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#include <grp.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <paths.h>
#include <string.h>
#include "parselib.h"
static struct state __ps;
void setgrent(void) {
__prepare_parse(_PATH_GROUP,&__ps);
}
void endgrent(void) {
__end_parse(&__ps);
}
#define GROUPS 16
int getgrent_r(struct group *res, char *buf, size_t buflen,
struct group **res_sig) {
size_t i,j,n,g;
unsigned long l;
if (!__ps.buffirst) setgrent();
if (!__ps.buffirst) goto error;
if (__ps.cur>=__ps.buflen) goto error;
res->gr_mem=(char**)buf;
again:
n=GROUPS*sizeof(char*); g=0;
for (i=0; i<4; ++i) {
char sep=i<3?':':',';
char found;
j=__parse_1(&__ps,sep);
if ((found=__ps.buffirst[__ps.cur+j])!=sep) {
if (found!='\n' || i!=3) {
parseerror:
while (__ps.cur+j<__ps.buflen) {
if (__ps.buffirst[__ps.cur+j]=='\n') {
__ps.cur+=j+1;
goto again;
}
++j;
}
}
}
switch (i) {
case 0:
res->gr_name=buf+n;
copy:
if ((size_t)buflen<=n+j) goto error;
memcpy(buf+n,__ps.buffirst+__ps.cur,j);
buf[n+j]=0;
n+=j+1;
if (found=='\n' && i==2) i=3;
break;
case 1: res->gr_passwd=buf+n; goto copy;
case 2:
if (scan_ulong(__ps.buffirst+__ps.cur,&l)!=j) goto parseerror;
res->gr_gid=l;
break;
case 3:
res->gr_mem[g]=buf+n;
++g;
if (g==(GROUPS-1)) break;
--i; /* again */
goto copy;
}
__ps.cur+=j+1;
}
res->gr_mem[g]=0;
*res_sig=res;
return 0;
error:
*res_sig=0;/* the glibc people should be taken behind the barn and shot */
return -1;
}
/* uucp:x:14:uucp,root */
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