47 lines
945 B
C
47 lines
945 B
C
#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/dir.h>
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/*
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* open a directory.
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*/
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DIR *opendir(name)
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char *name;
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{
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register DIR *dirp;
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register int fd;
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struct stat stbuf;
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extern char *malloc();
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if ((fd = open(name, 0)) == -1)
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return NULL;
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fstat(fd, &stbuf);
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if (((stbuf.st_mode & S_IFDIR) == 0) ||
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((dirp = (DIR *)malloc(sizeof (DIR))) == NULL)) {
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close (fd);
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return NULL;
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}
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if ((unsigned) stbuf.st_size == stbuf.st_size &&
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(dirp->dd_buf = malloc((unsigned) stbuf.st_size))) {
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dirp->dd_bsize = stbuf.st_size;
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read(fd, dirp->dd_buf, dirp->dd_bsize);
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close(fd);
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dirp->dd_fd = -2;
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dirp->dd_loc = 0;
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return dirp;
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}
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else if (dirp->dd_buf = malloc(8*DIRBLKSIZ)) {
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dirp->dd_bsize = 8 * DIRBLKSIZ;
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}
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else if (dirp->dd_buf = malloc(DIRBLKSIZ)) {
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dirp->dd_bsize = DIRBLKSIZ;
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}
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else {
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close(fd);
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free((char *) dirp);
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return NULL;
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}
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dirp->dd_fd = fd;
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dirp->dd_loc = -1;
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return dirp;
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}
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