85 lines
2 KiB
Groff
85 lines
2 KiB
Groff
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.\" Copyright (c) 1980 Regents of the University of California.
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.\" All rights reserved. The Berkeley software License Agreement
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.\" specifies the terms and conditions for redistribution.
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.\"
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.\" @(#)unlink.2 6.2 (Berkeley) 5/22/85
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.\"
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.TH UNLINK 2 "May 22, 1985"
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.UC 4
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.SH NAME
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unlink \- remove directory entry
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.SH SYNOPSIS
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.nf
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.ft B
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#include <unistd.h>
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int unlink(const char *path)
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.fi
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.ft R
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.SH DESCRIPTION
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.B Unlink
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removes the entry for the file
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.I path
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from its directory.
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If this entry was the last link to the file,
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and no process has the file open, then
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all resources associated with the file are reclaimed.
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If, however, the file was open in any process, the actual
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resource reclamation is delayed until it is closed,
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even though the directory entry has disappeared.
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.SH "RETURN VALUE
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Upon successful completion, a value of 0 is returned.
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Otherwise, a value of \-1 is returned and
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.B errno
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is set to indicate the error.
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.SH "ERRORS
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The \fIunlink\fP succeeds unless:
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.TP 15
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[ENOTDIR]
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A component of the path prefix is not a directory.
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.TP 15
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[ENAMETOOLONG]
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The path name exceeds PATH_MAX characters.
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.TP 15
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[ENOENT]
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The named file does not exist.
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.TP 15
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[EACCES]
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Search permission is denied for a component of the path prefix.
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.TP 15
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[EACCES]
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Write permission is denied on the directory containing the link
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to be removed.
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.TP 15
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[ELOOP]
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Too many symbolic links were encountered in translating the pathname.
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(Minix-vmd)
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.TP 15
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[EPERM]
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The named file is a directory.
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.TP 15
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[EPERM]
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The directory containing the file is marked sticky,
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and neither the containing directory nor the file to be removed
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are owned by the effective user ID.
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(Minix-vmd)
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.TP 15
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[EBUSY]
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The entry to be unlinked is the mount point for a
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mounted file system.
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.TP 15
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[EIO]
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An I/O error occurred while deleting the directory entry
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or deallocating the inode.
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.TP 15
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[EROFS]
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The named file resides on a read-only file system.
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.TP 15
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[EFAULT]
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.I Path
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points outside the process's allocated address space.
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.SH "SEE ALSO"
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.BR close (2),
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.BR link (2),
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.BR rmdir (2).
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