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Doc Bug #79071 Undocumented truncation of tempnam() second parameter
Submitted: 2020-01-06 14:11 UTC Modified: 2020-02-09 14:26 UTC
Votes:2
Avg. Score:4.0 ± 1.0
Reproduced:2 of 2 (100.0%)
Same Version:1 (50.0%)
Same OS:2 (100.0%)
From: fabienung at hotmail dot fr Assigned: cmb (profile)
Status: Closed Package: Filesystem function related
PHP Version: 7.4.1 OS: Linux
Private report: No CVE-ID: None
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 [2020-01-06 14:11 UTC] fabienung at hotmail dot fr 
Description:
------------
tempnam() will truncate the second argument after 63 characters 

see: https://github.com/php/php-src/blob/bbcfa66e06110d8256595e644378a5358dda3558/ext/standard/file.c#L836-L839

introduced in commit : 
https://github.com/php/php-src/commit/4ca3df56d356ed8c3b55695ed588783e3f91378c

Test script:
---------------
var_dump(tempnam('/tmp', 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbbbbbbbbbbcdefghijklm'));

string(74) "/tmp/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabbbbbbbbbbbbFkS7ld"

Expected result:
----------------
It should be documented, also maybe either do not truncate or warn if there is a truncation.

Actual result:
--------------
Silent truncation.

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 [2020-01-06 14:41 UTC] cmb@php.net
-Status: Open +Status: Verified
 [2020-01-06 14:41 UTC] cmb@php.net 
Since this truncation happens as of PHP 5.1.3, in my opinion just
documenting the fact should be sufficient.
 [2020-02-09 14:25 UTC] cmb@php.net 
Automatic comment from SVN on behalf of cmb
Revision: http://svn.php.net/viewvc/?view=revision&revision=349191
Log: Fix #79071: Undocumented truncation of tempnam() second parameter
 [2020-02-09 14:26 UTC] cmb@php.net
-Status: Verified +Status: Closed -Assigned To: +Assigned To: cmb
 [2020-02-09 14:26 UTC] cmb@php.net 
This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.

Thank you for the report, and for helping us make our documentation better.
 [2020-02-09 16:01 UTC] phpdocbot@php.net 
Automatic comment on behalf of cmb
Revision: http://git.php.net/?p=doc/en.git;a=commit;h=58d190bce3ee0db136502bd705e7d515ba9d9447
Log: Fix #79071: Undocumented truncation of tempnam() second parameter
 [2020-02-09 23:39 UTC] mumumu@php.net 
Automatic comment from SVN on behalf of mumumu
Revision: http://svn.php.net/viewvc/?view=revision&revision=349192
Log: Fix #79071: Undocumented truncation of tempnam() second parameter
 [2020-02-10 14:20 UTC] phpdocbot@php.net 
Automatic comment on behalf of mumumu
Revision: http://git.php.net/?p=doc/ja.git;a=commit;h=aebb4478adb18c9629fdc89bba24efde92f7e7ff
Log: Fix #79071: Undocumented truncation of tempnam() second parameter
 [2020-12-30 11:59 UTC] nikic@php.net 
Automatic comment on behalf of mumumu
Revision: http://git.php.net/?p=doc/ja.git;a=commit;h=e306c3fae35e6bd758f77ee0b0b016344d767189
Log: Fix #79071: Undocumented truncation of tempnam() second parameter
 
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