42 lines
1.1 KiB
C
Executable File
42 lines
1.1 KiB
C
Executable File
#pragma ident "@(#)readdir.c 1.4 92/07/20 SMI"
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#include <sys/param.h>
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#include <dirent.h>
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/*
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* get next entry in a directory.
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*/
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struct dirent *
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readdir(dirp)
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register DIR *dirp;
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{
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register struct dirent *dp;
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int saveloc = 0;
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next:
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if (dirp->dd_size != 0) {
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dp = (struct dirent *)&dirp->dd_buf[dirp->dd_loc];
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saveloc = dirp->dd_loc; /* save for possible EOF */
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dirp->dd_loc += dp->d_reclen;
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}
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if (dirp->dd_loc >= dirp->dd_size)
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dirp->dd_loc = dirp->dd_size = 0;
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if (dirp->dd_size == 0 /* refill buffer */
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&& (dirp->dd_size = getdents(dirp->dd_fd, dirp->dd_buf, dirp->dd_bsize)
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) <= 0
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) {
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if (dirp->dd_size == 0) /* This means EOF */
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dirp->dd_loc = saveloc; /* EOF so save for telldir */
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return (NULL); /* error or EOF */
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}
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dp = (struct dirent *)&dirp->dd_buf[dirp->dd_loc];
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if (dp->d_reclen <= 0)
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return (NULL);
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if (dp->d_fileno == 0)
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goto next;
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dirp->dd_off = dp->d_off;
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return(dp);
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}
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