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On AIX, access(X_OK) may succeed when run as root even if the execution isn't possible. This behavior is allowed by POSIX which says: ... for a process with appropriate privileges, an implementation may indicate success for X_OK even if execute permission is not granted to any user. It can lead hook programs to have their execution refused: git commit -m content fatal: cannot exec '.git/hooks/pre-commit': Permission denied Add NEED_ACCESS_ROOT_HANDLER in order to use an access helper function. It checks with stat if any executable flags is set when the current user is root. Signed-off-by: Clément Chigot <clement.chigot@atos.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
32 lines
669 B
C
32 lines
669 B
C
#define COMPAT_CODE_ACCESS
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#include "../git-compat-util.h"
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/* Do the same thing access(2) does, but use the effective uid,
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* and don't make the mistake of telling root that any file is
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* executable. This version uses stat(2).
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*/
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int git_access(const char *path, int mode)
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{
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struct stat st;
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/* do not interfere a normal user */
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if (geteuid())
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return access(path, mode);
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if (stat(path, &st) < 0)
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return -1;
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/* Root can read or write any file. */
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if (!(mode & X_OK))
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return 0;
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/* Root can execute any file that has any one of the execute
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* bits set.
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*/
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if (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
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return 0;
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errno = EACCES;
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return -1;
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}
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