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Languguage OS 2
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Languguage OS II Version 10-94 (Knowledge Media)(1994).ISO
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gnu
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dirent.lha
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dirent
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readdir.c
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1990-09-13
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/*
readdir -- read next entry from a directory stream
last edit: 25-Apr-1987 D A Gwyn
*/
#ifdef unos
#include <errno.h>
#else
#include <sys/errno.h>
#endif
#include <sys/types.h>
#include <dirent.h>
extern int getdents(); /* SVR3 system call, or emulation */
extern int errno;
#ifndef NULL
#define NULL 0
#endif
struct dirent *
readdir( dirp )
register DIR *dirp; /* stream from opendir() */
{
register struct dirent *dp; /* -> directory data */
if ( dirp == NULL || dirp->dd_buf == NULL )
{
errno = EFAULT;
return NULL; /* invalid pointer */
}
do {
if ( dirp->dd_loc >= dirp->dd_size ) /* empty or obsolete */
dirp->dd_loc = dirp->dd_size = 0;
if ( dirp->dd_size == 0 /* need to refill buffer */
&& (dirp->dd_size =
getdents( dirp->dd_fd, dirp->dd_buf, (unsigned)DIRBUF )
) <= 0
)
return NULL; /* EOF or error */
dp = (struct dirent *)&dirp->dd_buf[dirp->dd_loc];
dirp->dd_loc += dp->d_reclen;
}
#ifdef unos
while ( dp->d_ino < (ino_t) 0 ); /* don't rely on getdents() */
#else
while ( dp->d_ino == (ino_t) 0 ); /* don't rely on getdents() */
#endif
return dp;
}