gno/lib/libc/gen/hostname.c

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/*
* $Id: hostname.c,v 1.2 1997/09/21 06:05:00 gdr Exp $
*/
#ifdef __ORCAC__
segment "libc_gen__";
#endif
#include <sys/param.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <orca.h>
#include <locator.h>
#include <memory.h>
#include <misctool.h>
typedef struct NMRec {
word blockLen;
unsigned char nameLength;
char nameString[64];
} NMRec;
typedef union {
struct {
word messageID;
word createFlag;
} w;
unsigned long l;
} ResponseR;
int
sethostname(const char *name, int namelen) {
int size;
NMRec rec;
ResponseR mbnResp;
strcpy(rec.nameString, "Procyon~GNO/ME~HoStNaMe");
rec.nameLength = 23;
size = MIN(MAXHOSTNAMELEN-1, namelen);
strncpy(rec.nameString+23, name, size);
(rec.nameString+23)[size] = 0;
rec.blockLen = 2 + (1+23) + (1+size);
mbnResp.l = MessageByName(1,(Pointer)&rec);
if (_toolErr) {
errno = ENOMEM;
return -1;
}
return 0;
}
int
gethostname(char *name, int namelen) {
NMRec rec = {30,23,"Procyon~GNO/ME~HoStNaMe"}; /* why blockLen = 30? */
ResponseR mbnResp;
Handle message;
mbnResp.l = MessageByName(0,(Pointer)&rec);
if (_toolErr) {
errno = ENOENT;
return -1;
}
#if 0
printf("MBN returned %X %X\n", mbnResp.w.messageID,
mbnResp.w.createFlag);
#endif
MessageCenter(getMessage,mbnResp.w.messageID,
message = NewHandle(0l,userid(),0,0l));
if (_toolErr) {
errno = ENOMEM;
return -1;
}
strncpy(name, (char *)*message+6+2+(1+23),
MIN(MAXHOSTNAMELEN, namelen));
DisposeHandle(message);
return 0;
}