NAME

scandir, alphasort - scan a directory

SYNOPSIS

/usr/ucb/cc [ flag . . . ] file . . .

#include <sys/types.h>
#include <sys/dir.h>

int scandir(dirname, namelist , select, dcomp)

char * dirname;
struct direct * (* namelist[ ]);
int (* select)(. ), (* dcomp)( );

int alphasort( d1, d2)

struct direct ** d1, ** d2;

DESCRIPTION

scandir( ) reads the directory dirname and builds an array of pointers to directory entries using malloc(3C). The second parameter is a pointer to an array of structure pointers. The third parameter is a pointer to a routine which is called with a pointer to a directory entry and should return a non zero value if the directory entry should be included in the array. If this pointer is NULL ,then all the directory entries will be included. The last argument is a pointer to a routine which is passed to qsort(3C), which sorts the completed array. If this pointer is NULL ,the array is not sorted. alphasort( ) is a routine that sorts the array alphabetically.

scandir( ) returns the number of entries in the array and a pointer to the array through the parameter namelist.

RETURN VALUES

Returns -1 if the directory cannot be opened for reading or if malloc(3C) cannot allocate enough memory to hold all the data structures.

SEE ALSO

getdents(2), directory(3C), malloc(3C), qsort(3C)

NOTES

Use of these interfaces should be restricted to only applications written on BSD platforms. Use of these interfaces with any of the system libraries or in multi-thread applications is unsupported.