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25 .TH UNLINKAT 2 2012-05-04 "Linux" "Linux Programmer's Manual"
27 unlinkat \- remove a directory entry relative to a directory file descriptor
30 .B #include <fcntl.h> /* Definition of AT_* constants */
31 .B #include <unistd.h>
33 .BI "int unlinkat(int " dirfd ", const char *" pathname ", int " flags );
37 Feature Test Macro Requirements for glibc (see
38 .BR feature_test_macros (7)):
47 _XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L
57 system call operates in exactly the same way as either
61 (depending on whether or not
66 except for the differences described in this manual page.
68 If the pathname given in
70 is relative, then it is interpreted relative to the directory
71 referred to by the file descriptor
73 (rather than relative to the current working directory of
74 the calling process, as is done by
78 for a relative pathname).
80 If the pathname given in
88 is interpreted relative to the current working
89 directory of the calling process (like
94 If the pathname given in
101 is a bit mask that can either be specified as 0, or by ORing
102 together flag values that control the operation of
104 Currently only one such flags is defined:
109 performs the equivalent of
115 flag is specified, then
116 performs the equivalent of
124 On error, \-1 is returned and
126 is set to indicate the error.
128 The same errors that occur for
134 The following additional errors can occur for
139 is not a valid file descriptor.
142 An invalid flag value was specified in
149 is a file descriptor referring to a file other than a directory.
152 was added to Linux in kernel 2.6.16;
153 library support was added to glibc in version 2.4.
156 A similar system call exists on Solaris.
160 for an explanation of the need for
166 .BR path_resolution (7)