diff options
| -rw-r--r-- | bin/ever.c | 33 | ||||
| -rw-r--r-- | bin/man1/ever.1 | 16 |
2 files changed, 41 insertions, 8 deletions
diff --git a/bin/ever.c b/bin/ever.c index da18c968..7838af4b 100644 --- a/bin/ever.c +++ b/bin/ever.c @@ -18,13 +18,14 @@ #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); @@ -40,13 +41,16 @@ static void watch(int kq, char *path) { ); int nevents = kevent(kq, &event, 1, NULL, 0, NULL); if (nevents < 0) err(EX_OSERR, "kevent"); + + return fd; } -static void exec(char *const argv[]) { +static void exec(int fd, char *const argv[]) { pid_t pid = fork(); if (pid < 0) err(EX_OSERR, "fork"); if (!pid) { + dup2(fd, STDIN_FILENO); execvp(*argv, argv); err(EX_NOINPUT, "%s", *argv); } @@ -65,13 +69,23 @@ 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, "i"));) { + switch (opt) { + break; case 'i': input = true; + break; default: return EX_USAGE; + } + } + argc -= optind; + argv += optind; + if (argc < 2) return EX_USAGE; int kq = kqueue(); if (kq < 0) err(EX_OSERR, "kqueue"); int i; - for (i = 1; i < argc - 1; ++i) { + for (i = 0; i < argc - 1; ++i) { if (argv[i][0] == '-') { i++; break; @@ -79,7 +93,9 @@ int main(int argc, char *argv[]) { watch(kq, argv[i]); } - exec(&argv[i]); + if (!input) { + exec(STDIN_FILENO, &argv[i]); + } for (;;) { struct kevent event; @@ -89,9 +105,12 @@ int main(int argc, char *argv[]) { 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(EX_IOERR, "lseek"); } - exec(&argv[i]); + exec((input ? event.ident : STDIN_FILENO), &argv[i]); } } diff --git a/bin/man1/ever.1 b/bin/man1/ever.1 index cde6d9b9..7689c5fb 100644 --- a/bin/man1/ever.1 +++ b/bin/man1/ever.1 @@ -1,4 +1,4 @@ -.Dd August 28, 2019 +.Dd June 1, 2020 .Dt EVER 1 .Os . @@ -8,9 +8,11 @@ . .Sh SYNOPSIS .Nm +.Op Fl i .Ar .Ar command .Nm +.Op Fl i .Ar .Fl - .Ar command @@ -24,9 +26,21 @@ whenever .Ar file is modified. . +.Pp +The arguments are as follows: +.Bl -tag -width Ds +.It Fl i +Attach the +.Ar file +which was modified +to the standard input of +.Ar command . +.El +. .Sh EXAMPLES .Dl ever ever.c make .Dl ever when.y ever.c -- make when ever +.Dl ever -i ever.1 mandoc . .Sh CAVEATS .Nm |