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futimes(3) Library Functions Manual futimes(3)
futimes, lutimes - change file timestamps
Standard C library (libc, -lc)
#include <sys/time.h> int futimes(int fd, const struct timeval tv[2]); int lutimes(const char *filename, const struct timeval tv[2]); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): futimes(), lutimes(): Since glibc 2.19: _DEFAULT_SOURCE glibc 2.19 and earlier: _BSD_SOURCE
futimes() changes the access and modification times of a file in the same way as utimes(2), with the difference that the file whose timestamps are to be changed is specified via a file descriptor, fd, rather than via a pathname. lutimes() changes the access and modification times of a file in the same way as utimes(2), with the difference that if filename refers to a symbolic link, then the link is not dereferenced: instead, the timestamps of the symbolic link are changed.
On success, zero is returned. On error, -1 is returned, and errno is set to indicate the error.
Errors are as for utimes(2), with the following additions for futimes(): EBADF fd is not a valid file descriptor. ENOSYS The /proc filesystem could not be accessed. The following additional error may occur for lutimes(): ENOSYS The kernel does not support this call; Linux 2.6.22 or later is required.
For an explanation of the terms used in this section, see attributes(7). ┌──────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────────────────────────────────┼───────────────┼─────────┤ │futimes(), lutimes() │ Thread safety │ MT-Safe │ └──────────────────────────────────────┴───────────────┴─────────┘
Linux, BSD.
futimes() glibc 2.3. lutimes() glibc 2.6.
lutimes() is implemented using the utimensat(2) system call.
utime(2), utimensat(2), symlink(7)
Linux man-pages 6.04 2023-03-30 futimes(3)
Pages that refer to this page: futimesat(2), utime(2), utimensat(2), timeval(3type), symlink(7)