man > proc_pid_environ(5)

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  func‐
              tions 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 6.7                          2023-08-15                          proc_pid_environ(5)