|FCHOWN(3P)||POSIX Programmer's Manual||FCHOWN(3P)|
int fchown(int fildes, uid_t owner, gid_t group);
- The fildes argument is not an open file descriptor.
- The effective user ID does not match the owner of the file or the process does not have appropriate privileges and _POSIX_CHOWN_RESTRICTED indicates that such privilege is required.
- The file referred to by fildes resides on a read-only file system.
The fchown() function may fail if:
- The owner or group ID is not a value supported by the implementation. The fildes argument refers to a pipe or socket or an fattach()-ed STREAM and the implementation disallows execution of fchown() on a pipe.
- A physical I/O error has occurred.
- The fchown() function was interrupted by a signal which was caught.
The following sections are informative.
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);
The Base Definitions volume of POSIX.1‐2008, <unistd.h>
Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .
|2013||IEEE/The Open Group|