Subversion Repositories planix.SVN

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

static char PASSWD[]    = "/etc/passwd";
static FILE *pwf = NULL;
static char line[BUFSIZ+2];
static struct passwd passwd;

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

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

static char *
pwskip(char *p)
{
        while( *p && *p != ':' && *p != '\n' )
                ++p;
        if( *p ) *p++ = 0;
        else p[1] = 0;
        return(p);
}

struct passwd *
pwdecode(char *p)
{
        passwd.pw_name = p;
        p = pwskip(p);
        p = pwskip(p); /* passwd */
        passwd.pw_uid = atoi(p);
        p = pwskip(p);
        passwd.pw_gid = atoi(p);
        p = pwskip(p); /* comment */
        p = pwskip(p); /* gecos */
        passwd.pw_dir = p;
        p = pwskip(p);
        passwd.pw_shell = p;
        pwskip(p);
        return(&passwd);
}

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

        if (pwf == NULL) {
                if( (pwf = fopen( PASSWD, "r" )) == NULL )
                        return(0);
        }
        p = fgets(line, BUFSIZ, pwf);
        if (p==NULL)
                return(0);
        return pwdecode (p);
}