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来自「Algorithms for Image Processing and Comp」· 代码 · 共 21 行

@c ----------------------------------------------------------------------
@node hasmntopt, unix
@heading @code{hasmntopt}
@subheading Syntax

@example
#include <mntent.h>

char *hasmntopt(struct mntent *mnt, char *opt);
@end example

@subheading Description

This function is a no-op for MS-DOS, but is provided to assist in Unix
ports.  @xref{getmntent}

@subheading Return Value

This function always returns @code{NULL} to signify an error.