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);
}