euidaccess, eaccess — check effective user's permissions for a file
#define _GNU_SOURCE #include <unistd.h>
int
euidaccess( |
const char * | pathname, |
| int | mode); |
int
eaccess( |
const char * | pathname, |
| int | mode); |
Like access(2), euidaccess() checks permissions and
existence of the file identified by its argument pathname. However, whereas
access(2), performs checks
using the real user and group identifiers of the process,
euidaccess() uses the effective
identifiers.
mode is a mask
consisting of one or more of R_OK, W_OK,
X_OK and F_OK, with the same meanings as for
access(2).
eaccess() is a synonym for
euidaccess(), provided for
compatibility with some other systems.
On success (all requested permissions granted), zero is
returned. On error (at least one bit in mode asked for a permission
that is denied, or some other error occurred), −1 is
returned, and errno is set
appropriately.
access(2), chmod(2), chown(2), faccessat(2), open(2), setgid(2), setuid(2), stat(2), credentials(7), path_resolution(7)