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130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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int
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DEFUN(main, (argc, argv), int argc AND char **argv)
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{
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static CONST char hello[] = "Hello, world.\n";
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static CONST char replace[] = "Hewwo, world.\n";
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static CONST size_t replace_from = 2, replace_to = 4;
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char filename[FILENAME_MAX];
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char *name = strrchr(*argv, '/');
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char buf[BUFSIZ];
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FILE *f;
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int lose = 0;
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if (name != NULL)
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++name;
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else
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name = *argv;
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(void) sprintf(filename, "/tmp/%s.test", name);
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f = fopen(filename, "w+");
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if (f == NULL)
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{
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perror(filename);
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exit(1);
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}
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(void) fputs(hello, f);
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rewind(f);
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(void) fgets(buf, sizeof(buf), f);
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rewind(f);
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(void) fputs(buf, f);
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rewind(f);
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{
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register size_t i;
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for (i = 0; i < replace_from; ++i)
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{
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int c = getc(f);
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if (c == EOF)
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{
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printf("EOF at %u.\n", i);
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lose = 1;
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break;
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}
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else if (c != hello[i])
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{
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printf("Got '%c' instead of '%c' at %u.\n",
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(unsigned char) c, hello[i], i);
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lose = 1;
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break;
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}
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}
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}
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{
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long int where = ftell(f);
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if (where == replace_from)
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{
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register size_t i;
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for (i = replace_from; i < replace_to; ++i)
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if (putc(replace[i], f) == EOF)
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{
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printf("putc('%c') got %s at %u.\n",
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replace[i], strerror(errno), i);
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lose = 1;
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break;
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}
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}
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else if (where == -1L)
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{
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printf("ftell got %s (should be at %u).\n",
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strerror(errno), replace_from);
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lose = 1;
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}
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else
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{
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printf("ftell returns %u; should be %u.\n", where, replace_from);
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lose = 1;
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}
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}
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if (!lose)
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{
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rewind(f);
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if (fgets(buf, sizeof(buf), f) == NULL)
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{
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printf("fgets got %s.\n", strerror(errno));
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lose = 1;
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}
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else if (strcmp(buf, replace))
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{
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printf("Read \"%s\" instead of \"%s\".\n", buf, replace);
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lose = 1;
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}
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}
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if (lose)
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printf("Test FAILED! Losing file is \"%s\".\n", filename);
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else
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{
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(void) remove(filename);
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puts("Test succeeded.");
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}
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exit(lose ? EXIT_FAILURE : EXIT_SUCCESS);
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}
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