shadow/lib/pwio.c

#include <config.h>

#include "rcsid.h"
RCSID("$Id: pwio.c,v 1.13 2003/05/03 16:14:23 kloczek Exp $")

#include "prototypes.h"
#include "defines.h"
#include <pwd.h>
#include <stdio.h>

#include "commonio.h"
#include "pwio.h"

extern struct passwd *sgetpwent(const char *);
extern int putpwent(const struct passwd *, FILE *);

struct passwd *
__pw_dup(const struct passwd *pwent)
{
	struct passwd *pw;

	if (!(pw = (struct passwd *) malloc(sizeof *pw)))
		return NULL;
	*pw = *pwent;
	if (!(pw->pw_name = strdup(pwent->pw_name)))
		return NULL;
	if (!(pw->pw_passwd = strdup(pwent->pw_passwd)))
		return NULL;
	if (!(pw->pw_gecos = strdup(pwent->pw_gecos)))
		return NULL;
	if (!(pw->pw_dir = strdup(pwent->pw_dir)))
		return NULL;
	if (!(pw->pw_shell = strdup(pwent->pw_shell)))
		return NULL;
	return pw;
}

static void *
passwd_dup(const void *ent)
{
	const struct passwd *pw = ent;
	return __pw_dup(pw);
}

static void
passwd_free(void *ent)
{
	struct passwd *pw = ent;

	free(pw->pw_name);
	free(pw->pw_passwd);
	free(pw->pw_gecos);
	free(pw->pw_dir);
	free(pw->pw_shell);
	free(pw);
}

static const char *
passwd_getname(const void *ent)
{
	const struct passwd *pw = ent;
	return pw->pw_name;
}

static void *
passwd_parse(const char *line)
{
	return (void *) sgetpwent(line);
}

static int
passwd_put(const void *ent, FILE *file)
{
	const struct passwd *pw = ent;
	return (putpwent(pw, file) == -1) ? -1 : 0;
}

static struct commonio_ops passwd_ops = {
	passwd_dup,
	passwd_free,
	passwd_getname,
	passwd_parse,
	passwd_put,
	fgets,
	fputs
};

static struct commonio_db passwd_db = {
	PASSWD_FILE,	/* filename */
	&passwd_ops,	/* ops */
	NULL,		/* fp */
	NULL,		/* head */
	NULL,		/* tail */
	NULL,		/* cursor */
	0,		/* changed */
	0,		/* isopen */
	0,		/* locked */
	0		/* readonly */
};

int
pw_name(const char *filename)
{
	return commonio_setname(&passwd_db, filename);
}

int
pw_lock(void)
{
	return commonio_lock(&passwd_db);
}

int
pw_open(int mode)
{
	return commonio_open(&passwd_db, mode);
}

const struct passwd *
pw_locate(const char *name)
{
	return commonio_locate(&passwd_db, name);
}

int
pw_update(const struct passwd *pw)
{
	return commonio_update(&passwd_db, (const void *) pw);
}

int
pw_remove(const char *name)
{
	return commonio_remove(&passwd_db, name);
}

int
pw_rewind(void)
{
	return commonio_rewind(&passwd_db);
}

const struct passwd *
pw_next(void)
{
	return commonio_next(&passwd_db);
}

int
pw_close(void)
{
	return commonio_close(&passwd_db);
}

int
pw_unlock(void)
{
	return commonio_unlock(&passwd_db);
}

struct commonio_entry *
__pw_get_head(void)
{
	return passwd_db.head;
}

void
__pw_del_entry(const struct commonio_entry *ent)
{
	commonio_del_entry(&passwd_db, ent);
}

struct commonio_db *
__pw_get_db(void)
{
	return &passwd_db;
}

static int
pw_cmp(const void *p1, const void *p2)
{
	uid_t u1, u2;

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

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

/* Sort entries by uid */
int
pw_sort()
{
	return commonio_sort(&passwd_db, pw_cmp);
}