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[unix-history] / usr / src / usr.sbin / config / main.c

/*
* main.c       1.4     81/03/09
* Config
*      Do system configuration for VAX/UNIX
*              1) Build system data structures
*              2) Build makefile
*              3) Create header files for devices
*      Michael Toy -- Berkeley -- 1981
*/

#include <stdio.h>
#include <ctype.h>
#include "y.tab.h"
#include "config.h"

main(argc, argv)
int argc;
char **argv;
{
   if (argc != 2)
   {
       fprintf(stderr, "usage: config <sysname>\n");
       exit(1);
   }
   PREFIX = argv[1];
   if (freopen(argv[1], "r", stdin) == NULL)
   {
       perror(argv[1]);
       exit(2);
   }
   dtab = NULL;
   if (yyparse())
       exit(3);
   else
   {
       ioconf();                       /* Print ioconf.c */
       ubglue();                       /* Create ubglue.s */
       makefile();                     /* build Makefile */
       headers();                      /* make a lot of .h files */
       printf("Don't forget to run \"make depend\"\n");
   }
}

/*
* get_word
*      returns EOF on end of file
*      NULL on end of line
*      pointer to the word otherwise
*/

char *get_word(fp)
register FILE *fp;
{
   static char line[80];
   register int ch;
   register char *cp;

   while((ch = getc(fp)) != EOF)
       if (ch != ' ' && ch != '\t')
           break;
   if (ch == EOF)
       return EOF;
   if (ch == '\n')
       return NULL;
   cp = line;
   *cp++ = ch;
   while((ch = getc(fp)) != EOF)
   {
       if (isspace(ch))
           break;
       *cp++ = ch;
   }
   *cp = '\0';
   if (ch == EOF)
       return EOF;
   ungetc(ch, fp);
   return line;
}

/*
* path:
*      Prepend the path to a filename
*/

path(file)
char *file;
{
   register char *cp;

   cp = malloc(strlen(PREFIX)+strlen(file)+5);
   strcpy(cp, "../");
   strcat(cp, PREFIX);
   strcat(cp, "/");
   strcat(cp, file);
   return cp;
}