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I'm redirecting the stdout of php process(cli mode) to a file.

Why exit code is 0 when disk is full.

I can reappear this problem in php 7.1/5.6/5.4 and both in macos and centos.

leojins-MacBook-Pro-2:Downloads leojin$ php test.php > /Volumes/disk_test/test.log
leojins-MacBook-Pro-2:Downloads leojin$ echo $?
0
leojins-MacBook-Pro-2:Downloads leojin$ df -h
Filesystem      Size   Used  Avail Capacity iused               ifree %iused  Mounted on
/dev/disk1s1   233Gi   27Gi  205Gi    12%  580000 9223372036854195807    0%   /
devfs          189Ki  189Ki    0Bi   100%     654                   0  100%   /dev
/dev/disk1s4   233Gi  1.0Gi  205Gi     1%       1 9223372036854775806    0%   /private/var/vm
map -hosts       0Bi    0Bi    0Bi   100%       0                   0  100%   /net
map auto_home    0Bi    0Bi    0Bi   100%       0                   0  100%   /home
/dev/disk2s1    95Mi   93Mi  1.5Mi    99%      96 9223372036854775711    0%   /Volumes/disk_test

Following is the content of test.php:

<?php
$i = 0;
while (true) {
    echo "php:" . $i . "\n";
    $i++;
}

When i use python, it exit with 1 as expected.

leojins-MacBook-Pro-2:Downloads leojin$ python test.py > /Volumes/disk_test/test.log
Traceback (most recent call last):
  File "test.py", line 3, in <module>
    print 'python:' + str(i)
IOError: [Errno 28] No space left on device
leojins-MacBook-Pro-2:Downloads leojin$ echo $?
1

Following is the content of test.py:

i = 0 
while True:
    print 'python:' + str(i)
    i = i + 1

I also tried php -d implicit_flush=0 and python -u, there is no difference.

miken32
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LeoJin
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1 Answers1

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Your PHP code does no writing to disk, nor are you setting an exit status anywhere in your code. So, it has no reason to exit abnormally. If you want to check if a disk is full, I suggest you do that in your shell, or in PHP.

I'm not that familiar with it but I'd guess your Python interpreter is probably throwing this error because the code is compiled to bytecode before being executed. If there's no space then it would be unable to perform this intermediate step.

miken32
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