source: trunk/minix/lib/sysutil/env_prefix.c@ 10

#include "sysutil.h"
#include <stdlib.h>
#include <string.h>

/*=========================================================================*
 *                              env_prefix                                 *
 *=========================================================================*/
PUBLIC int env_prefix(env, prefix)
char *env;              /* environment variable to inspect */
char *prefix;           /* prefix to test for */
{
/* An environment setting may be prefixed by a word, usually "pci".  
 * Return TRUE if a given prefix is used.
 */
  char value[EP_BUF_SIZE];
  char punct[] = ":,;.";
  int i, s, keylen;
  char *val;
  size_t n;

  if ((s = env_get_param(env, value, sizeof(value))) != 0) {
        if (s != ESRCH)         /* only error allowed */
        printf("WARNING: get_mon_param() failed in env_prefix(): %d\n", s);     
  }
  n = strlen(prefix);
  return(value != NULL
        && strncmp(value, prefix, n) == 0
        && strchr(punct, value[n]) != NULL);
}