BSD 4 release

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

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

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

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

endpwent()
{
       if( pwf != NULL ){
               fclose( pwf );
               pwf = NULL;
       }
}

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

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

       if (pwf == NULL) {
               if( (pwf = fopen( PASSWD, "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);
}