compilers/pcc/pcc-libs-1.0.0/libI77/endfile.c

   1 /*      $Id: endfile.c,v 1.4 2008/05/04 10:38:33 ragge Exp $    */
   2 /*
   3  * Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * Redistributions of source code and documentation must retain the above
  10  * copyright notice, this list of conditions and the following disclaimer.
  11  * Redistributions in binary form must reproduce the above copyright
  12  * notice, this list of conditionsand the following disclaimer in the
  13  * documentation and/or other materials provided with the distribution.
  14  * All advertising materials mentioning features or use of this software
  15  * must display the following acknowledgement:
  16  *      This product includes software developed or owned by Caldera
  17  *      International, Inc.
  18  * Neither the name of Caldera International, Inc. nor the names of other
  19  * contributors may be used to endorse or promote products derived from
  20  * this software without specific prior written permission.
  21  *
  22  * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
  23  * INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
  24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  25  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  26  * DISCLAIMED.  IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OFLIABILITY, WHETHER IN CONTRACT,
  31  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  32  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  */
  35 #include <sys/wait.h>
  36
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <unistd.h>
  40
  41 #include "fio.h"
  42 static alist *ax;
  43
  44 int
  45 f_end(alist *a)
  46 {
  47         unit *b;
  48         if(a->aunit>=MXUNIT || a->aunit<0) err(a->aerr,101,"endfile");
  49         b = &units[a->aunit];
  50         if(b->ufd==NULL) return(0);
  51         b->uend=1;
  52         if( b->useek==0) return(0);
  53         ax=a;
  54         if(b->uwrt) nowreading(b);
  55         return(t_runc(b));
  56 }
  57
  58 int
  59 t_runc(unit *b)
  60 {
  61         char buf[128],nm[16];
  62         FILE *tmp;
  63         int n,m, fd;
  64         long loc,len;
  65
  66         if(b->url) return(0);   /*don't truncate direct files*/
  67         loc=ftell(b->ufd);
  68         fseek(b->ufd,0L,2);
  69         len=ftell(b->ufd);
  70         if(loc==len || b->useek==0 || b->ufnm==NULL) return(0);
  71         strcpy(nm,"tmp.FXXXXXX");
  72         if(b->uwrt) nowreading(b);
  73         fd = mkstemp(nm);
  74         tmp=fdopen(fd,"w");
  75         fseek(b->ufd,0L,0);
  76         for(;loc>0;)
  77         {
  78                 n=fread(buf,1,loc>128?128:(int)loc,b->ufd);
  79                 if(n>loc) n=loc;
  80                 loc -= n;
  81                 fwrite(buf,1,n,tmp);
  82         }
  83         fflush(tmp);
  84         for(n=0;n<10;n++)
  85         {
  86                 if((m=fork())==-1) continue;
  87                 else if(m==0)
  88                 {
  89                         execl("/bin/cp","cp",nm,b->ufnm,NULL);
  90                         execl("/usr/bin/cp","cp",nm,b->ufnm,NULL);
  91                         fprintf(stdout,"no cp\n");
  92                         exit(1);
  93                 }
  94                 wait(&m);
  95                 if(m!=0) err(ax->aerr,111,"endfile");
  96                 fclose(tmp);
  97                 unlink(nm);
  98                 return(0);
  99         }
 100         err(ax->aerr,111,"endfile");
 101 }