minix/lib/utils/env_prefix.c
Jorrit Herder f2a85e58d9 Various updates.
* Removed some variants of the SYS_GETINFO calls from the kernel;
  replaced them with new PM and utils libary functionality. Fixed
  bugs in utils library that used old get_kenv() variant.
* Implemented a buffer in the kernel to gather random data.
  Memory driver periodically checks this for /dev/random.
  A better random algorithm can now be implemented in the driver.
  Removed SYS_RANDOM; the SYS_GETINFO call is used instead.
* Remove SYS_KMALLOC from the kernel. Memory allocation can now
  be done at the process manager with new 'other' library functions.
2005-06-03 13:55:06 +00:00

29 lines
860 B
C

#include "utils.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 s;
size_t n;
if ((s = get_mon_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);
}