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utime(2) [opensolaris man page]

utime(2)							   System Calls 							  utime(2)

NAME
utime - set file access and modification times SYNOPSIS
#include <sys/types.h> #include <utime.h> int utime(const char *path, const struct utimbuf *times); DESCRIPTION
The utime() function sets the access and modification times of the file pointed to by path, and causes the time of the last file status change (st_ctime) to be updated. If times is NULL, the access and modification times of the file are set to the current time. A process must be the owner of the file or have write permission to use utime() in this manner. If times is not NULL, times is interpreted as a pointer to a utimbuf structure (defined in <utime.h>) and the access and modification times are set to the values contained in the designated structure. Only the owner of the file or a process that has the {PRIV_FILE_OWNER} privi- lege asserted in its effective set can use utime() in this manner. The utimbuf structure contains the following members: time_t actime; /* access time */ time_t modtime; /* modification time */ The times contained in the members of the utimbuf structure are measured in seconds since 00:00:00 UTC, January 1, 1970. RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error. ERRORS
The utime() function will fail if: EACCES Search permission is denied by a component of the path prefix. EACCES The process does not have appropriate privileges and is not the owner of the file, write permission is denied for the file, and times is NULL. EFAULT The path argument points to an illegal address. EINTR A signal was caught during the execution of the utime() function. EIO An I/O error occurred while reading from or writing to the file system. ELOOP Too many symbolic links were encountered in translating path. ENAMETOOLONG The length of the path argument exceeds PATH_MAX, or the length of a path component exceeds NAME_MAX while _POSIX_NO_TRUNC is in effect. ENOENT The named file does not exist or is a null pathname. ENOLINK The path argument points to a remote machine and the link to that machine is no longer active. ENOTDIR A component of the path prefix is not a directory. EPERM The effective user of the calling process is not the owner of the file, {PRIV_FILE_OWNER} is not asserted in the effective set of the calling process, and times is not NULL. EROFS The file system containing the file is mounted read-only. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO
stat(2), utimes(2), attributes(5), privileges(5), standards(5) SunOS 5.11 19 Apr 2004 utime(2)

Check Out this Related Man Page

UTIME(P)						     POSIX Programmer's Manual							  UTIME(P)

NAME
utime - set file access and modification times SYNOPSIS
#include <utime.h> int utime(const char *path, const struct utimbuf *times); DESCRIPTION
The utime() function shall set the access and modification times of the file named by the path argument. If times is a null pointer, the access and modification times of the file shall be set to the current time. The effective user ID of the process shall match the owner of the file, or the process has write permission to the file or has appropriate privileges, to use utime() in this manner. If times is not a null pointer, times shall be interpreted as a pointer to a utimbuf structure and the access and modification times shall be set to the values contained in the designated structure. Only a process with the effective user ID equal to the user ID of the file or a process with appropriate privileges may use utime() this way. The utimbuf structure is defined in the <utime.h> header. The times in the structure utimbuf are measured in seconds since the Epoch. Upon successful completion, utime() shall mark the time of the last file status change, st_ctime, to be updated; see <sys/stat.h>. RETURN VALUE
Upon successful completion, 0 shall be returned. Otherwise, -1 shall be returned and errno shall be set to indicate the error, and the file times shall not be affected. ERRORS
The utime() function shall fail if: EACCES Search permission is denied by a component of the path prefix; or the times argument is a null pointer and the effective user ID of the process does not match the owner of the file, the process does not have write permission for the file, and the process does not have appropriate privileges. ELOOP A loop exists in symbolic links encountered during resolution of the path argument. ENAMETOOLONG The length of the path argument exceeds {PATH_MAX} or a pathname component is longer than {NAME_MAX}. ENOENT A component of path does not name an existing file or path is an empty string. ENOTDIR A component of the path prefix is not a directory. EPERM The times argument is not a null pointer and the calling process' effective user ID does not match the owner of the file and the calling process does not have the appropriate privileges. EROFS The file system containing the file is read-only. The utime() function may fail if: ELOOP More than {SYMLOOP_MAX} symbolic links were encountered during resolution of the path argument. ENAMETOOLONG As a result of encountering a symbolic link in resolution of the path argument, the length of the substituted pathname string exceeded {PATH_MAX}. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
None. RATIONALE
The actime structure member must be present so that an application may set it, even though an implementation may ignore it and not change the access time on the file. If an application intends to leave one of the times of a file unchanged while changing the other, it should use stat() to retrieve the file's st_atime and st_mtime parameters, set actime and modtime in the buffer, and change one of them before making the utime() call. FUTURE DIRECTIONS
None. SEE ALSO
The Base Definitions volume of IEEE Std 1003.1-2001, <sys/stat.h>, <utime.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 UTIME(P)
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