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#include <stdio.h>
#include <sys/types.h>
#include <pwd.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
static struct passwd pw_passwd; /* password structure */
static FILE *passwd_fp;
static char logname[8];
static char password[1024];
static char comment[1024];
static char gecos[1024];
static char dir[1024];
static char shell[1024];
struct passwd *
getpwnam (name)
const char *name;
{
FILE *fp;
int uid, gid;
char buf[1024];
if ((fp = fopen ("/etc/passwd", "r")) == NULL)
{
return NULL;
}
while (fgets (buf, sizeof (buf), fp))
{
sscanf (buf, "%[^:]:%[^:]:%d:%d:%[^:]:%[^:]:%s\n",
logname, password, &pw_passwd.pw_uid,
&pw_passwd.pw_gid, comment, gecos,
dir, shell);
pw_passwd.pw_name = logname;
pw_passwd.pw_passwd = password;
pw_passwd.pw_comment = comment;
pw_passwd.pw_gecos = gecos;
pw_passwd.pw_dir = dir;
pw_passwd.pw_shell = shell;
if (!strcmp (logname, name))
{
fclose (fp);
return &pw_passwd;
}
}
fclose (fp);
return NULL;
}
struct passwd *
getpwuid (uid_t uid)
{
FILE *fp;
char buf[1024];
if ((fp = fopen ("/etc/passwd", "r")) == NULL)
{
return NULL;
}
while (fgets (buf, sizeof (buf), fp))
{
sscanf (buf, "%[^:]:%[^:]:%d:%d:%[^:]:%[^:]:%s\n",
logname, password, &pw_passwd.pw_uid,
&pw_passwd.pw_gid, comment, gecos,
dir, shell);
pw_passwd.pw_name = logname;
pw_passwd.pw_passwd = password;
pw_passwd.pw_comment = comment;
pw_passwd.pw_gecos = gecos;
pw_passwd.pw_dir = dir;
pw_passwd.pw_shell = shell;
if (uid == pw_passwd.pw_uid)
{
fclose (fp);
return &pw_passwd;
}
}
fclose (fp);
return NULL;
}
struct passwd *
getpwent ()
{
char buf[1024];
if (passwd_fp == NULL)
return NULL;
if (fgets (buf, sizeof (buf), passwd_fp) == NULL)
return NULL;
sscanf (buf, "%[^:]:%[^:]:%d:%d:%[^:]:%[^:]:%s\n",
logname, password, &pw_passwd.pw_uid,
&pw_passwd.pw_gid, comment, gecos,
dir, shell);
pw_passwd.pw_name = logname;
pw_passwd.pw_passwd = password;
pw_passwd.pw_comment = comment;
pw_passwd.pw_gecos = gecos;
pw_passwd.pw_dir = dir;
pw_passwd.pw_shell = shell;
return &pw_passwd;
}
void
setpwent ()
{
if (passwd_fp != NULL)
fclose (passwd_fp);
passwd_fp = fopen ("/etc/passwd", "r");
}
void
endpwent ()
{
if (passwd_fp != NULL)
fclose (passwd_fp);
}
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