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32 .\" @(#)chown.2 8.4 (Berkeley) 4/19/94
33 .\" $FreeBSD: src/lib/libc/sys/chown.2,v 1.12.2.6 2001/12/14 18:34:00 ru Exp $
34 .\" $DragonFly: src/lib/libc/sys/chown.2,v 1.2 2003/06/17 06:26:47 dillon Exp $
43 .Nd change owner and group of a file
49 .Fn chown "const char *path" "uid_t owner" "gid_t group"
51 .Fn fchown "int fd" "uid_t owner" "gid_t group"
53 .Fn lchown "const char *path" "uid_t owner" "gid_t group"
55 The owner ID and group ID of the file
60 is changed as specified by the arguments
64 The owner of a file may change the
67 he or she is a member,
70 capability is restricted to the super-user.
73 clears the set-user-id and set-group-id bits
75 to prevent accidental or mischievous creation of
76 set-user-id and set-group-id programs if not executed
79 follows symbolic links to operate on the target of the link
80 rather than the link itself.
83 is particularly useful when used in conjunction
84 with the file locking primitives (see
90 but does not follow symbolic links.
92 One of the owner or group id's
93 may be left unchanged by specifying it as -1.
100 will fail and the file will be unchanged if:
103 A component of the path prefix is not a directory.
104 .It Bq Er ENAMETOOLONG
105 A component of a pathname exceeded 255 characters,
106 or an entire path name exceeded 1023 characters.
108 The named file does not exist.
110 Search permission is denied for a component of the path prefix.
112 Too many symbolic links were encountered in translating the pathname.
114 The effective user ID is not the super-user.
116 The named file resides on a read-only file system.
119 points outside the process's allocated address space.
121 An I/O error occurred while reading from or writing to the file system.
129 does not refer to a valid descriptor.
132 refers to a socket, not a file.
134 The effective user ID is not the super-user.
136 The named file resides on a read-only file system.
138 An I/O error occurred while reading from or writing to the file system.
148 function call is expected to conform to
153 function call appeared in
163 function was changed to follow symbolic links in
167 function was added in
169 to compensate for the loss of functionality.