11-08-2012
Finding the Group Owner Name
Hi all,
How can i find the group owner name...???
Thanks
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Hi
How about finding out all objects
1. owned by a particular owner /
2. or accessed by group id
Thanks in advance
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FCHOWN(3P) POSIX Programmer's Manual FCHOWN(3P)
PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond-
ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
NAME
fchown - change owner and group of a file
SYNOPSIS
#include <unistd.h>
int fchown(int fildes, uid_t owner, gid_t group);
DESCRIPTION
The fchown() function shall be equivalent to chown() except that the file whose owner and group are changed is specified by the file
descriptor fildes.
RETURN VALUE
Upon successful completion, fchown() shall return 0. Otherwise, it shall return -1 and set errno to indicate the error.
ERRORS
The fchown() function shall fail if:
EBADF The fildes argument is not an open file descriptor.
EPERM The effective user ID does not match the owner of the file or the process does not have appropriate privilege and
_POSIX_CHOWN_RESTRICTED indicates that such privilege is required.
EROFS The file referred to by fildes resides on a read-only file system.
The fchown() function may fail if:
EINVAL The owner or group ID is not a value supported by the implementation. The fildes argument refers to a pipe or socket or an fat-
tach()-ed STREAM and the implementation disallows execution of fchown() on a pipe.
EIO A physical I/O error has occurred.
EINTR The fchown() function was interrupted by a signal which was caught.
The following sections are informative.
EXAMPLES
Changing the Current Owner of a File
The following example shows how to change the owner of a file named /home/cnd/mod1 to "jones" and the group to "cnd".
The numeric value for the user ID is obtained by extracting the user ID from the user database entry associated with "jones". Similarly,
the numeric value for the group ID is obtained by extracting the group ID from the group database entry associated with "cnd". This example
assumes the calling program has appropriate privileges.
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <pwd.h>
#include <grp.h>
struct passwd *pwd;
struct group *grp;
int fildes;
...
fildes = open("/home/cnd/mod1", O_RDWR);
pwd = getpwnam("jones");
grp = getgrnam("cnd");
fchown(fildes, pwd->pw_uid, grp->gr_gid);
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
chown(), the Base Definitions volume of IEEE Std 1003.1-2001, <unistd.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 FCHOWN(3P)