94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
#include "sysutil.h"
|
|
#include <string.h>
|
|
|
|
int env_argc = 0;
|
|
char **env_argv = NULL;
|
|
|
|
static char *find_key(const char *params, const char *key);
|
|
|
|
/*===========================================================================*
|
|
* env_setargs *
|
|
*===========================================================================*/
|
|
void env_setargs(int arg_c, char *arg_v[])
|
|
{
|
|
env_argc= arg_c;
|
|
env_argv= arg_v;
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* env_get_param *
|
|
*===========================================================================*/
|
|
int env_get_param(const char *key, char *value, int max_len)
|
|
{
|
|
message m;
|
|
static char mon_params[MULTIBOOT_PARAM_BUF_SIZE]; /* copy parameters here */
|
|
char *key_value;
|
|
int i, s;
|
|
size_t keylen;
|
|
|
|
if (key == NULL)
|
|
return EINVAL;
|
|
|
|
keylen= strlen(key);
|
|
for (i= 1; i<env_argc; i++)
|
|
{
|
|
if (strncmp(env_argv[i], key, keylen) != 0)
|
|
continue;
|
|
if (strlen(env_argv[i]) <= keylen)
|
|
continue;
|
|
if (env_argv[i][keylen] != '=')
|
|
continue;
|
|
key_value= env_argv[i]+keylen+1;
|
|
if (strlen(key_value)+1 > (size_t) max_len)
|
|
return(E2BIG);
|
|
strcpy(value, key_value);
|
|
return OK;
|
|
}
|
|
|
|
/* Get copy of boot monitor parameters. */
|
|
m.m_type = SYS_GETINFO;
|
|
m.m_lsys_krn_sys_getinfo.request = GET_MONPARAMS;
|
|
m.m_lsys_krn_sys_getinfo.endpt = SELF;
|
|
m.m_lsys_krn_sys_getinfo.val_len = sizeof(mon_params);
|
|
m.m_lsys_krn_sys_getinfo.val_ptr = mon_params;
|
|
if ((s=_kernel_call(SYS_GETINFO, &m)) != OK) {
|
|
printf("SYS_GETINFO: %d (size %u)\n", s, sizeof(mon_params));
|
|
return(s);
|
|
}
|
|
|
|
/* We got a copy, now search requested key. */
|
|
if ((key_value = find_key(mon_params, key)) == NULL)
|
|
return(ESRCH);
|
|
|
|
/* Value found, see if it fits in the client's buffer. Callers assume that
|
|
* their buffer is unchanged on error, so don't make a partial copy.
|
|
*/
|
|
if ((strlen(key_value)+1) > (size_t) max_len) return(E2BIG);
|
|
|
|
/* Make the actual copy. */
|
|
strcpy(value, key_value);
|
|
|
|
return(OK);
|
|
}
|
|
|
|
|
|
/*==========================================================================*
|
|
* find_key *
|
|
*==========================================================================*/
|
|
static char *find_key(const char *params, const char *name)
|
|
{
|
|
const char *namep;
|
|
char *envp;
|
|
|
|
for (envp = (char *) params; *envp != 0;) {
|
|
for (namep = name; *namep != 0 && *namep == *envp; namep++, envp++)
|
|
;
|
|
if (*namep == '\0' && *envp == '=')
|
|
return(envp + 1);
|
|
while (*envp++ != 0)
|
|
;
|
|
}
|
|
return(NULL);
|
|
}
|
|
|