fseek_test.c

1 #define _FILE_OFFSET_BITS 64
2 #include <stdio.h>
3 #include <stdlib.h>
4 #include <errno.h>
5 main()
6 {
7   FILE *fp ;
8   long long y ;
9   int retval ;
10   int result1 ;
11 #ifdef TEST_FSEEKO
12   off_t x ;
13   off_t result2 ;
14 #endif
15 #ifdef TEST_FSEEKO64
16   long long x ;
17   int result2 ;
18 #endif
19   fp = NULL ;
20   fp = fopen( "Makefile" , "r" ) ;
21 #ifdef TEST_FSEEKO
22   x = 0xffffffff ;
23   result1 = (sizeof(x) == 8) ;
24   result2 = fseeko( fp, x, SEEK_SET ) ;
25 #endif
26 #ifdef TEST_FSEEKO64
27   x = 0xffffffffL ;
28   result1 = (sizeof(x) == 8) ;
29   result2 = fseeko64( fp, x, SEEK_SET ) ;
30 #endif
31   if ( result2 ) perror("error") ;
32   fprintf(stdout,"pointer is 8 bytes: %s\n",result1?"true":"false") ;
33   fprintf(stdout,"seek returns correctly: %s\n",!result2?"true":"false") ;
34   if ( result1 && !result2 ) { 
35     fprintf(stdout,"status: OK\n") ; 
36     retval = 0 ;
37   } else { 
38     fprintf(stdout,"status: BUMMER\n") ;
39     retval = 1 ;
40   }
41   fclose(fp) ;
42   exit(retval) ;
43 }
44