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1c59bb3cef
These programs can print non-fatal diagnostics to stderr prior to exec'ing a subsidiary program. However, if we thought the situation warranted a diagnostic, we insist that the diagnostic be printed without error, rather than blindly exec, as it may be a security risk. For an example, try 'nice -n -1 nice 2>/dev/full'. Failure to raise priority (by lowering niceness) is not fatal, but failure to inform the user about failure to change priority is dangerous. * src/nice.c (main): Declare failure if writing advisory message to stderr fails. * src/nohup.c (main): Likewise. * src/su.c (main): Likewise. * tests/misc/nice: Test this. * tests/misc/nohup: Likewise. * NEWS: Document this.
127 lines
3.3 KiB
Bash
Executable File
127 lines
3.3 KiB
Bash
Executable File
#!/bin/sh
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# test nohup
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# Copyright (C) 2003, 2006-2009 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 3 of the License, or
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# (at your option) 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, see <http://www.gnu.org/licenses/>.
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if test "$VERBOSE" = yes; then
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set -x
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nohup --version
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fi
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. $srcdir/test-lib.sh
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fail=0
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nohup sh -c 'echo stdout; echo stderr 1>&2' 2>err || fail=1
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# Be careful. The results of the above nohup command
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# change depending on whether stdin and stdout are redirected.
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if test -t 1; then
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test "`cat nohup.out`" = stdout || fail=1
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if test -t 0; then
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echo 'nohup: ignoring input and appending output to `nohup.out'\'
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else
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echo 'nohup: appending output to `nohup.out'\'
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fi >exp || fail=1
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else
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# Here it should not even exist.
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test -f nohup.out && fail=1
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if test -t 0; then
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echo 'nohup: ignoring input' >exp
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else
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rm -f exp
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fi || fail=1
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fi
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echo 'stderr' >> exp || fail=1
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compare exp err || fail=1
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rm -f nohup.out err exp
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# ----------------------
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# Be careful. The results of the following nohup command
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# change depending on whether stderr is redirected.
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nohup sh -c 'echo stdout; echo stderr 1>&2' >out || fail=1
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if test -t 2; then
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test "`cat out|tr '\n' -`" = stdout-stderr- || fail=1
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else
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test "`cat out|tr '\n' -`" = stdout- || fail=1
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fi
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# It must *not* exist.
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test -f nohup.out && fail=1
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rm -f nohup.out err
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# ----------------------
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# Bug present through coreutils 8.0: failure to print advisory message
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# to stderr must be fatal. Requires stdout to be terminal.
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if test -w /dev/full && test -c /dev/full; then
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(
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exec >/dev/tty
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test -t 1 || exit 0
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nohup echo hi 2> /dev/full
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test $? = 125 || fail=1
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test -f nohup.out || fail=1
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test -s nohup.out && fail=1
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rm -f nohup.out
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exit $fail
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) || fail=1
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fi
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nohup no-such-command 2> err
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errno=$?
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if test -t 1; then
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test $errno = 127 || fail=1
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# It must exist.
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test -f nohup.out || fail=1
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# It must be empty.
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test -s nohup.out && fail=1
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fi
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cat <<\EOF > exp || fail=1
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nohup: appending output to `nohup.out'
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nohup: cannot run command `no-such-command': No such file or directory
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EOF
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# Disable these comparisons. Too much variation in 2nd line.
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# compare exp err || fail=1
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rm -f nohup.out err exp
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# ----------------------
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touch k; chmod 0 k
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nohup ./k 2> err
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errno=$?
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test $errno = 126 || fail=1
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if test -t 1; then
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# It must exist.
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test -f nohup.out || fail=1
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# It must be empty.
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test -s nohup.out && fail=1
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fi
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cat <<\EOF > exp || fail=1
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nohup: appending output to `nohup.out'
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nohup: cannot run command `./k': Permission denied
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EOF
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# Disable these comparisons. Too much variation in 2nd line.
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# compare exp err || fail=1
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# Make sure it fails with exit status of 125 when given too few arguments,
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# except that POSIX requires 127 in this case.
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nohup >/dev/null 2>&1
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test $? = 125 || fail=1
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POSIXLY_CORRECT=1 nohup >/dev/null 2>&1
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test $? = 127 || fail=1
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Exit $fail
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