Table of Contentschown, fchown - change ownership of a file #include <sys/types.h>
#include <unistd.h> int chown(const char *path, uid_t owner, gid_t group);
int fchown(int fd, uid_t owner, gid_t group);
The owner of the file specified by path or by fd is changed. Only the super-user may change the owner of a file. The owner of a file may change the group of the file to any group of which that owner is a member. The super-user may change the group arbitrarily. If the owner or group is specified as -1, then that ID is not changed.
On success, zero is returned. On error, -1 is returned, and errno is set appropriately. Depending on the file system, other errors can be returned. The more general errors for chown are listed below:
- EPERM
- The effective UID does not match the owner of the file, and is not zero; or the owner or group were specified incorrectly.
- EROFS
- The named file resides on a read-only file system.
- EFAULT
- path points outside your accessible address space.
- ENAMETOOLONG
- path is too long.
- ENOENT
- The file does not exist.
- ENOMEM
- Insufficient kernel memory was available.
- ENOTDIR
- A component of the path prefix is not a directory.
- EACCES
- Search permission is denied on a component of the path prefix.
- ELOOP
- path contains a circular reference (i.e., via a symbolic link)
The general errors for fchown are listed below:
- EBADF
- The descriptor is not value.
- ENOENT
- See above.
- EPERM
- See above.
- EROFS
- See above.
The prototype for fchown is only available if __USE_BSD is defined. chmod(2), flock(2)
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