shadow/lib/groupio.c

#include <config.h>

#include "rcsid.h"
RCSID("$Id: groupio.c,v 1.10 2001/08/14 21:10:36 malekith Exp $")

#include "prototypes.h"
#include "defines.h"

#include "commonio.h"
#include "groupio.h"

extern int putgrent(const struct group *, FILE *);
extern struct group *sgetgrent(const char *);

struct group *
__gr_dup(const struct group *grent)
{
	struct group *gr;
	int i;

	if (!(gr = (struct group *) malloc(sizeof *gr)))
		return NULL;
	*gr = *grent;
	if (!(gr->gr_name = strdup(grent->gr_name)))
		return NULL;
	if (!(gr->gr_passwd = strdup(grent->gr_passwd)))
		return NULL;

	for (i = 0; grent->gr_mem[i]; i++)
		;
	gr->gr_mem = (char **) malloc((i + 1) * sizeof(char *));
	if (!gr->gr_mem)
		return NULL;
	for (i = 0; grent->gr_mem[i]; i++) {
		gr->gr_mem[i] = strdup(grent->gr_mem[i]);
		if (!gr->gr_mem[i])
			return NULL;
	}
	gr->gr_mem[i] = NULL;
	return gr;
}

static void *
group_dup(const void *ent)
{
	const struct group *gr = ent;
	return __gr_dup(gr);
}

static void
group_free(void *ent)
{
	struct group *gr = ent;

	free(gr->gr_name);
	free(gr->gr_passwd);
	while(*(gr->gr_mem)) {
		free(*(gr->gr_mem));
		gr->gr_mem++;
	}
	free(gr);
}

static const char *
group_getname(const void *ent)
{
	const struct group *gr = ent;
	return gr->gr_name;
}

static void *
group_parse(const char *line)
{
	return (void *) sgetgrent(line);
}

static int
group_put(const void *ent, FILE *file)
{
	const struct group *gr = ent;
	return (putgrent(gr, file) == -1) ? -1 : 0;
}

static struct commonio_ops group_ops = {
	group_dup,
	group_free,
	group_getname,
	group_parse,
	group_put,
	fgetsx,
	fputsx
};

static struct commonio_db group_db = {
	GROUP_FILE,	/* filename */
	&group_ops,	/* ops */
	NULL,		/* fp */
	NULL,		/* head */
	NULL,		/* tail */
	NULL,		/* cursor */
	0,		/* changed */
	0,		/* isopen */
	0,		/* locked */
	0		/* readonly */
};

int
gr_name(const char *filename)
{
	return commonio_setname(&group_db, filename);
}

int
gr_lock(void)
{
	return commonio_lock(&group_db);
}

int
gr_open(int mode)
{
	return commonio_open(&group_db, mode);
}

const struct group *
gr_locate(const char *name)
{
	return commonio_locate(&group_db, name);
}

int
gr_update(const struct group *gr)
{
	return commonio_update(&group_db, (const void *) gr);
}

int
gr_remove(const char *name)
{
	return commonio_remove(&group_db, name);
}

int
gr_rewind(void)
{
	return commonio_rewind(&group_db);
}

const struct group *
gr_next(void)
{
	return commonio_next(&group_db);
}

int
gr_close(void)
{
	return commonio_close(&group_db);
}

int
gr_unlock(void)
{
	return commonio_unlock(&group_db);
}

void
__gr_set_changed(void)
{
	group_db.changed = 1;
}

struct commonio_entry *
__gr_get_head(void)
{
	return group_db.head;
}

struct commonio_db *
__gr_get_db(void)
{
	return &group_db;
}

void
__gr_del_entry(const struct commonio_entry *ent)
{
	commonio_del_entry(&group_db, ent);
}

static int
gr_cmp(const void *p1, const void *p2)
{
	gid_t u1, u2;

	if ((*(struct commonio_entry**)p1)->eptr == NULL)
		return 1;
	if ((*(struct commonio_entry**)p2)->eptr == NULL)
		return -1;
	
	u1 = ((struct group *)(*(struct commonio_entry**)p1)->eptr)->gr_gid;
	u2 = ((struct group *)(*(struct commonio_entry**)p2)->eptr)->gr_gid;

	if (u1 < u2)
		return -1;
	else if (u1 > u2)
		return 1;
	else
		return 0;
}

/* Sort entries by gid */
int
gr_sort()
{
	return commonio_sort(&group_db, gr_cmp);
}