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#include <stdio.h>
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#include <pwd.h>
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#include <stdlib.h>
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static char PASSWD[]	= "/etc/passwd";
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static FILE *pwf = NULL;
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static char line[BUFSIZ+2];
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static struct passwd passwd;
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void
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setpwent(void)
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{
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	if( pwf == NULL )
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		pwf = fopen( PASSWD, "r" );
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	else
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		rewind( pwf );
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}
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void
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endpwent(void)
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{
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	if( pwf != NULL ){
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		fclose( pwf );
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		pwf = NULL;
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	}
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}
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static char *
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pwskip(char *p)
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{
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	while( *p && *p != ':' && *p != '\n' )
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		++p;
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	if( *p ) *p++ = 0;
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	else p[1] = 0;
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	return(p);
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}
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struct passwd *
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pwdecode(char *p)
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{
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	passwd.pw_name = p;
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	p = pwskip(p);
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	p = pwskip(p); /* passwd */
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	passwd.pw_uid = atoi(p);
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	p = pwskip(p);
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	passwd.pw_gid = atoi(p);
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	p = pwskip(p); /* comment */
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	p = pwskip(p); /* gecos */
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	passwd.pw_dir = p;
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	p = pwskip(p);
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	passwd.pw_shell = p;
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	pwskip(p);
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	return(&passwd);
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}
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struct passwd *
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getpwent(void)
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{
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	register char *p;
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	if (pwf == NULL) {
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		if( (pwf = fopen( PASSWD, "r" )) == NULL )
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			return(0);
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	}
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	p = fgets(line, BUFSIZ, pwf);
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	if (p==NULL)
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		return(0);
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	return pwdecode (p);
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}