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 )
43 _PDCLIB_errno = _PDCLIB_EIO;
46 _PDCLIB_errno = _PDCLIB_EUNKNOWN;
74 _PDCLIB_errno = _PDCLIB_EIO;
77 _PDCLIB_errno = _PDCLIB_EUNKNOWN;
87 #include <_PDCLIB_test.h>
96 /* check that neither file exists */
97 TESTCASE( fopen( testfile1, "r" ) == NULL );
98 TESTCASE( fopen( testfile2, "r" ) == NULL );
99 /* rename file 1 to file 2 - expected to fail */
100 TESTCASE( _PDCLIB_rename( testfile1, testfile2 ) == -1 );
102 TESTCASE( ( file = fopen( testfile1, "w" ) ) != NULL );
103 TESTCASE( fputc( 'x', file ) == 'x' );
104 TESTCASE( fclose( file ) == 0 );
105 /* check that file 1 exists */
106 TESTCASE( fopen( testfile1, "r" ) != NULL );
107 /* rename file 1 to file 2 */
108 TESTCASE( _PDCLIB_rename( testfile1, testfile2 ) == 0 );
109 /* check that file 2 exists, file 1 does not */
110 TESTCASE( fopen( testfile1, "r" ) == NULL );
111 TESTCASE( fopen( testfile2, "r" ) != NULL );
112 /* create another file 1 */
113 TESTCASE( ( file = fopen( testfile1, "w" ) ) != NULL );
114 TESTCASE( fputc( 'x', file ) == 'x' );
115 TESTCASE( fclose( file ) == 0 );
116 /* check that file 1 exists */
117 TESTCASE( ( file = fopen( testfile1, "r" ) ) != NULL );
118 TESTCASE( fclose( file ) == 0 );
119 /* rename file 1 to file 2 - expected to fail, see comment in
120 _PDCLIB_rename() itself.
122 TESTCASE( _PDCLIB_rename( testfile1, testfile2 ) == -1 );
123 /* remove both files */