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symlink(2)
symlink(2) System Calls symlink(2)
NAME
symlink, symlinkat - make a symbolic link to a file
SYNOPSIS
#include <unistd.h>
int symlink(const char *path1, const char *path2);
int symlinkat(const char *path1, int fd, const char *path2);
DESCRIPTION
The symlink() function creates a symbolic link path2 to the file path1.
Either name may be an arbitrary pathname, the files need not be on the
same file system, and path1 may be non-existent.
The file to which the symbolic link points is used when an open(2)
operation is performed on the link. A stat() operation performed on a
symbolic link returns the linked-to file, while an lstat() operation
returns information about the link itself. See stat(2). Unexpected
results may occur when a symbolic link is made to a directory. To avoid
confusion in applications, the readlink(2) call can be used to read the
contents of a symbolic link.
The symlinkat() function is equivalent to the symlink() function except
in the case where path2 specifies a relative path. In this case the
symbolic link is created relative to the directory associated with the
file descriptor fd instead of the current working directory. If the
file descriptor was opened without O_SEARCH, the function checks
whether directory searches are permitted using the current permissions
of the directory underlying the file descriptor. If the file descriptor
was opened with O_SEARCH, the function does not perform the check.
If symlinkat() is passed the special value AT_FDCWD in the fd parame‐
ter, the current working directory is used and the behavior is identi‐
cal to a call to symlink().
RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, −1 is returned,
errno is set to indicate the error, and the symbolic link is not made.
ERRORS
The symlink() and symlinkat() functions will fail if:
EACCES Write permission is denied in the directory where the
symbolic link is being created, or search permission is
denied for a component of the path prefix of path2.
EDQUOT The directory where the entry for the new symbolic link
is being placed cannot be extended because the user's
quota of disk blocks on that file system has been
exhausted; the new symbolic link cannot be created
because the user's quota of disk blocks on that file
system has been exhausted; or the user's quota of
inodes on the file system where the file is being cre‐
ated has been exhausted.
EEXIST The file referred to by path2 already exists.
EFAULT The path1 or path2 argument points to an illegal
address.
EILSEQ The path argument includes non-UTF8 characters and the
file system accepts only file names where all charac‐
ters are part of the UTF-8 character codeset.
EIO An I/O error occurs while reading from or writing to
the file system.
ELOOP Too many symbolic links are encountered in translating
path2.
ENAMETOOLONG The length of the path2 argument exceeds PATH_MAX, or
the length of a path2 component exceeds NAME_MAX while
_POSIX_NO_TRUNC is in effect.
This error can also be returned if the length of the
path1 argument exceeds SYMLINK_MAX.
ENOENT A component of the path prefix of path2 does not exist.
ENOSPC The directory in which the entry for the new symbolic
link is being placed cannot be extended because no
space is left on the file system containing the direc‐
tory; the new symbolic link cannot be created because
no space is left on the file system which will contain
the link; or there are no free inodes on the file sys‐
tem on which the file is being created.
ENOSYS The file system does not support symbolic links.
ENOTDIR A component of the path prefix of path2 is not a direc‐
tory.
EROFS The file path2 would reside on a read-only file system.
The symlinkat() function will fail if:
EACCES fd was not opened with O_SEARCH and the permissions of the
directory underlying fd do not permit directory searches.
EBADF The path2 argument does not specify an absolute path and the
fd argument is neither AT_FDCWD nor a valid file descriptor
open for reading or searching.
The symlink() and symlinkat() functions may fail if:
ELOOP More than {SYMLOOP_MAX} symbolic links were encountered
during resolution of the path2 argument.
ENAMETOOLONG The length of the path2 argument exceeds {PATH_MAX} or
pathname resolution of a symbolic link in the path2
argument produced an intermediate result with a length
that exceeds {PATH_MAX}.
The symlinkat() function may fail if:
ENOTDIR The path2 argument is not an absolute path and fd is neither
AT_FDCWD nor a file descriptor associated with a directory
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
tab() box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) ATTRIBUTE TYPEAT‐
TRIBUTE VALUE _ Interface StabilityCommitted _ StandardSee stan‐
dards(7). _ MT-LevelAsync-Signal-Safe
SEE ALSO
cp(1), link(2), open(2), readlink(2), stat(2), unlink(2), attributes(7)
Oracle Solaris 11.4 13 Jun 2018 symlink(2)