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