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How to enable the chroot() function in PHP 5.4?

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It was easy in PHP 5.3 as long as you were building the CLI by itself. In the PHP 5.4 configure script there is a new PHP_BINARIES variable being used instead of setting PHP_SAPI=cli and thus the "#define ENABLE_CHROOT_FUNC 1" is never written to the output file. I have been able to manually enable it by adding the define to the main/php_config.h after running configure. The issue seems to be a line: if test
"program" = "program". This comparison being true is what causes the configure script to add "cli" to the PHP_BINARIES variable instead of setting the PHP_SAPI variable. The other prerequisites (HAVE_CHROOT and ZTS) are all at the required settings. It is only the ENABLE_CHROOT_FUNC which is causing the function to not be compiled into the resulting binary. Any information or explanation would be very helpful.

For the record, I know what the chroot() function does and does not do. I am experimenting with using chroot() to isolate an already running script to a particular subset of the filesystem for file operations.

posted Jun 13, 2013 by anonymous

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