proc_pid_environ(5)           File Formats Manual          proc_pid_environ(5)

NAME
       /proc/pid/environ - initial environment

DESCRIPTION
       /proc/pid/environ
              This file contains the initial environment that was set when the
              currently executing program was started via execve(2).  The
              entries are separated by null bytes ('\0'), and there may be a
              null byte at the end.  Thus, to print out the environment of
              process 1, you would do:

                  $ cat /proc/1/environ | tr '\000' '\n'

              If, after an execve(2), the process modifies its environment
              (e.g., by calling functions such as putenv(3) or modifying the
              environ(7) variable directly), this file will not reflect those
              changes.

              Furthermore, a process may change the memory location that this
              file refers via prctl(2) operations such as PR_SET_MM_ENV_START.

              Permission to access this file is governed by a ptrace access
              mode PTRACE_MODE_READ_FSCREDS check; see ptrace(2).

SEE ALSO
       proc(5)

Linux man-pages 6.9.1             2024-06-15               proc_pid_environ(5)