Subversion Repositories planix.SVN

Rev

Rev 2 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 - 1 
#include <stdio.h>
2 
#include <grp.h>
3 
#include <stdlib.h>
4 
 
5 
#define	CL	':'
6 
#define	CM	','
7 
#define	NL	'\n'
8 
#define	MAXGRP	100
9 
 
10 
static char GROUP[] = "/etc/group";
11 
static FILE *grf = NULL;
12 
static char line[BUFSIZ+1];
13 
static struct group group;
14 
static char *gr_mem[MAXGRP];
15 
 
16 
void
17 
setgrent(void)
18 
{
19 
	if( !grf )
20 
		grf = fopen( GROUP, "r" );
21 
	else
22 
		rewind( grf );
23 
}
24 
 
25 
void
26 
endgrent(void)
27 
{
28 
	if( grf ){
29 
		fclose( grf );
30 
		grf = NULL;
31 
	}
32 
}
33 
 
34 
static char *
35 
grskip(register char *p, register c)
36 
{
37 
	while( *p && *p != c ) ++p;
38 
	if( *p ) *p++ = 0;
39 
	return( p );
40 
}
41 
 
42 
struct group *
43 
getgrent()
44 
{
45 
	register char *p, **q;
46 
 
47 
	if( !grf && !(grf = fopen( GROUP, "r" )) )
48 
		return(NULL);
49 
	if( !(p = fgets( line, BUFSIZ, grf )) )
50 
		return(NULL);
51 
	group.gr_name = p;
52 
	p = grskip(p,CL); /* passwd */
53 
	group.gr_gid = atoi(p = grskip(p,CL));
54 
	group.gr_mem = gr_mem;
55 
	p = grskip(p,CL);
56 
	grskip(p,NL);
57 
	q = gr_mem;
58 
	while( *p ){
59 
		*q++ = p;
60 
		p = grskip(p,CM);
61 
	}
62 
	*q = NULL;
63 
	return( &group );
64 
}