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