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PROCENV(1) - Linux manual page online | User commands

Display process environment details.

PROCENV(1) General Commands Manual PROCENV(1)


procenv - display process environment details


procenv [OPTION]


Display details of the process environment in a parseable format.


Options shown with a bracketed asterisk '(*)' are non-display options and must preceed any other (display) options. -a, --meta Display meta details. -A, --arguments Display program arguments. -b, --libs Display details of linked libraries. See dl_iterate_phdr(3). -B, --libc Display standard library details. See feature_test_macros(7) (Linux). -c, --cgroups Display cgroup details (Linux only). See proc(5). -C, --cpu Display CPU and scheduler details. See kvm_getprocs(3) (BSD), pthread_getaffin‐ ity_np(3), sched_getcpu(3) (Linux). --crumb-separator=str (*) Specify string str as alternate delimiter for crumb format output (default=':'). -d, --compiler Display compiler details. See cpp(1), cc(1) and feature_test_macros(7) (Linux). -e, --environment Display environment variables. See environ(7). -E, --semaphores Display semaphore details (not queryable on BSD). See semctl(2). --exec (*) Treat non-option arguments as program to execute after running procenv. See exec(3). -f, --fds Display file descriptor details. Under FreeBSD, file descriptor capabilities will also be displayed assuming the kernel has Capsicum support. See cap_getmode(2) (BSD), cap_rights_get(2) (BSD), cap_rights_is_set(3) (BSD), fcntl(2), isatty(5). -F, --namespaces Display namespace details (Linux only). See proc(5). --file=FILE (*) Send output to file FILE (implies --output=file). --file-append (*) If --file is specifed, append to it rather than overwriting it. --format=FORMAT (*) Specify output format. FORMAT may be one of: · crumb ("breadcrumbs"). · json (JavaScript Object Notation). · text (plain ASCII text) [default]. · xml (Extensible Markup Language). -g, --sizeof Display sizes of data types. -h, --help This help text. -i, --misc Display miscellaneous details. See umask(P), getcwd(3), personality(2) (Linux), proc(5), prctl(2), aa_getcon(2) (Linux), getpidcon(3) (Linux), sysconf(3), kvm_get‐ procs(3) (BSD), getpriority(2). --indent (*) Number of indent characters to use for each indent (default=2). --indent-char=c (*) Use character c for indenting (default=' ' (space)). -j, --uname Display uname details. See uname(2). -k, --clocks Display clock details. See clock_getres(2). -l, --limits Display limits. See getrlimit(2). -L, --locale Display locale details. See setlocale(3) and locale(7). -m, --mounts Display mount details. See getmntent(3) and statfs(2) (Linux), and getmntinfo(3) (BSD). -M, --message-queues Display message queue details (not queryable on BSD). See msgctl(2). -n, --confstr Display confstr details. See confstr(5). -N, --network Display network details. See getifaddrs(3), getnameinfo(3), ip(7), netdevice(7), and ioctl(2) (Linux). -o, --oom Display out-of-memory manager details (Linux only). See proc(5). --output=TYPE (*) Send output to alternative location. TYPE can be one of: · file (send output to a file). · stderr (write to standard error). · stdout (write to standard output (default)). · syslog (write to the system log file). · terminal (write to terminal). -p, --process Display process details. See getpid(2), getppid(2), getresuid(2), getresgid(2), getuid(2), geteuid(2), getgid(2), getegid(2), getsid(2), getlogin(3), getpgrp(2), ctermid(3), tcgetpgrp(3), tcgetsid(3), getpwuid(3) and getgroups(2). -P, --platform Display platform details. -q, --time Display time details. See clock_gettime(2), localtime(3) and asctime(3). -r, --ranges Display range of data types. See limits.h(P). -s, --signals Display signal details. See sigaction(2). -S, --shared-memory Display shared memory details (not queryable on BSD). See shmctl(2). --separator=str (*) Specify string str as alternate delimiter for text format output (default=': '). -t, --tty Display terminal details. On Linux, will also show if any attributes are locked when running as root. See tcgetattr(3) and tty_ioctl(4) (Linux). -T, --threads Display thread details. See pthread_attr_getstacksize(3), pthread_attr_getstack‐ size(3) and pthread_attr_getguardsize(3). -u, --stat Display stat details. See stat(2). -U, --rusage Display rusage details. See getrusage(2). -v, --version Display version details. -w, --capabilities Display Linux capability details. For FreeBSD file descriptor capabilities, see --file-descriptors. See prctl(2) (Linux), libcap(3) (Linux). -x, --pathconf Display pathconf details. See pathconf(3). -y, --sysconf Display sysconf details. See sysconf(3) and posixoptions(7) (Linux). -Y, --memory Display memory details. See getpagesize(2), numa(3) (Linux) and numa(7) (Linux). -z, --timezone Display timezone details. See tzset(3).


