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/* sysenv 1.0 - request system boot parameter Author: Kees J. Bot
* 23 Dec 2000
*/
#define nil ((void*)0)
#include <minix/type.h>
#include <sys/types.h>
#include <sys/svrctl.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#define NIL ((char*)0)
static void tell(int fd, ...)
{
va_list ap;
char *s;
va_start(ap, fd);
while ((s= va_arg(ap, char *)) != NIL) {
(void) write(fd, s, strlen(s));
}
va_end(ap);
}
int main(int argc, char **argv)
{
struct sysgetenv sysgetenv;
int i;
int ex= 0;
char *e;
char val[1024];
i= 1;
while (i < argc && argv[i][0] == '-') {
char *opt= argv[i++]+1;
if (opt[0] == '-' && opt[1] == 0) break; /* -- */
if (*opt != 0) {
tell(2, "Usage: sysenv [name ...]\n", NIL);
exit(1);
}
}
do {
if (i < argc) {
sysgetenv.key= argv[i];
sysgetenv.keylen= strlen(sysgetenv.key) + 1;
} else {
sysgetenv.key= nil;
sysgetenv.keylen= 0;
}
sysgetenv.val= val;
sysgetenv.vallen= sizeof(val);
if (svrctl(PMGETPARAM, &sysgetenv) == -1) {
if (errno == ESRCH) {
ex |= 2;
} else {
ex |= 1;
tell(2, "sysenv: ", strerror(errno), "\n", NIL);
}
continue;
}
e= sysgetenv.val;
do {
e += strlen(e);
*e++ = '\n';
} while (i == argc && *e != 0);
if (write(1, sysgetenv.val, e - sysgetenv.val) < 0) {
ex |= 1;
tell(2, "sysenv: ", strerror(errno), "\n", NIL);
}
} while (++i < argc);
return ex;
}
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