mirror of
git://git.sv.gnu.org/coreutils.git
synced 2026-06-13 21:16:39 +02:00
Jim Meyering
88 lines
2.4 KiB
Bash
Executable File
88 lines
2.4 KiB
Bash
Executable File
#!/bin/sh
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# nohup -- run a command immume to hangups, with output to a non-tty
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# Copyright (C) 1991, 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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# Written by David MacKenzie <djm@gnu.ai.mit.edu>.
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usage="Usage: $0 COMMAND [ARG]...
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or: $0 OPTION"
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usage_try="
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Try \`$0 --help' for more information."
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usage_help="Run COMMAND, ignoring hangup signals.
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--help display this help and exit
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--version output version information and exit
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Report bugs to <@PACKAGE_BUGREPORT@>."
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if [ $# -eq 0 ]; then
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echo >&2 "$usage"
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echo >&2 "$usage_try"
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exit 1
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fi
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fail=0
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case $# in
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1 )
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case "z${1}" in
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z--help )
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echo "$usage" || fail=1; echo "$usage_help" || fail=1; exit $fail;;
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z--version )
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echo "nohup (@GNU_PACKAGE@) @VERSION@" || fail=1; exit $fail;;
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* ) ;;
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esac
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;;
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* ) ;;
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esac
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# Make sure we get GNU nice, if possible; also allow
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# it to be somewhere else in PATH if not installed yet.
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# But do not modify PATH itself.
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IFS="${IFS= }"; save_ifs="$IFS"; IFS=":"
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nicepath="@bindir@:$PATH"
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niceprog="nice"
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for nicedir in $nicepath; do
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test -z "$nicedir" && nicedir="."
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if test -x "$nicedir/nice"; then
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niceprog="$nicedir/nice"
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break
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fi
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done
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IFS="$save_ifs"
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trap "" 1
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oldmask=`umask`; umask 077
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# Only redirect the output if the user didn't already do it.
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if [ -t 1 ]; then
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# If we cannot write to the current directory, use the home directory.
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if cat /dev/null >> nohup.out; then
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echo "nohup: appending output to \`nohup.out'" 2>&1
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umask $oldmask
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exec "$niceprog" -5 -- "$@" >> nohup.out 2>&1
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else
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cat /dev/null >> $HOME/nohup.out
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echo "nohup: appending output to \`$HOME/nohup.out'" 2>&1
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umask $oldmask
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exec "$niceprog" -5 -- "$@" >> $HOME/nohup.out 2>&1
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fi
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else
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umask $oldmask
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exec "$niceprog" -5 -- "$@"
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fi
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