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cd8c48cc5a
This change adds the -e flag to the cd builtin, as specified in <https://www.austingroupbugs.net/view.php?id=253>. The -e flag is used to verify if the the current working directory after 'cd -P' successfully changes the directory, and returns with exit status 1 if the cwd couldn't be determined. Additionally, it causes all other errors to return with exit status >1 (i.e., status 2 unless ENOMEM occurs) if -e and -P are both active. src/cmd/ksh93/bltins/cd_pwd.c: - Add -e option to the cd builtin command. It verifies $PWD by using test_inode() to execute the equivalent of [[ . -ef $PWD ]]. - The check for restricted mode has been moved after optget to allow 'cd -eP' to return with exit status 2 when in restricted mode. To avoid changing the previous behavior of cd when -e isn't passed, extra checks have been added to prevent cd from printing usage information in restricted mode. src/cmd/ksh93/tests/builtins.sh: - Add regression tests for the exit status when using the cd -P flag with and without -e. src/cmd/ksh93/data/builtins.c, src/cmd/ksh93/sh.1: - Document the addition of -e to the cd builtin. |
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