Edit report at https://bugs.php.net/bug.php?id=60081&edit=1
ID: 60081
Comment by: zburlindibus at gmail dot com
Reported by: zburlindibus at gmail dot com
Summary: /bin/sh hardcoded in proc_open.c
Status: Open
Type: Bug
Package: *Configuration Issues
Operating System: ARM cross-compile
PHP Version: 5.3.8
Block user comment: N
Private report: N
New Comment:
After further investigation, it seems that the proc_open.c code is not actually
called in case of system(...) / exec(...).
PHP apparently delegates to libc::system(...) call to do the PHP system / exec
calls. However, libc standard is to assume /bin/sh as shell - and thus, it has
it hardcoded.
I have changed the sourcecode of uClibc to use /system/bin/sh, statically
linked PHP against it, and not it works.
I guess this bug can be closed - but I'd like to know what proc_open.c does in
fact (since /bin/sh is hardcoded there too).
Previous Comments:
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[2011-10-17 21:42:06] zburlindibus at gmail dot com
Description:
------------
I've managed to cross-compile PHP 5.3.8 for ARM platforms (to be run on rooted
Android phones).
The trouble is that when you execute a system('pwd'), the command doesn't print
any output (and it doesn't execute pwd).
A strace indicates that PHP tries to execute /bin/sh -c pwd in fact.
However, on Android phones, /bin/sh doesn't exist (like in Linux distros), but
in fact the path is /system/bin/sh.
Mounting / as read-write and creating /bin/sh to point to /system/bin/sh is
more difficult than allowing a configuration key/value pair to point to the
executable itself.
Or use the SHELL environment variables ?
It should not be hardcoded (I found this only using strace - there's no error
message in case the command fails because /bin/sh is not found) - or at least,
it should use the SHELL environment variable in case /bin/sh doesn't exist).
Expected result:
----------------
I expect system('pwd') to work.
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