Mercurial > gnulib
view tests/test-fwriting.c @ 17363:5a51fb7777a9
sys_select, sys_time: port 2013-01-30 Solaris 2.6 fix to Cygwin
Problem reported by Marco Atzeri in
<http://lists.gnu.org/archive/html/bug-gnulib/2013-03/msg00000.html>.
* lib/sys_select.in.h [HAVE_SYS_SELECT_H && _CYGWIN_SYS_TIME_H]:
Simply delegate to the system <sys/select.h> in this case too.
Also, pay attention to _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H only
if OSF/1, since otherwise Cygwin breaks, and it doesn't seem to
be needed on Solaris either.
* lib/sys_time.in.h [_CYGWIN_SYS_TIME_H]:
Simply delgate to the system <sys/time.h> in this case.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Tue, 19 Mar 2013 09:08:47 -0700 |
parents | e542fd46ad6f |
children | 344018b6e5d7 |
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/* Test of fwriting() function. Copyright (C) 2007-2013 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* Written by Bruno Haible <bruno@clisp.org>, 2007. */ #include <config.h> /* None of the files accessed by this test are large, so disable the fseek link warning if we are not using the gnulib fseek module. */ #define _GL_NO_LARGE_FILES #include "fwriting.h" #include <stdio.h> #include "macros.h" #define TESTFILE "t-fwriting.tmp" int main () { FILE *fp; /* Create a file with some contents. Write-only file is always writing. */ fp = fopen (TESTFILE, "w"); if (fp == NULL) goto skip; ASSERT (fwriting (fp)); if (fwrite ("foobarsh", 1, 8, fp) < 8) goto skip; ASSERT (fwriting (fp)); if (fclose (fp)) goto skip; /* Open it in read-only mode. Read-only file is never writing. */ fp = fopen (TESTFILE, "r"); if (fp == NULL) goto skip; ASSERT (!fwriting (fp)); if (fgetc (fp) != 'f') goto skip; ASSERT (!fwriting (fp)); if (fseek (fp, 2, SEEK_CUR)) goto skip; ASSERT (!fwriting (fp)); if (fgetc (fp) != 'b') goto skip; ASSERT (!fwriting (fp)); fflush (fp); ASSERT (!fwriting (fp)); if (fgetc (fp) != 'a') goto skip; ASSERT (!fwriting (fp)); if (fseek (fp, 0, SEEK_END)) goto skip; ASSERT (!fwriting (fp)); if (fclose (fp)) goto skip; /* Open it in read-write mode. POSIX requires a reposition (fseek, fsetpos, rewind) or fflush when transitioning from write to read, fwriting is only deterministic after input or output, but this test case should be portable even on open, after reposition, and after fflush. */ /* First a scenario with only fgetc, fseek, fputc. */ fp = fopen (TESTFILE, "r+"); if (fp == NULL) goto skip; ASSERT (!fwriting (fp)); if (fgetc (fp) != 'f') goto skip; ASSERT (!fwriting (fp)); if (fseek (fp, 2, SEEK_CUR)) goto skip; ASSERT (!fwriting (fp)); if (fgetc (fp) != 'b') goto skip; ASSERT (!fwriting (fp)); /* This fseek call is necessary when switching from reading to writing. See the description of fopen(), ISO C 99 7.19.5.3.(6). */ if (fseek (fp, 0, SEEK_CUR) != 0) goto skip; ASSERT (!fwriting (fp)); if (fputc ('x', fp) != 'x') goto skip; ASSERT (fwriting (fp)); if (fseek (fp, 0, SEEK_END)) goto skip; /* freading (fp) is undefined here, because on some implementations (e.g. glibc) fseek causes a buffer to be read. fwriting (fp) is undefined as well. */ if (fclose (fp)) goto skip; /* Open it in read-write mode. POSIX requires a reposition (fseek, fsetpos, rewind) or fflush when transitioning from write to read, fwriting is only deterministic after input or output, but this test case should be portable even on open, after reposition, and after fflush. */ /* Here a scenario that includes fflush. */ fp = fopen (TESTFILE, "r+"); if (fp == NULL) goto skip; ASSERT (!fwriting (fp)); if (fgetc (fp) != 'f') goto skip; ASSERT (!fwriting (fp)); if (fseek (fp, 2, SEEK_CUR)) goto skip; ASSERT (!fwriting (fp)); if (fgetc (fp) != 'b') goto skip; ASSERT (!fwriting (fp)); fflush (fp); ASSERT (!fwriting (fp)); if (fgetc (fp) != 'x') goto skip; ASSERT (!fwriting (fp)); /* This fseek call is necessary when switching from reading to writing. See the description of fopen(), ISO C 99 7.19.5.3.(6). */ if (fseek (fp, 0, SEEK_CUR) != 0) goto skip; ASSERT (!fwriting (fp)); if (fputc ('z', fp) != 'z') goto skip; ASSERT (fwriting (fp)); if (fseek (fp, 0, SEEK_END)) goto skip; /* freading (fp) is undefined here, because on some implementations (e.g. glibc) fseek causes a buffer to be read. fwriting (fp) is undefined as well. */ if (fclose (fp)) goto skip; /* Open it in append mode. */ fp = fopen (TESTFILE, "a"); if (fp == NULL) goto skip; ASSERT (fwriting (fp)); if (fwrite ("bla", 1, 3, fp) < 3) goto skip; ASSERT (fwriting (fp)); if (fclose (fp)) goto skip; return 0; skip: fprintf (stderr, "Skipping test: file operations failed.\n"); return 77; }