compilers/linux86-0.16.17/libc/error/sys_errlist.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
   6 /* This is a flash way of auto-initing the error array from an external file
   7  * I wouldn't be surprised tho if it's a lot better just to hard code the
   8  * error messages into the array.
   9  *
  10  * Of course the best of all is to use strerror().
  11  */
  12
  13 #if defined(__AS386_16__) || defined(__AS386_32__)
  14 #define NR_ERRORS       128
  15
  16 extern char **__sys_errlist;
  17 extern int __sys_nerr;
  18
  19 char *sys_errlist[NR_ERRORS];
  20 int sys_nerr = NR_ERRORS;
  21
  22 #ifdef __AS386_16__
  23 #asm
  24   loc   1               ! Make sure the pointer is in the correct segment
  25 auto_func:              ! Label for bcc -M to work.
  26   .word _init_vars      ! Pointer to the autorun function
  27   .text                 ! So the function after is also in the correct seg.
  28 #endasm
  29 #else
  30 #asm
  31   loc   1               ! Make sure the pointer is in the correct segment
  32 auto_func:              ! Label for bcc -M to work.
  33   .long _init_vars      ! Pointer to the autorun function
  34   .text                 ! So the function after is also in the correct seg.
  35 #endasm
  36 #endif
  37
  38 static void init_vars()
  39 {
  40    char inbuf[256];
  41    char errbuf[80];
  42    int i, cc, fd, err, len, bufoff=0;
  43    char * ptr;
  44
  45    fd = open("/usr/lib/bcc/liberror.txt", 0);
  46    if (fd < 0) fd = open("/lib/liberror.txt", 0);
  47    if( fd < 0 ) return;
  48
  49    for(i=0; i<NR_ERRORS; i++) sys_errlist[i] = "Unknown error";
  50
  51    while( (cc=read(fd, inbuf, sizeof(inbuf))) > 0 )
  52    {
  53       for(i=0; i<cc; i++)
  54       {
  55          if( inbuf[i] == '\n' )
  56          {
  57             errbuf[bufoff] = '\0';
  58             err = atoi(errbuf);
  59             ptr = strchr(errbuf, ' ');
  60             if( ptr && err > 0 && err < NR_ERRORS )
  61             {
  62                while(*ptr == ' ') ptr++;
  63                len = strlen(ptr)+1;
  64                sys_errlist[err] = (void*)sbrk(len);
  65                if( (int)sys_errlist[err] == -1 )
  66                {
  67                   sys_errlist[err] == "";
  68                   break;
  69                }
  70                memcpy(sys_errlist[err], ptr, len);
  71             }
  72             bufoff = 0;
  73          }
  74          else if( bufoff < sizeof(errbuf)-1 )
  75             errbuf[bufoff++] = inbuf[i];
  76       }
  77    }
  78    close(fd);
  79
  80    __sys_errlist = sys_errlist;
  81    __sys_nerr = sys_nerr = NR_ERRORS;
  82 }
  83
  84 #endif /* __AS386_??__ */