| 1 | .\" Copyright (c) 1980 Regents of the University of California.
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| 2 | .\" All rights reserved. The Berkeley software License Agreement
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| 3 | .\" specifies the terms and conditions for redistribution.
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| 4 | .\"
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| 5 | .\" @(#)link.2 6.3 (Berkeley) 8/26/85
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| 6 | .\"
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| 7 | .TH LINK 2 "August 26, 1985"
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| 8 | .UC 4
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| 9 | .SH NAME
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| 10 | link \- make a hard link to a file
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| 11 | .SH SYNOPSIS
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| 12 | .nf
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| 13 | .ft B
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| 14 | #include <unistd.h>
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| 15 |
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| 16 | int link(const char *\fIname1\fP, const char *\fIname2\fP)
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| 17 | .fi
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| 18 | .ft R
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| 19 | .SH DESCRIPTION
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| 20 | A hard link
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| 21 | to
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| 22 | .I name1
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| 23 | is created;
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| 24 | the link has the name
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| 25 | .IR name2 .
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| 26 | .I Name1
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| 27 | must exist.
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| 28 | .PP
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| 29 | With hard links,
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| 30 | both
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| 31 | .I name1
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| 32 | and
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| 33 | .I name2
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| 34 | must be in the same file system.
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| 35 | .I Name1
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| 36 | must not be a directory.
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| 37 | Both the old and the new
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| 38 | .I link
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| 39 | share equal access and rights to
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| 40 | the underlying object.
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| 41 | .SH "RETURN VALUE
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| 42 | Upon successful completion, a value of 0 is returned. Otherwise,
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| 43 | a value of \-1 is returned and
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| 44 | .B errno
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| 45 | is set to indicate the error.
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| 46 | .SH "ERRORS
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| 47 | .B Link
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| 48 | will fail and no link will be created if one or more of the following
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| 49 | are true:
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| 50 | .TP 15
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| 51 | [ENOTDIR]
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| 52 | A component of either path prefix is not a directory.
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| 53 | .TP 15
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| 54 | [ENAMETOOLONG]
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| 55 | A path name exceeds PATH_MAX characters.
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| 56 | .TP 15
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| 57 | [ENOENT]
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| 58 | A component of either path prefix does not exist.
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| 59 | .TP 15
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| 60 | [EACCES]
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| 61 | A component of either path prefix denies search permission.
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| 62 | .TP 15
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| 63 | [EACCES]
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| 64 | The requested link requires writing in a directory with a mode
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| 65 | that denies write permission.
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| 66 | .TP 15
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| 67 | [ELOOP]
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| 68 | Too many symbolic links were encountered in translating one of the pathnames.
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| 69 | (Minix-vmd)
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| 70 | .TP 15
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| 71 | [ENOENT]
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| 72 | The file named by \fIname1\fP does not exist.
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| 73 | .TP 15
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| 74 | [EEXIST]
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| 75 | The link named by \fIname2\fP does exist.
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| 76 | .TP 15
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| 77 | [EPERM]
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| 78 | The file named by \fIname1\fP is a directory and the effective
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| 79 | user ID is not super-user.
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| 80 | .TP 15
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| 81 | [EXDEV]
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| 82 | The link named by \fIname2\fP and the file named by \fIname1\fP
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| 83 | are on different file systems.
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| 84 | .TP 15
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| 85 | [ENOSPC]
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| 86 | The directory in which the entry for the new link is being placed
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| 87 | cannot be extended because there is no space left on the file
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| 88 | system containing the directory.
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| 89 | .ig
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| 90 | .TP 15
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| 91 | [EDQUOT]
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| 92 | The directory in which the entry for the new link
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| 93 | is being placed cannot be extended because the
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| 94 | user's quota of disk blocks on the file system
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| 95 | containing the directory has been exhausted.
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| 96 | ..
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| 97 | .TP 15
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| 98 | [EIO]
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| 99 | An I/O error occurred while reading from or writing to
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| 100 | the file system to make the directory entry.
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| 101 | .TP 15
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| 102 | [EROFS]
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| 103 | The requested link requires writing in a directory on a read-only file
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| 104 | system.
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| 105 | .TP 15
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| 106 | [EFAULT]
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| 107 | One of the pathnames specified
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| 108 | is outside the process's allocated address space.
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| 109 | .SH "SEE ALSO"
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| 110 | .BR symlink (2),
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| 111 | .BR unlink (2).
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