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64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/*
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** Ullrich von Bassewitz, 2012-05-30. Based on code by Groepaz.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include "dir.h"
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DIR* __fastcall__ opendir (register const char* name)
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{
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unsigned char buf[2];
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DIR* dir = 0;
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DIR d;
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/* Setup the actual file name that is sent to the disk. We accept "0:",
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** "1:" and "." as directory names.
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*/
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d.name[0] = '$';
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if (name == 0 || name[0] == '\0' || (name[0] == '.' && name[1] == '\0')) {
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d.name[1] = '\0';
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} else if ((name[0] == '0' || name[0] == '1') && name[1] == ':' && name[2] == '\0') {
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d.name[1] = name[0];
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d.name[2] = '\0';
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} else {
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errno = EINVAL;
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goto exitpoint;
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}
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/* Set the offset of the first entry */
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d.off = sizeof (buf);
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/* Open the directory on disk for reading */
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d.fd = open (d.name, O_RDONLY);
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if (d.fd >= 0) {
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/* Skip the load address */
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if (_dirread (&d, buf, sizeof (buf))) {
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/* Allocate memory for the DIR structure returned */
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dir = malloc (sizeof (*dir));
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/* Copy the contents of d */
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if (dir) {
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memcpy (dir, &d, sizeof (d));
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} else {
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/* Set an appropriate error code */
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errno = ENOMEM;
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}
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}
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}
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exitpoint:
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/* Done */
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return dir;
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}
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