date and time created 83/12/02 17:14:37 by ralph

[unix-history] / usr / src / lib / libc / gen / getpwnamuid.c

/*	getpwnamuid.c	4.1	83/12/02	*/

#include <stdio.h>
#include <pwd.h>
#include <ndbm.h>

#include <sys/file.h>

static char PASSWD[] = "/etc/passwd";
static char EMPTY[] = "";
static char line[BUFSIZ+1];
static struct passwd passwd;
static datum curkey;
static DBM *db = 0;

static struct passwd *
fetchpw(key)
	datum key;
{
        register char *cp;

        curkey = key;
        if (curkey.dptr == 0)
                return ((struct passwd *)NULL);
	key = dbmfetch(db, curkey);
	if (key.dptr == 0)
                return ((struct passwd *)NULL);
        cp = key.dptr;

#define	EXPAND(e)	passwd.pw_/**/e = cp; while (*cp++);
	EXPAND(name);
	EXPAND(passwd);
	passwd.pw_uid = *(int *)cp; cp += sizeof (int);
	passwd.pw_gid = *(int *)cp; cp += sizeof (int);
	passwd.pw_quota = *(int *)cp; cp += sizeof (int);
	EXPAND(comment);
	EXPAND(gecos);
	EXPAND(dir);
	EXPAND(shell);
        return (&passwd);
}

struct passwd *
getpwnam(nam)
	char *nam;
{
        datum key;
	register struct passwd *pw;

        if ((db = ndbmopen(PASSWD, O_RDONLY)) == (DBM *)0)
                return ((struct passwd *)NULL);
        key.dptr = nam;
        key.dsize = strlen(nam);
	pw = fetchpw(key);
	ndbmclose(db);
        return (pw);
}

struct passwd *
getpwuid(uid)
	int uid;
{
        datum key;
	register struct passwd *pw;

        if ((db = ndbmopen(PASSWD, O_RDONLY)) == (DBM *)0)
                return ((struct passwd *)NULL);
        key.dptr = (char *) &uid;
        key.dsize = sizeof uid;
	pw = fetchpw(key);
	ndbmclose(db);
        return (pw);
}