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| .TH FUTIMESAT 2 2017-09-15 "Linux" "Linux Programmer's Manual" |
| .SH NAME |
| futimesat \- change timestamps of a file relative to a \ |
| directory file descriptor |
| .SH SYNOPSIS |
| .nf |
| .B #include <fcntl.h> /* Definition of AT_* constants */ |
| .B #include <sys/time.h> |
| .PP |
| .BI "int futimesat(int " dirfd ", const char *" pathname , |
| .BI " const struct timeval " times [2]); |
| .fi |
| .PP |
| .in -4n |
| Feature Test Macro Requirements for glibc (see |
| .BR feature_test_macros (7)): |
| .in |
| .PP |
| .BR futimesat (): |
| _GNU_SOURCE |
| .SH DESCRIPTION |
| This system call is obsolete. |
| Use |
| .BR utimensat (2) |
| instead. |
| .PP |
| The |
| .BR futimesat () |
| system call operates in exactly the same way as |
| .BR utimes (2), |
| except for the differences described in this manual page. |
| .PP |
| If the pathname given in |
| .I pathname |
| is relative, then it is interpreted relative to the directory |
| referred to by the file descriptor |
| .I dirfd |
| (rather than relative to the current working directory of |
| the calling process, as is done by |
| .BR utimes (2) |
| for a relative pathname). |
| .PP |
| If |
| .I pathname |
| is relative and |
| .I dirfd |
| is the special value |
| .BR AT_FDCWD , |
| then |
| .I pathname |
| is interpreted relative to the current working |
| directory of the calling process (like |
| .BR utimes (2)). |
| .PP |
| If |
| .I pathname |
| is absolute, then |
| .I dirfd |
| is ignored. |
| .SH RETURN VALUE |
| On success, |
| .BR futimesat () |
| returns a 0. |
| On error, \-1 is returned and |
| .I errno |
| is set to indicate the error. |
| .SH ERRORS |
| The same errors that occur for |
| .BR utimes (2) |
| can also occur for |
| .BR futimesat (). |
| The following additional errors can occur for |
| .BR futimesat (): |
| .TP |
| .B EBADF |
| .I dirfd |
| is not a valid file descriptor. |
| .TP |
| .B ENOTDIR |
| .I pathname |
| is relative and |
| .I dirfd |
| is a file descriptor referring to a file other than a directory. |
| .SH VERSIONS |
| .BR futimesat () |
| was added to Linux in kernel 2.6.16; |
| library support was added to glibc in version 2.4. |
| .SH CONFORMING TO |
| This system call is nonstandard. |
| It was implemented from a specification that was proposed for POSIX.1, |
| but that specification was replaced by the one for |
| .BR utimensat (2). |
| .PP |
| A similar system call exists on Solaris. |
| .SH NOTES |
| .SS Glibc notes |
| If |
| .I pathname |
| is NULL, then the glibc |
| .BR futimesat () |
| wrapper function updates the times for the file referred to by |
| .IR dirfd . |
| .\" The Solaris futimesat() also has this strangeness. |
| .SH SEE ALSO |
| .BR stat (2), |
| .BR utimensat (2), |
| .BR utimes (2), |
| .BR futimes (3), |
| .BR path_resolution (7) |