2.11BSD#431 - /usr/src/libexec/tcpd/setenv.c

   1:  /*
   2:   * Some systems do not have setenv(). This one is modeled after 4.4 BSD, but
   3:   * is implemented in terms of portable primitives only: getenv(), putenv()
   4:   * and malloc(). It should therefore be safe to use on every UNIX system.
   5:   *
   6:   * If clobber == 0, do not overwrite an existing variable.
   7:   *
   8:   * Returns nonzero if memory allocation fails.
   9:   *
  10:   * Author: Wietse Venema, Eindhoven University of Technology, The Netherlands.
  11:   */
  12: 
  13: #ifndef lint
  14: static char sccsid[] = "@(#) setenv.c 1.1 93/03/07 22:47:58";
  15: #endif
  16: 
  17: /* setenv - update or insert environment (name,value) pair */
  18: 
  19: int     setenv(name, value, clobber)
  20: char   *name;
  21: char   *value;
  22: int     clobber;
  23: {
  24:     char   *malloc();
  25:     char   *getenv();
  26:     char   *cp;
  27: 
  28:     if (clobber == 0 && getenv(name) != 0)
  29:     return (0);
  30:     if ((cp = malloc(strlen(name) + strlen(value) + 2)) == 0)
  31:     return (1);
  32:     sprintf(cp, "%s=%s", name, value);
  33:     return (putenv(cp));
  34: }

Defined functions

Defined variables