conn_create_fifo(),
conn_create_unix_socket() and
vignettes/internals.Rmd for documentation. These functions
are currently experimental.processx now closes file unneeded file descriptors when redirecting the standard output and error, in the client file.
processx errors now do not have rlang_error and
rlang_trace classes, because they are actually not
compatible with rlang errors and traces.
run() now sets stderr to
NULL in the result (instead of an empty string), if the
standard error was redirected to the standard output. This also fixes an
error when interrupting a run() with a redirected standard
error.
processx now does not fail if the current working directory
contains a non-ASCII character on Windows, and getwd()
returns a short path for it (#313).
run() now does not truncate stdout and stderr when
the output contains multibyte characters (#298, @infotroph).
processx now compiles with custom compilers that enable OpenMP (#297).
processx now avoids a race condition when the working directory is changed right after starting a process, potentially before the sub-process is initialized (#300).
processx now works with non-ASCII path names on non-UTF-8 Unix platforms (#293).
You can now append environment variables to the ones set in the
current process if you include "current" in the value of
env, in run() and for
process$new():
env = c("current", NEW = "newvalue") (#232).
Sub-processes can now inherit the standard input, output and
error from the main R process, by setting the corresponding argument to
an empty string. E.g. run("ls", stdout = "")
(#72).
run() is now much faster with large standard output
or standard error (#286).
run() can now discard the standard output and error
or redirect them to file(s), instead of collecting them.
processx now optionally uses the cli package to color error messages and stack traces, instead of crayon.
New options in pty_options to set the initial size
of the pseudo terminal.
Reading the standard output or error now does not crash
occasionally when a \n character is at the beginning of the
input buffer (#281).
processx now works correctly for non-ASCII commands and arguments passed in the native encoding, on Windows (#261, #262, #263, #264).
Providing multiple environment variables now works on windows (#267).
The supervisor (activated with supervise = TRUE)
does not crash on the Windows Subsystem on Linux (WSL) now
(#222).
Fix ABI compatibility for pre and post R 4.0.1 versions. Now CRAN builds (with R 4.0.2 and later 4.0.x) work well on R 4.0.0.
Now processx can run commands on UNC paths specified with forward
slashes: //hostname/... UNC paths with the usual
back-slashes were always fine (#249).
The $as_ps_handle() method works now better;
previously it sometimes created an invalid ps::ps_handle
object, if the system clock has changed (#258).
run() now does a better job with displaying the
spinner on terminals that buffer the output (#223).
Error messages are now fully printed after an error. In non-interactive sessions, the stack trace is printed as well.
Further improved error messages. Errors from C code now include the name of the C function, and errors that belong to a process include the system command (#197).
processx does not crash now if the process receives a SIGPIPE signal when trying to write to a pipe, of which the other end has already exited.
processx now to works better with fork clusters from the parallel package. See ‘Mixing processx and the parallel base R package’ in the README file (#236).
processx now does no block SIGCHLD by default in the subprocess, blocking potentially causes zombie sub-subprocesses (#240).
The process$wait() method now does not leak file
descriptors on Unix when interrupted (#141).
run() does not create an ok variable
in the global environment.Processx has now better error messages, in particular, all errors from C code contain the file name and line number, and the system error code and message (where applicable).
Processx now sets the .Last.error variable for every
un-caught processx error to the error condition, and also sets
.Last.error.trace to its stack trace.
run() now prints the last 10 lines of the standard
error stream on error, if echo = FALSE, and it also prints
the exit status of the process.
run() now includes the standard error in the
condition signalled on interrupt.
process now supports creating pseudo terminals on
Unix systems.
conn_create_pipepair() gets new argument to set the
pipes as blocking or non-blocking.
process does not set the inherited extra connections
as blocking, and it also does not close them after starting the
subprocess. This is now the responsibility of the user. Note that this
is a breaking change.
run() now passes extra ... arguments to
process$new().
run() now does not error if the process is killed in
a callback.
process can now redirect the standard error to the
standard output, via specifying stderr = "2>&1".
This works both with files and pipes.
run() can now redirect the standard error to the
standard output, via the new stderr_to_stdout
argument.
The $kill() and $kill_tree() methods
get a close_connection = TRUE argument that closes all pipe
connections of the process.
run() now always kills the process (and its process
tree if cleanup_tree is TRUE) before exiting.
This also closes all pipe connections (#149).
New process$kill_tree() method, and new
cleanup_tree arguments in run() and
process$new(), to clean up the process tree rooted at a
processx process. (#139, #143).
New process$interupt() method to send an interrupt
to a process, SIGINT on Unix, CTRL+C on Windows (#127).
New stdin argument in process$new() to
support writing to the standard input of a process (#27, #114).
New connections argument in
process$new() to support passing extra connections to the
child process, in addition to the standard streams.
New poll_connection argument to
process$new(), an extra connection that can be used to poll
the process, even if stdout and stderr are not
pipes (#125).
poll() now works with connections objects, and they
can be mixed with process objects (#121).
New env argument in run() and
process$new(), to set the environment of the child process,
optionally (#117, #118).
Removed the $restart() method, because it was less
useful than expected, and hard to maintain (#116).
New conn_set_stdout() and
conn_set_stderr() to set the standard output or error of
the calling process.
New conn_disable_inheritance() to disable stdio
inheritance. It is suggested that child processes call this immediately
after starting, so the file handles are not inherited further.
Fixed a signal handler bug on Unix that marked the process as finished, even if it has not (d221aa1f).
Fixed a bug that occasionally caused crashes in
wait(), on Unix (#138).
When run() is interrupted, no error message is
printed, just like for interruption of R code in general. The thrown
condition now also has the interrupt class (#148).
Fix interference with the parallel package, and other packages
that redefine the SIGCHLD signal handler on Unix. If the
processx signal handler is overwritten, we might miss the exit status of
some processes (they are set to NA).
run() and process$new() allow
specifying the working directory of the process (#63).
Make the debugme package an optional dependency (#74).
processx is now compatible with R 3.1.x.
Allow polling more than 64 connections on Windows, by using IOCP
instead of WaitForMultipleObjects() (#81, #106).
Fix a race condition on Windows, when creating named pipes for stdout or stderr. The client sometimes didn’t wait for the server, and processx failed with ERROR_PIPE_BUSY (231, All pipe instances are busy).
Fix a crash on windows when trying to run a non-existing command (#90)
Fix a race condition in process$restart()
run() and process$new() do not support
the commandline argument any more, because process cleanup
is error prone with an intermediate shell. (#88)
processx process objects no longer use R connection
objects, because the R connection API was retroactive made private by
R-core processx uses its own connection class now to manage
standard output and error of the process.
The encoding of the standard output and error can be specified
now, and processx re-encodes stdout and
stderr in UTF-8.
Cloning of process objects is disables now, as it is likely that it causes problems (@wch).
supervise option to kill child process if R crashes
(@wch).
Add get_output_file and get_error_file,
has_output_connection() and
has_error_connection() methods (@wch).
stdout and stderr default to
NULL now, i.e. they are discarded (@wch).
Fix undefined behavior when stdout/stderr was read out after the process was already finalized, on Unix.
run(): Better message on interruption, kill process
when interrupted.
Unix: better kill count on unloading the package.
Unix: make wait() work when SIGCHLD is not delivered for some reason.
Unix: close inherited file descriptors more conservatively.
Fix a race condition and several memory leaks on Windows.
Fixes when running under job control that does not allow breaking away from the job, on Windows.
This is an unofficial release, created by CRAN, to fix compilation on Solaris.
First public release.