newlib/libc/unix/getpwent.c

   1 #ifndef _NO_GETPWENT
   2
   3 #include <stdio.h>
   4 #include <sys/types.h>
   5 #include <pwd.h>
   6 #include <errno.h>
   7 #include <unistd.h>
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <limits.h>
  11
  12 static struct passwd pw_passwd; /* password structure */
  13 static FILE *passwd_fp;
  14
  15 static char logname[8];
  16 static char password[1024];
  17 static char gecos[1024];
  18 static char dir[1024];
  19 static char shell[1024];
  20
  21 struct passwd *
  22 getpwnam (name)
  23      const char *name;
  24 {
  25   FILE *fp;
  26   char buf[1024];
  27
  28   if ((fp = fopen ("/etc/passwd", "r")) == NULL)
  29     {
  30       return NULL;
  31     }
  32
  33   while (fgets (buf, sizeof (buf), fp))
  34     {
  35       sscanf (buf, "%[^:]:%[^:]:%d:%d:%[^:]:%[^:]:%s\n",
  36               logname, password, &pw_passwd.pw_uid,
  37              &pw_passwd.pw_gid, gecos,
  38               dir, shell);
  39       pw_passwd.pw_name = logname;
  40       pw_passwd.pw_passwd = password;
  41       pw_passwd.pw_comment = "";
  42       pw_passwd.pw_gecos = gecos;
  43       pw_passwd.pw_dir = dir;
  44       pw_passwd.pw_shell = shell;
  45
  46       if (!strcmp (logname, name))
  47         {
  48           fclose (fp);
  49           return &pw_passwd;
  50         }
  51     }
  52   fclose (fp);
  53   return NULL;
  54 }
  55
  56 struct passwd *
  57 getpwuid (uid_t uid)
  58 {
  59   FILE *fp;
  60   char buf[1024];
  61
  62   if ((fp = fopen ("/etc/passwd", "r")) == NULL)
  63     {
  64       return NULL;
  65     }
  66
  67   while (fgets (buf, sizeof (buf), fp))
  68     {
  69       sscanf (buf, "%[^:]:%[^:]:%d:%d:%[^:]:%[^:]:%s\n",
  70               logname, password, &pw_passwd.pw_uid,
  71              &pw_passwd.pw_gid, gecos,
  72               dir, shell);
  73       pw_passwd.pw_name = logname;
  74       pw_passwd.pw_passwd = password;
  75       pw_passwd.pw_comment = "";
  76       pw_passwd.pw_gecos = gecos;
  77       pw_passwd.pw_dir = dir;
  78       pw_passwd.pw_shell = shell;
  79
  80       if (uid == pw_passwd.pw_uid)
  81         {
  82           fclose (fp);
  83           return &pw_passwd;
  84         }
  85     }
  86   fclose (fp);
  87   return NULL;
  88 }
  89
  90 struct passwd *
  91 getpwent ()
  92 {
  93   char buf[1024];
  94
  95   if (passwd_fp == NULL)
  96     return NULL;
  97
  98   if (fgets (buf, sizeof (buf), passwd_fp) == NULL)
  99     return NULL;
 100
 101   sscanf (buf, "%[^:]:%[^:]:%d:%d:%[^:]:%[^:]:%s\n",
 102           logname, password, &pw_passwd.pw_uid,
 103          &pw_passwd.pw_gid, gecos,
 104           dir, shell);
 105   pw_passwd.pw_name = logname;
 106   pw_passwd.pw_passwd = password;
 107   pw_passwd.pw_comment = "";
 108   pw_passwd.pw_gecos = gecos;
 109   pw_passwd.pw_dir = dir;
 110   pw_passwd.pw_shell = shell;
 111
 112   return &pw_passwd;
 113 }
 114
 115 void
 116 setpwent ()
 117 {
 118   if (passwd_fp != NULL)
 119     fclose (passwd_fp);
 120
 121   passwd_fp = fopen ("/etc/passwd", "r");
 122 }
 123
 124 void
 125 endpwent ()
 126 {
 127   if (passwd_fp != NULL)
 128     fclose (passwd_fp);
 129 }
 130
 131 #endif /* !_NO_GETPWENT  */