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Bug #43373 pcntl_fork() causes a fatal error instead of returning -1
Submitted: 2007-11-22 11:57 UTC Modified: 2007-11-27 17:14 UTC
Avg. Score:4.5 ± 0.5
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:0 (0.0%)
From: trot at plotinka dot ru Assigned:
Status: Closed Package: PCNTL related
PHP Version: 5.2.5 OS: Unix
Private report: No CVE-ID:
 [2007-11-22 11:57 UTC] trot at plotinka dot ru
untraceable "Fatal error: pcntl_fork(): Error 35"

P.S.: CLI mode.

Reproduce code:
$pid = pcntl_fork();

Expected result:
$pid == -1; // true

Actual result:
Fatal error: pcntl_fork(): Error 35 in ...


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 [2007-11-23 08:07 UTC] trot at plotinka dot ru
ext/pcntl/pcntl.c line 227

        if (id == -1) {
                php_error_docref(NULL TSRMLS_CC, E_ERROR, "Error %d", errno);
 [2007-11-25 17:32 UTC]
Exactly what are you reporting here? What's the bug?

 [2007-11-26 12:46 UTC] trot at plotinka dot ru
Fatal error on failure.

But in manual:
"On failure, a -1 will be returned in the parent's context"

 [2007-11-26 23:15 UTC] development at domain51 dot com
I just ran into this issue as well...  I was testing PHP's speed at forking N processes and I hit an issue where the OS wasn't able to fork any more processes.  Instead of getting a -1 response, the code referenced below triggers a fatal error and halts PHP.

In other words, the check on line 227 referenced by trot at plotinka dot ru should be deleted.  "-1" is a valid return value and should not trigger an error any failure is encountered during the fork.
 [2007-11-27 17:14 UTC]
This bug has been fixed in CVS.

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