DragonFly On-Line Manual Pages


SETMODE(3)	      DragonFly Library Functions Manual	    SETMODE(3)

NAME

getmode, setmode -- modify mode bits

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <unistd.h> mode_t getmode(const void *set, mode_t mode); void * setmode(const char *mode_str);

DESCRIPTION

The getmode() function returns a copy of the file permission bits mode as altered by the values pointed to by set. While only the mode bits are altered, other parts of the file mode may be examined. The setmode() function takes an absolute (octal) or symbolic value, as described in chmod(1), as an argument and returns a pointer to mode val- ues to be supplied to getmode(). Because some of the symbolic values are relative to the file creation mask, setmode() may call umask(2). If this occurs, the file creation mask will be restored before setmode() returns. If the calling program changes the value of its file creation mask after calling setmode(), setmode() must be called again if getmode() is to mod- ify future file modes correctly. If the mode passed to setmode() is invalid or if memory cannot be allo- cated for the return value, setmode() returns NULL. The value returned from setmode() is obtained from malloc() and should be returned to the system with free() when the program is done with it, gen- erally after a call to getmode().

ERRORS

The setmode() function may fail and set errno for any of the errors spec- ified for the library routine malloc(3).

SEE ALSO

chmod(1), stat(2), umask(2), malloc(3)

HISTORY

The getmode() and setmode() functions first appeared in 4.4BSD. DragonFly 3.7 April 28, 1995 DragonFly 3.7