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@(#)setmode.3 8.1 (Berkeley) 6/9/93
.Dd June 9, 1993 .Dt SETMODE 3 .Os .Sh NAME .Nm getmode , .Nm setmode .Nd modify mode bits .Sh SYNOPSIS .Fd #include <unistd.h> .Ft mode_t .Fn getmode "const void *set" "mode_t mode" .Ft void * .Fn setmode "const char *mode_str" .Sh DESCRIPTION The .Fn 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.
p The .Fn setmode function takes an absolute (octal) or symbolic value, as described in .Xr chmod 1 , as an argument and returns a pointer to mode values to be supplied to .Fn getmode . Because some of the symbolic values are relative to the file creation mask, .Fn setmode may call .Xr umask 2 . If this occurs, the file creation mask will be restored before .Fn setmode returns. If the calling program changes the value of its file creation mask after calling .Fn setmode , .Fn setmode must be called again if .Fn getmode is to modify future file modes correctly.
p If the mode passed to .Fn setmode is invalid, .Fn setmode returns .Dv NULL . .Sh ERRORS The .Fn setmode function may fail and set errno for any of the errors specified for the library routine .Xr malloc 3 . .Sh SEE ALSO .Xr chmod 1 , .Xr stat 2 , .Xr umask 2 , .Xr malloc 3 .Sh HISTORY The .Fn getmode and .Fn setmode functions first appeared in x 4.4 .