The following environment variables may be used as aliases to their command-line counter‐ parts: PROCENV_CRUMB_SEPARATOR Alternative to --crumb-separator. PROCENV_EXEC Alternative to --exec. PROCENV_FILE Alternative to --file. PROCENV_FILE_APPEND Alternative to --file-append. PROCENV_FORMAT Alternative to --format. PROCENV_INDENT Alternative to --indent. PROCENV_INDENT_CHAR Alternative to --indent-char. PROCENV_SEPARATOR Alternative to --separator. PROCENV_OUTPUT Alternative to --output.


· Options are considered in order, so --output should precede any other option. · If no display option is specified, all details are displayed. · Only one display option may be specified. · Command-line options take priority over environment variables. · All values for --indent-char are literal except '\t' which can be used to specify a tab character. The same is true for --separator-char and --crumb-separator but only if it is the first character specified. · Specifying a visible indent-char is only (vaguely) meaningful for text output. · If --exec is specified, atleast one non-option argument must also be specified. · Any long option name may be shortened as long as it remains unique. · The crumb output format is designed for easy parsing: it displays the data in a flat‐ tened format with each value on a separate line preceded by all appropriate headings which are separated by the current separator. · The --message-queues, --semaphores and --shared-memory options are not available on BSD since although the values are queryable, there is no documented method to do so.


# Show limits procenv -l # Send compiler information to syslog (note the order of the options). procenv --output=syslog --compiler # Write compiler details direct to the terminal procenv --output=terminal --compiler # Run a command ('mycmd --arg1 --foo=bar') without creating a new # process, but have procenv run first and log its output to a # regular file. exec procenv --file=/tmp/procenv.log --exec -- mycmd --arg1 --foo=bar # The following kernel command-line snippet will cause procenv to # write output to first serial tty device and then execute init(8) # in debug mode to allow early boot environment to be examined. init=/usr/bin/procenv PROCENV_FILE=/dev/ttyS0 PROCENV_EXEC="/sbin/init --debug" # Display all data in JSON format using an indent of 4 spaces procenv --format=json --indent=4 # Display all data in XML format using tabs for indents procenv --format=xml --indent-char="\t" # Display signal details in XML format procenv --format=xml --signals # Display resource limits in easily-parseable format procenv --format=crumb --limits # Produce output suitable for importing into a spreadsheet procenv --format=crumb --crumb-separator=',' --separator=',' --limits # Produce stylised output procenv --format=crumb --crumb-separator=' → ' --separator='='


· Spaces within the value of PROCENV_EXEC are treated as delimiters meaning that any spaces within a string argument for example will result in incorrect behaviour. · The separator character must be chosen carefully since no check is performed on the data to see if it itself contains instances of the separator character.


Written by James Hunt <> and Kees Cook <>.
Copyright © 2012-2016 James Hunt <> and Kees Cook <>. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


GNU GPL version 3 or later <>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


capabilities(7) (Linux), capsicum(4) (BSD), cc(1), credentials(7), date(1), env(1), exec(P), getconf(1), groups(1), ifconfig(8), ip(9), ipcs(1), kill(1), ldd(1), locale(1), ls(1), mount(1), proc(5), ps(1), rights(4)(BSD), sh(1), stat(1), stty(1), umask(P), uname(1)
User Commands 2016-03-10 PROCENV(1)
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procenv(1) referred by
refer to aa_getcon(2) | cap_getmode(2freebsd) | capabilities(7) | capsicum(4freebsd) | clock_getres(2) | credentials(7) | ctermid(3) | ctime(3) | dash(1) | date(1) | dl_iterate_phdr(3) | env(1) | environ(7) | exec(3) | fcntl(2) | feature_test_macros(7) | fpathconf(3) | getcon(3) | getconf(1) | getcwd(3)
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