BSD 3 release

[unix-history] / usr / src / cmd / csh / getpwent.c

/* Copyright (c) 1979 Regents of the University of California */
#include <pwd.h>

#define BUFSIZ  160

static int pwf = -1;
static char line[BUFSIZ+1];
static struct passwd passwd;

setpwent()
{
       if( pwf == -1 )
               pwf = open( "/etc/passwd", 0 );
       else
               lseek(pwf, 0l, 0);
}

endpwent()
{
       if( pwf != -1 ){
               close( pwf );
               pwf = -1;
       }
}

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

struct passwd *
getpwent()
{
       register char *p, *q;
       register int i, j;

       if (pwf == -1) {
               if( (pwf = open( "/etc/passwd", 0 )) == -1 )
                       return(0);
       }
       i = read(pwf, line, BUFSIZ);
       for (j = 0; j < i; j++)
               if (line[j] == '\n')
                       break;
       if (j >= i)
               return(0);
       line[++j] = 0;
       lseek(pwf, (long) (j - i), 1);
       p = line;
       passwd.pw_name = p;
       p = pwskip(p);
/*      passwd.pw_passwd = p; */
       p = q = pwskip(p);
/*      passwd.pw_uid = atoi(p); */
       p = pwskip(p);
       p[-1] = 0;
       passwd.pw_uid = atou(q);
/*      passwd.pw_gid = atoi(p); */
/*      passwd.pw_quota = 0; */
/*      passwd.pw_comment = ""; */
       q = p;
       p = pwskip(p);
       p[-1] = 0;
#ifdef CORY
       passwd.pw_uid =+ atou(q) << 8;
#endif
#ifdef CC
       passwd.pw_uid =+ atou(q) << 8;
#endif
#ifndef CORY
#ifndef CC
       passwd.pw_gid = atou(q);
#endif
#endif
/*      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);
}

atou(p)
       register char *p;
{
       register int i = 0;

       if (p != 0)
               while (*p)
                       i = i * 10 + *p++ - '0';
       return (i);
}