compilers/linux86-0.16.17/libc/error/error.c

   1 /* Copyright (C) 1996 Robert de Bath <robert@debath.thenet.co.uk>
   2  * This file is part of the Linux-8086 C library and is distributed
   3  * under the GNU Library General Public License.
   4  */
   5 #include <string.h>
   6
   7 char **__sys_errlist =0;
   8 int __sys_nerr = 0;
   9
  10 char *
  11 strerror(err)
  12 int err;
  13 {
  14    int fd;
  15    static char retbuf[80];
  16    char inbuf[256];
  17    int cc;
  18    int bufoff = 0;
  19
  20    if( __sys_nerr )
  21    {
  22       if( err < 0 || err >= __sys_nerr ) goto unknown;
  23       return __sys_errlist[err];
  24    }
  25
  26    if( err <= 0 ) goto unknown; /* NB the <= allows comments in the file */
  27    fd = open("/usr/lib/bcc/liberror.txt", 0);
  28    if (fd < 0) fd = open("/lib/liberror.txt", 0);
  29    if( fd < 0 ) goto unknown;
  30
  31    while( (cc=read(fd, inbuf, sizeof(inbuf))) > 0 )
  32    {
  33       int i;
  34       for(i=0; i<cc; i++)
  35       {
  36          if( inbuf[i] == '\n' )
  37          {
  38             retbuf[bufoff] = '\0';
  39             if( err == atoi(retbuf) )
  40             {
  41                char * p = strchr(retbuf, ' ');
  42                if( p == 0 ) goto unknown;
  43                while(*p == ' ') p++;
  44                close(fd);
  45                return p;
  46             }
  47             bufoff = 0;
  48          }
  49          else if( bufoff < sizeof(retbuf)-1 )
  50             retbuf[bufoff++] = inbuf[i];
  51       }
  52    }
  53 unknown:;
  54    if( fd >= 0 ) close(fd);
  55    strcpy(retbuf, "Unknown error ");
  56    strcpy(retbuf+14, itoa(err));
  57    return retbuf;
  58 }