From 4aca87515a5083ae0e31ce3177189fd43b6d05ac Mon Sep 17 00:00:00 2001 From: Andreas Baumann Date: Sat, 3 Jan 2015 13:58:15 +0100 Subject: patch to Vanilla Tomato 1.28 --- release/src/router/busybox/coreutils/nohup.c | 78 ++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 release/src/router/busybox/coreutils/nohup.c (limited to 'release/src/router/busybox/coreutils/nohup.c') diff --git a/release/src/router/busybox/coreutils/nohup.c b/release/src/router/busybox/coreutils/nohup.c new file mode 100644 index 00000000..f44e2af6 --- /dev/null +++ b/release/src/router/busybox/coreutils/nohup.c @@ -0,0 +1,78 @@ +/* vi: set sw=4 ts=4: */ +/* nohup - invoke a utility immune to hangups. + * + * Busybox version based on nohup specification at + * http://www.opengroup.org/onlinepubs/007904975/utilities/nohup.html + * + * Copyright 2006 Rob Landley + * Copyright 2006 Bernhard Reutner-Fischer + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "libbb.h" + +/* Compat info: nohup (GNU coreutils 6.8) does this: +# nohup true +nohup: ignoring input and appending output to `nohup.out' +# nohup true 1>/dev/null +nohup: ignoring input and redirecting stderr to stdout +# nohup true 2>zz +# cat zz +nohup: ignoring input and appending output to `nohup.out' +# nohup true 2>zz 1>/dev/null +# cat zz +nohup: ignoring input +# nohup true /dev/null +nohup: redirecting stderr to stdout +# nohup true zz 1>/dev/null +# cat zz + (nothing) +# +*/ + +int nohup_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int nohup_main(int argc, char **argv) +{ + const char *nohupout; + char *home; + + xfunc_error_retval = 127; + + if (argc < 2) bb_show_usage(); + + /* If stdin is a tty, detach from it. */ + if (isatty(STDIN_FILENO)) { + /* bb_error_msg("ignoring input"); */ + close(STDIN_FILENO); + xopen(bb_dev_null, O_RDONLY); /* will be fd 0 (STDIN_FILENO) */ + } + + nohupout = "nohup.out"; + /* Redirect stdout to nohup.out, either in "." or in "$HOME". */ + if (isatty(STDOUT_FILENO)) { + close(STDOUT_FILENO); + if (open(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR) < 0) { + home = getenv("HOME"); + if (home) { + nohupout = concat_path_file(home, nohupout); + xopen3(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR); + } else { + xopen(bb_dev_null, O_RDONLY); /* will be fd 1 */ + } + } + bb_error_msg("appending output to %s", nohupout); + } + + /* If we have a tty on stderr, redirect to stdout. */ + if (isatty(STDERR_FILENO)) { + /* if (stdout_wasnt_a_tty) + bb_error_msg("redirecting stderr to stdout"); */ + dup2(STDOUT_FILENO, STDERR_FILENO); + } + + signal(SIGHUP, SIG_IGN); + + BB_EXECVP(argv[1], argv+1); + bb_simple_perror_msg_and_die(argv[1]); +} -- cgit v1.2.3-54-g00ecf