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home | helpCHFLAGS(2) FreeBSD System Calls Manual CHFLAGS(2) NAME chflags, fchflags - set file flags LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <sys/stat.h> #include <unistd.h> int chflags(const char *path, u_long flags); int fchflags(int fd, u_long flags); DESCRIPTION The file whose name is given by path or referenced by the descriptor fd has its flags changed to flags. The flags specified are formed by or'ing the following values UF_NODUMP Do not dump the file. UF_IMMUTABLE The file may not be changed. UF_APPEND The file may only be appended to. UF_NOUNLINK The file may not be renamed or deleted. UF_OPAQUE The directory is opaque when viewed through a union stack. SF_ARCHIVED The file may be archived. SF_IMMUTABLE The file may not be changed. SF_APPEND The file may only be appended to. SF_NOUNLINK The file may not be renamed or deleted. The ``UF_IMMUTABLE'', ``UF_APPEND'', ``UF_NOUNLINK'', ``UF_NODUMP'', and ``UF_OPAQUE'' flags may be set or unset by either the owner of a file or the super-user. The ``SF_IMMUTABLE'', ``SF_APPEND'', ``SF_NOUNLINK'', and ``SF_ARCHIVED'' flags may only be set or unset by the super-user. Attempts by the non- super-user to set the super-user only flags are silently ignored. These flags may be set at any time, but normally may only be unset when the system is in single-user mode. (See init(8) for details.) RETURN VALUES Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS Chflags() will fail if: [ENOTDIR] A component of the path prefix is not a directory. [ENAMETOOLONG] A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters. [ENOENT] The named file does not exist. [EACCES] Search permission is denied for a component of the path prefix. [ELOOP] Too many symbolic links were encountered in translating the pathname. [EPERM] The effective user ID does not match the owner of the file and the effective user ID is not the super-user. [EROFS] The named file resides on a read-only file system. [EFAULT] Path points outside the process's allocated address space. [EIO] An I/O error occurred while reading from or writing to the file system. [EOPNOTSUPP] The underlying file system does not support file flags. Fchflags() will fail if: [EBADF] The descriptor is not valid. [EINVAL] fd refers to a socket, not to a file. [EPERM] The effective user ID does not match the owner of the file and the effective user ID is not the super-user. [EROFS] The file resides on a read-only file system. [EIO] An I/O error occurred while reading from or writing to the file system. [EOPNOTSUPP] The underlying file system does not support file flags. SEE ALSO chflags(1), fflagstostr(3), strtofflags(3), init(8), mount_union(8) HISTORY The chflags and fchflags functions first appeared in 4.4BSD. FreeBSD 11.0-PRERELEASE May 2, 1995 FreeBSD 11.0-PRERELEASE
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY
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