3 /* _PDCLIB_rename( const char *, const char * )
5 This file is part of the Public Domain C Library (PDCLib).
6 Permission is granted to use, modify, and / or redistribute at will.
12 #include <_PDCLIB_glue.h>
14 #include </usr/include/errno.h>
16 extern int unlink( const char * pathname );
17 extern int link( const char * old, const char * new );
19 int _PDCLIB_rename( const char * old, const char * new )
21 /* Note that the behaviour if new file exists is implementation-defined.
22 There is nothing wrong with either overwriting it or failing the
23 operation, but you might want to document whichever you chose.
24 This example fails if new file exists.
26 if ( link( old, new ) == 0 )
28 if ( unlink( old ) == EOF )
46 #include <_PDCLIB_test.h>
56 /* check that neither file exists */
57 TESTCASE( fopen( testfile1, "r" ) == NULL );
58 TESTCASE( fopen( testfile2, "r" ) == NULL );
59 /* rename file 1 to file 2 - expected to fail */
60 TESTCASE( _PDCLIB_rename( testfile1, testfile2 ) == -1 );
62 TESTCASE( ( file = fopen( testfile1, "w" ) ) != NULL );
63 TESTCASE( fputc( 'x', file ) == 'x' );
64 TESTCASE( fclose( file ) == 0 );
65 /* check that file 1 exists */
66 TESTCASE( ( file = fopen( testfile1, "r" ) ) != NULL );
67 TESTCASE( fclose( file ) == 0 );
68 /* rename file 1 to file 2 */
69 TESTCASE( _PDCLIB_rename( testfile1, testfile2 ) == 0 );
70 /* check that file 2 exists, file 1 does not */
71 TESTCASE( fopen( testfile1, "r" ) == NULL );
72 TESTCASE( ( file = fopen( testfile2, "r" ) ) != NULL );
73 TESTCASE( fclose( file ) == 0 );
74 /* create another file 1 */
75 TESTCASE( ( file = fopen( testfile1, "w" ) ) != NULL );
76 TESTCASE( fputc( 'x', file ) == 'x' );
77 TESTCASE( fclose( file ) == 0 );
78 /* check that file 1 exists */
79 TESTCASE( ( file = fopen( testfile1, "r" ) ) != NULL );
80 TESTCASE( fclose( file ) == 0 );
81 /* rename file 1 to file 2 - expected to fail, see comment in
82 _PDCLIB_rename() itself.
84 TESTCASE( _PDCLIB_rename( testfile1, testfile2 ) == -1 );
85 /* remove both files */