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GETMNTINFO(3)	      DragonFly Library Functions Manual	 GETMNTINFO(3)


getmntinfo, getmntvinfo -- get information about mounted file systems


Standard C Library (libc, -lc)


#include <sys/param.h> #include <sys/ucred.h> #include <sys/mount.h> int getmntinfo(struct statfs **mntbufp, int flags); int getmntvinfo(struct statfs **mntbufp, struct statvfs **mntvbufp, int flags);


The getmntinfo() function returns an array of statfs() structures describing each currently mounted file system (see statfs(2)). The getmntinfo() function passes its flags argument transparently to getfsstat(2). The getmntvinfo() function returns an array of statfs and statvfs struc- tures describing each currently mounted file system (see statfs(2)), and otherwise works like getmntinfo().


On successful completion, getmntinfo() returns a count of the number of elements in the array. The pointer to the array is stored into mntbufp. If an error occurs, zero is returned and the external variable errno is set to indicate the error. Although the pointer mntbufp will be unmodi- fied, any information previously returned by getmntinfo() will be lost. The getmntvinfo() function additionally stores the pointer to the statvfs array into mntvbufp.


The getmntinfo() and getmntvinfo() functions may fail and set errno for any of the errors specified for the library routines getfsstat(2), getvfsstat(2) or malloc(3).


getfsstat(2), getvfsstat(2), mount(2), statfs(2), mount(8)


The getmntinfo() function first appeared in 4.4BSD. The getmntvinfo() function first appeared in DragonFly 1.13.


The getmntinfo() and getmntvinfo() functions write the array of struc- tures to an internal static object and returns a pointer to that object. Subsequent calls to getmntinfo() or getmntvinfo() will modify the same object. The memory allocated by getmntinfo() or getmntvinfo() cannot be free(3)'d by the application. DragonFly 4.7 April 1, 2011 DragonFly 4.7

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