lib/other/cuserid.c

   1 /*  cuserid(3)
   2  *
   3  *  Author: Terrence W. Holm          Sept. 1987
   4  */
   5
   6 #include <lib.h>
   7 #include <pwd.h>
   8 #include <string.h>
   9 #include <unistd.h>
  10 #include <stdio.h>
  11
  12 #ifndef  L_cuserid
  13 #define  L_cuserid   9
  14 #endif
  15
  16 char *cuserid(user_name)
  17 char *user_name;
  18 {
  19   PRIVATE char userid[L_cuserid];
  20   struct passwd *pw_entry;
  21
  22   if (user_name == (char *)NULL) user_name = userid;
  23
  24   pw_entry = getpwuid(geteuid());
  25
  26   if (pw_entry == (struct passwd *)NULL) {
  27         *user_name = '\0';
  28         return((char *)NULL);
  29   }
  30   strcpy(user_name, pw_entry->pw_name);
  31
  32   return(user_name);
  33 }