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>
93 char filename1[] = "touch testfile1";
94 char filename2[] = "testfile2";
96 remove( filename1 + 6 );
98 /* check that neither file exists */
99 TESTCASE( fopen( filename1 + 6, "r" ) == NULL );
100 TESTCASE( fopen( filename2, "r" ) == NULL );
101 /* rename file 1 to file 2 - expected to fail */
102 TESTCASE( _PDCLIB_rename( filename1 + 6, filename2 ) == -1 );
105 /* check that file 1 exists */
106 TESTCASE( ( file = fopen( filename1 + 6, "r" ) ) != NULL );
107 TESTCASE( fclose( file ) == 0 );
108 /* rename file 1 to file 2 */
109 TESTCASE( _PDCLIB_rename( filename1 + 6, filename2 ) == 0 );
110 /* check that file 2 exists, file 1 does not */
111 TESTCASE( fopen( filename1 + 6, "r" ) == NULL );
112 TESTCASE( ( file = fopen( filename2, "r" ) ) != NULL );
113 TESTCASE( fclose( file ) == 0 );
114 /* create another file 1 */
116 /* check that file 1 exists */
117 TESTCASE( ( file = fopen( filename1 + 6, "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( filename1 + 6, filename2 ) == -1 );
123 /* remove both files */
124 remove( filename1 + 6 );
126 /* check that they're gone */
127 TESTCASE( fopen( filename1 + 6, "r" ) == NULL );
128 TESTCASE( fopen( filename2, "r" ) == NULL );