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]);
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13       int lutimes(const char *filename, const struct timeval tv[2]);
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15   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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17       futimes(), lutimes():
18           Since glibc 2.19:
19               _DEFAULT_SOURCE
20           Glibc 2.19 and earlier:
21               _BSD_SOURCE
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DESCRIPTION

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

35       On  success,  zero is returned.  On error, -1 is returned, and errno is
36       set appropriately.
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ERRORS

39       Errors  are  as  for  utimes(2),  with  the  following  additions   for
40       futimes():
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42       EBADF  fd is not a valid file descriptor.
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44       ENOSYS The /proc filesystem could not be accessed.
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46       The following additional error may occur for lutimes():
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48       ENOSYS The  kernel does not support this call; Linux 2.6.22 or later is
49              required.
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VERSIONS

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

57       For  an  explanation  of  the  terms  used   in   this   section,   see
58       attributes(7).
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60       ┌─────────────────────┬───────────────┬─────────┐
61       │Interface            │ Attribute     │ Value   │
62       ├─────────────────────┼───────────────┼─────────┤
63       │futimes(), lutimes() │ Thread safety │ MT-Safe │
64       └─────────────────────┴───────────────┴─────────┘

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 4.15 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                             2017-09-15                        FUTIMES(3)
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