1FUTIMES(3)                 Linux Programmer's Manual                FUTIMES(3)
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NAME

6       futimes, lutimes - change file timestamps
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SYNOPSIS

9       #include <sys/time.h>
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11       int futimes(int fd, const struct timeval tv[2]);
12       int lutimes(const char *filename, const struct timeval tv[2]);
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14   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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16       futimes(), lutimes():
17           Since glibc 2.19:
18               _DEFAULT_SOURCE
19           Glibc 2.19 and earlier:
20               _BSD_SOURCE
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DESCRIPTION

23       futimes()  changes  the  access and modification times of a file in the
24       same way as utimes(2), with the difference that the  file  whose  time‐
25       stamps are to be changed is specified via a file descriptor, fd, rather
26       than via a pathname.
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28       lutimes() changes the access and modification times of a  file  in  the
29       same way as utimes(2), with the difference that if filename refers to a
30       symbolic link, then the link is not dereferenced:  instead,  the  time‐
31       stamps of the symbolic link are changed.
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RETURN VALUE

34       On  success,  zero is returned.  On error, -1 is returned, and errno is
35       set to indicate the error.
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ERRORS

38       Errors are as for utimes(2),  with  the  following  additions  for  fu‐
39       times():
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41       EBADF  fd is not a valid file descriptor.
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43       ENOSYS The /proc filesystem could not be accessed.
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45       The following additional error may occur for lutimes():
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47       ENOSYS The  kernel does not support this call; Linux 2.6.22 or later is
48              required.
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VERSIONS

51       futimes() is available since glibc 2.3.  lutimes() is  available  since
52       glibc 2.6, and is implemented using the utimensat(2) system call, which
53       is supported since kernel 2.6.22.
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ATTRIBUTES

56       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
57       tributes(7).
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59       ┌────────────────────────────────────────────┬───────────────┬─────────┐
60       │Interface                                   │ Attribute     │ Value   │
61       ├────────────────────────────────────────────┼───────────────┼─────────┤
62       │futimes(), lutimes()                        │ Thread safety │ MT-Safe │
63       └────────────────────────────────────────────┴───────────────┴─────────┘
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CONFORMING TO

66       These  functions  are not specified in any standard.  Other than Linux,
67       they are available only on the BSDs.
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SEE ALSO

70       utime(2), utimensat(2), symlink(7)
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COLOPHON

73       This page is part of release 5.12 of the Linux  man-pages  project.   A
74       description  of  the project, information about reporting bugs, and the
75       latest    version    of    this    page,    can     be     found     at
76       https://www.kernel.org/doc/man-pages/.
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80Linux                             2021-03-22                        FUTIMES(3)
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