sys/src/boot/alphapc/conf.c

   1 #include        "u.h"
   2 #include        "mem.h"
   3 #include        "dat.h"
   4 #include        "fns.h"
   5 #include        "lib.h"
   6
   7 static char *confname[MAXCONF];
   8 static char *confval[MAXCONF];
   9 static int nconf;
  10 static char bootargs[BOOTARGSLEN];
  11
  12 char*
  13 getconf(char *name)
  14 {
  15         int i;
  16
  17         for(i = 0; i < nconf; i++)
  18                 if(strcmp(confname[i], name) == 0)
  19                         return confval[i];
  20         return 0;
  21 }
  22
  23 void
  24 setconf(char *buf)
  25 {
  26         char *cp, *line[MAXCONF];
  27         int i, n;
  28
  29         /*
  30          * Keep a pristine copy.
  31          * Should change this to pass the parsed strings
  32          * to the booted programme instead of the raw
  33          * string, then it only gets done once.
  34          */
  35         strcpy(bootargs, buf);
  36         /* print("boot: stashing /alpha/conf boot args at 0x%lux\n",
  37                 bootargs);                      /* DEBUG */
  38         conf.bootargs = bootargs;
  39
  40         n = getcfields(buf, line, MAXCONF, "\n");
  41         for(i = 0; i < n; i++){
  42                 if(*line[i] == '#')
  43                         continue;
  44                 cp = strchr(line[i], '=');
  45                 if(cp == nil)
  46                         continue;
  47                 *cp++ = 0;
  48                 if(cp - line[i] >= NAMELEN+1)
  49                         *(line[i]+NAMELEN-1) = 0;
  50                 confname[nconf] = line[i];
  51                 confval[nconf] = cp;
  52                 nconf++;
  53         }
  54 }
  55
  56 int
  57 getcfields(char* lp, char** fields, int n, char* sep)
  58 {
  59         int i;
  60
  61         for(i = 0; lp && *lp && i < n; i++){
  62                 while(*lp && strchr(sep, *lp) != 0)
  63                         *lp++ = 0;
  64                 if(*lp == 0)
  65                         break;
  66                 fields[i] = lp;
  67                 while(*lp && strchr(sep, *lp) == 0){
  68                         if(*lp == '\\' && *(lp+1) == '\n')
  69                                 *lp++ = ' ';
  70                         lp++;
  71                 }
  72         }
  73
  74         return i;
  75 }