +#include <stdbool.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) { +static int watch(int kq, char *path) { int fd = open(path, O_CLOEXEC); - if (fd < 0) err(EX_NOINPUT, "%s", path); + if (fd < 0) err(1, "%s", path); struct kevent event; EV_SET( @@ -39,22 +39,27 @@ static void watch(int kq, char *path) { path ); int nevents = kevent(kq, &event, 1, NULL, 0, NULL); - if (nevents < 0) err(EX_OSERR, "kevent"); + if (nevents < 0) err(1, "kevent"); + + return fd; } -static void exec(char *const argv[]) { +static bool quiet; +static void exec(int fd, char *const argv[]) { pid_t pid = fork(); - if (pid < 0) err(EX_OSERR, "fork"); + if (pid < 0) err(1, "fork"); if (!pid) { + dup2(fd, STDIN_FILENO); execvp(*argv, argv); - err(EX_NOINPUT, "%s", *argv); + err(127, "%s", *argv); } int status; pid = wait(&status); - if (pid < 0) err(EX_OSERR, "wait"); + if (pid < 0) err(1, "wait"); + if (quiet) return; if (WIFEXITED(status)) { warnx("exit %d\n", WEXITSTATUS(status)); } else if (WIFSIGNALED(status)) { @@ -65,13 +70,24 @@ static void exec(char *const argv[]) { } int main(int argc, char *argv[]) { - if (argc < 3) return EX_USAGE; + bool input = false; + + for (int opt; 0 < (opt = getopt(argc, argv, "iq"));) { + switch (opt) { + break; case 'i': input = true; + break; case 'q': quiet = true; + break; default: return 1; + } + } + argc -= optind; + argv += optind; + if (argc < 2) return 1; int kq = kqueue(); - if (kq < 0) err(EX_OSERR, "kqueue"); + if (kq < 0) err(1, "kqueue"); int i; - for (i = 1; i < argc - 1; ++i) { + for (i = 0; i < argc - 1; ++i) { if (argv[i][0] == '-') { i++; break; @@ -79,19 +95,24 @@ int main(int argc, char *argv[]) { watch(kq, argv[i]); } - exec(&argv[i]); + if (!input) { + exec(STDIN_FILENO, &argv[i]); + } for (;;) { struct kevent event; int nevents = kevent(kq, NULL, 0, &event, 1, NULL); - if (nevents < 0) err(EX_OSERR, "kevent"); + if (nevents < 0) err(1, "kevent"); if (event.fflags & NOTE_DELETE) { close(event.ident); sleep(1); - watch(kq, (char *)event.udata); + event.ident = watch(kq, (char *)event.udata); + } else if (input) { + off_t off = lseek(event.ident, 0, SEEK_SET); + if (off < 0) err(1, "lseek"); } - exec(&argv[i]); + exec((input ? event.ident : STDIN_FILENO), &argv[i]); } } |