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25 .TH FSTATAT 2 2013-07-21 "Linux" "Linux Programmer's Manual"
27 fstatat \- get file status relative to a directory file descriptor
30 .B #include <fcntl.h> /* Definition of AT_* constants */
31 .B #include <sys/stat.h>
33 .BI "int fstatat(int " dirfd ", const char *" pathname ", struct stat *" \
39 Feature Test Macro Requirements for glibc (see
40 .BR feature_test_macros (7)):
49 _XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L
59 system call operates in exactly the same way as
61 except for the differences described in this manual page.
63 If the pathname given in
65 is relative, then it is interpreted relative to the directory
66 referred to by the file descriptor
68 (rather than relative to the current working directory of
69 the calling process, as is done by
71 for a relative pathname).
81 is interpreted relative to the current working
82 directory of the calling process (like
92 can either be 0, or include one or more of the following flags ORed:
94 .BR AT_EMPTY_PATH " (since Linux 2.6.39)"
95 .\" commit 65cfc6722361570bfe255698d9cd4dccaf47570d
98 is an empty string, operate on the file referred to by
99 in which case the call operates on the file referred to by
101 (which may have been obtained using the
107 can refer to any type of file, not just a directory.
110 .BR AT_NO_AUTOMOUNT " (since Linux 2.6.38)"
111 Don't automount the terminal ("basename") component of
113 if it is a directory that is an automount point.
114 This allows the caller to gather attributes of an automount point
115 (rather than the location it would mount).
116 This flag can be used in tools that scan directories
117 to prevent mass-automounting of a directory of automount points.
120 flag has no effect if the mount point has already been mounted over.
122 .B AT_SYMLINK_NOFOLLOW
125 is a symbolic link, do not dereference it:
126 instead return information about the link itself, like
130 dereferences symbolic links, like
136 On error, \-1 is returned and
138 is set to indicate the error.
140 The same errors that occur for
144 The following additional errors can occur for
149 is not a valid file descriptor.
152 Invalid flag specified in
159 is a file descriptor referring to a file other than a directory.
162 was added to Linux in kernel 2.6.16;
163 library support was added to glibc in version 2.4.
166 A similar system call exists on Solaris.
170 for an explanation of the need for
173 The underlying system call employed by the glibc
175 wrapper function is actually called
180 .BR path_resolution (7),