man.postnix Miscellaneous man pages of Plan 9 related material

     GETENV(3)                                               GETENV(3)

     NAME
          getenv, putenv - access environment variables

     SYNOPSIS
          #include <u.h>
          #include <libc.h>

          char* getenv(char *name)
          int   putenv(char *name, char *val)

     DESCRIPTION
          Getenv fetches the environment value associated with name
          into memory allocated with malloc(3), 0-terminates it, and
          returns a pointer to that area.  If no file exists, 0 is
          returned.

          Putenv sets the environment value associated with name to
          val.

     SOURCE
          /usr/local/plan9/src/lib9/getenv.c

     DIAGNOSTICS
          Sets errstr.

     BUGS
          To avoid name conflicts with the underlying system, getenv
          and putenv are preprocessor macros defined as p9getenv and
          p9putenv; see intro(3).

     Page 1                       Plan 9            (printed 10/28/25)