1 /* Copyright (C) 1991, 1992, 1996, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
26 main (int argc, char **argv)
28 static const char hello[] = "Hello, world.\n";
29 static const char replace[] = "Hewwo, world.\n";
30 static const size_t replace_from = 2, replace_to = 4;
31 char filename[FILENAME_MAX];
32 char *name = strrchr (*argv, '/');
42 (void) sprintf (filename, "/tmp/%s.test", name);
44 f = fopen (filename, "w+");
51 (void) fputs (hello, f);
53 (void) fgets (buf, sizeof (buf), f);
55 (void) fputs (buf, f);
59 for (i = 0; i < replace_from; ++i)
64 printf ("EOF at %u.\n", i);
68 else if (c != hello[i])
70 printf ("Got '%c' instead of '%c' at %u.\n",
71 (unsigned char) c, hello[i], i);
79 long int where = ftell (f);
80 if (where == (long int) replace_from)
83 for (i = replace_from; i < replace_to; ++i)
84 if (putc(replace[i], f) == EOF)
86 printf ("putc('%c') got %s at %u.\n",
87 replace[i], strerror (errno), i);
92 else if (where == -1L)
94 printf ("ftell got %s (should be at %u).\n",
95 strerror (errno), replace_from);
100 printf ("ftell returns %lu; should be %u.\n", where, replace_from);
108 if (fgets (buf, sizeof (buf), f) == NULL)
110 printf ("fgets got %s.\n", strerror(errno));
113 else if (strcmp (buf, replace))
115 printf ("Read \"%s\" instead of \"%s\".\n", buf, replace);
121 printf ("Test FAILED! Losing file is \"%s\".\n", filename);
124 (void) remove (filename);
125 puts ("Test succeeded.");
128 exit (lose ? EXIT_FAILURE : EXIT_SUCCESS);