Проект OpenNet: MAN setmode (3) Библиотечные вызовы (FreeBSD и Linux)

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setmode (3)

>> setmode (3) ( FreeBSD man: Библиотечные вызовы )

BSD mandoc

NAME



getmode

 
setmode

 - modify mode bits

LIBRARY

Lb libc

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 Fa mode as altered by the values pointed to by Fa 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 values 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 modify future file modes correctly.

If the mode passed to setmode ();
is invalid or if memory cannot be allocated 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, generally after a call to getmode (.);