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terrno.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1999-2007 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                                                                      *
***********************************************************************/
#include    "sftest.h"

/* errnos tested for xopen-compliance */

MAIN()
{
      Sfio_t*     fw;
      Sfio_t*     fr;
      int   fds[2];
      int   lseek_errno;
      int   rv;

      if(!(fw = sfopen(NIL(Sfio_t*), tstfile(0), "w")) )
            terror("Can't create temp file %s to write", tstfile(0));
      if(!(fr = sfopen(NIL(Sfio_t*), tstfile(0), "r")) )
            terror("Can't open temp file %s to read", tstfile(0));

      sfseek(fr, (Sfoff_t)0, SEEK_END);
      if(sfgetc(fr) >= 0 || !sfeof(fr))
            terror("Should have seen eof");

      errno = 0;
      if((rv = sfwrite(fr, "a", 1)) == 1)
            terror("sfwrite returns %d, expecting 1", rv);
      if(errno != EBADF)
            twarn("Wrong errno %d after sfwrite(%d), expecting %d",errno,rv,EBADF);

      /* on some system (eg, apple), lseek does not set errno for this case */
      errno = 0;
      lseek(sffileno(fw), (off_t)(-2), SEEK_SET);
      lseek_errno = errno;
      lseek(sffileno(fw), (off_t)0, SEEK_SET);
      errno = 0;

      if(sfseek(fw, (Sfoff_t)(-2), SEEK_SET) != (Sfoff_t)(-1) )
            terror("sfseek should have failed");
      if(errno != lseek_errno)
            twarn("Wrong errno %d after sfseek, expecting %d", errno, lseek_errno);

      errno = 0;
      if(sfseek(fw, (Sfoff_t)0, SEEK_SET|SEEK_CUR|SEEK_END) >= 0)
            terror("sfseek should not have succeeded");
      if(errno != EINVAL)
            twarn("Wrong errno %d after sfseek, expecting %d", errno, EINVAL);

      if(pipe(fds) < 0)
            terror("Can't create pipes");

      if(!(fw = sfnew(fw, NIL(Void_t*), (size_t)SF_UNBOUND, fds[1], SF_WRITE)) )
            terror("Can't create stream for pipe");

      errno = 0;
      if(sfseek(fw, (Sfoff_t)0, SEEK_SET) >= 0)
            terror("sfseek should have failed on a pipe");
      if(errno != ESPIPE)
            twarn("Wrong errno %d after sfseek, expecting %d", ESPIPE);

      close(sffileno(fw));
      errno = 0;
      if(sfseek(fw, (Sfoff_t)0, SEEK_END) >= 0)
            terror("sfseek should have failed on a closed file descriptor");
      if(errno != EBADF)
            twarn("Wrong errno %d after sfseek, expecting %d", EBADF);

      TSTEXIT(0);
}

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