4.3BSD beta release manual page

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

/* @(#)getpwent.c       4.6 (Berkeley) 85/01/21 */
#include <stdio.h>
#include <pwd.h>
#include <ndbm.h>

static char EMPTY[] = "";
static FILE *pwf = NULL;
static char line[BUFSIZ+1];
static struct passwd passwd;

/*
* The following are shared with getpwnamuid.c
*/
char    *_pw_file = "/etc/passwd";
DBM     *_pw_db;
int     _pw_stayopen;

setpwent()
{
       if (pwf == NULL)
               pwf = fopen(_pw_file, "r");
       else
               rewind(pwf);
}

endpwent()
{
       if (pwf != NULL) {
               fclose(pwf);
               pwf = NULL;
       }
       if (_pw_db != (DBM *)0) {
               dbm_close(_pw_db);
               _pw_db = (DBM *)0;
               _pw_stayopen = 0;
       }
}

static char *
pwskip(p)
register char *p;
{
       while (*p && *p != ':' && *p != '\n')
               ++p;
       if (*p)
               *p++ = 0;
       return(p);
}

struct passwd *
getpwent()
{
       register char *p;

       if (pwf == NULL) {
               if ((pwf = fopen( _pw_file, "r" )) == NULL)
                       return(0);
       }
       p = fgets(line, BUFSIZ, pwf);
       if (p == NULL)
               return(0);
       passwd.pw_name = p;
       p = pwskip(p);
       passwd.pw_passwd = p;
       p = pwskip(p);
       passwd.pw_uid = atoi(p);
       p = pwskip(p);
       passwd.pw_gid = atoi(p);
       passwd.pw_quota = 0;
       passwd.pw_comment = EMPTY;
       p = pwskip(p);
       passwd.pw_gecos = p;
       p = pwskip(p);
       passwd.pw_dir = p;
       p = pwskip(p);
       passwd.pw_shell = p;
       while (*p && *p != '\n')
               p++;
       *p = '\0';
       return(&passwd);
}

setpwfile(file)
       char *file;
{
       _pw_file = file;
}