/* $Header: ndir.c,v 4.3.1.3 85/05/23 11:19:24 lwall Exp $ * * $Log: ndir.c,v $ * Revision 4.3.1.3 85/05/23 11:19:24 lwall * Oops, shouldn't have included sys/types.h again. * * Revision 4.3.1.2 85/05/15 14:46:00 lwall * Changed short to ino_t, which may be ushort on some systems. * * Revision 4.3.1.1 85/05/10 11:35:34 lwall * Branch for patches. * * Revision 4.3 85/05/01 11:42:55 lwall * Baseline for release with 4.3bsd. * */ #include "EXTERN.h" #include "common.h" #include "INTERN.h" #include "ndir.h" #ifdef USENDIR /* * support for Berkeley directory reading routine on a V7 file system */ /* * open a directory. */ DIR * opendir(name) char *name; { register DIR *dirp; register int fd; char *malloc(); if ((fd = open(name, 0)) == -1) return NULL; if ((dirp = (DIR *)malloc(sizeof(DIR))) == NULL) { close (fd); return NULL; } dirp->dd_fd = fd; dirp->dd_loc = 0; return dirp; } /* * read an old style directory entry and present it as a new one */ #ifndef pyr #define ODIRSIZ 14 struct olddirect { ino_t od_ino; char od_name[ODIRSIZ]; }; #else an Pyramid in the ATT universe #define ODIRSIZ 248 struct olddirect { long od_ino; short od_fill1, od_fill2; char od_name[ODIRSIZ]; }; #endif /* * get next entry in a directory. */ struct direct * readdir(dirp) register DIR *dirp; { register struct olddirect *dp; static struct direct dir; for (;;) { if (dirp->dd_loc == 0) { dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf, DIRBLKSIZ); if (dirp->dd_size <= 0) return NULL; } if (dirp->dd_loc >= dirp->dd_size) { dirp->dd_loc = 0; continue; } dp = (struct olddirect *)(dirp->dd_buf + dirp->dd_loc); dirp->dd_loc += sizeof(struct olddirect); if (dp->od_ino == 0) continue; dir.d_ino = dp->od_ino; strncpy(dir.d_name, dp->od_name, ODIRSIZ); dir.d_name[ODIRSIZ] = '\0'; /* insure null termination */ dir.d_namlen = strlen(dir.d_name); dir.d_reclen = DIRSIZ(&dir); return (&dir); } } /* * close a directory. */ void closedir(dirp) register DIR *dirp; { close(dirp->dd_fd); dirp->dd_fd = -1; dirp->dd_loc = 0; free(dirp); } #endif USENDIR