#include <mntent.h> char *hasmntopt(const struct mntent *mnt, const char *opt);
This function scans the mnt_opts
field of the mntent
structure mnt for a substring that matches opt.
See section getmntent.
This function returns the address of the substring if a match is found,
or NULL
otherwise.
not ANSI, not POSIX
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