aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--erts/doc/src/epmd.xml11
-rw-r--r--erts/emulator/beam/erl_trace.c2
-rw-r--r--erts/emulator/sys/unix/erl_child_setup.c14
-rw-r--r--erts/emulator/sys/unix/sys.c12
-rw-r--r--lib/common_test/test_server/ts_run.erl2
-rw-r--r--lib/kernel/doc/src/file.xml2
-rw-r--r--lib/kernel/src/os.erl14
-rw-r--r--lib/kernel/test/os_SUITE.erl19
-rw-r--r--lib/kernel/test/os_SUITE_data/Makefile.src8
-rw-r--r--lib/kernel/test/os_SUITE_data/my_fds.c9
10 files changed, 71 insertions, 22 deletions
diff --git a/erts/doc/src/epmd.xml b/erts/doc/src/epmd.xml
index 120ffb6860..311483022d 100644
--- a/erts/doc/src/epmd.xml
+++ b/erts/doc/src/epmd.xml
@@ -34,24 +34,23 @@
</header>
<com>epmd</com>
- <comsummary>
- <p>Erlang Port Mapper Daemon</p>
+ <comsummary>Erlang Port Mapper Daemon</comsummary>
+
+ <description>
<taglist>
<tag><c><![CDATA[epmd [-d|-debug] [DbgExtra...] [-address Addresses]
- [-port No] [-daemon] [-relaxed_command_check]]]></c></tag>
+ [-port No] [-daemon] [-relaxed_command_check]]]></c></tag>
<item>
<p>Starts the port mapper daemon.</p>
</item>
<tag><c><![CDATA[epmd [-d|-debug] [-port No]
- [-names|-kill|-stop Name]]]></c></tag>
+ [-names|-kill|-stop Name]]]></c></tag>
<item>
<p>Communicates with a running port mapper daemon.</p>
</item>
</taglist>
- </comsummary>
- <description>
<p>This daemon acts as a name server on all hosts involved in
distributed Erlang computations. When an Erlang node starts,
the node has a name and it obtains an address from the host
diff --git a/erts/emulator/beam/erl_trace.c b/erts/emulator/beam/erl_trace.c
index f4d92564c1..8c84303997 100644
--- a/erts/emulator/beam/erl_trace.c
+++ b/erts/emulator/beam/erl_trace.c
@@ -3157,7 +3157,7 @@ erts_tracer_update(ErtsTracer *tracer, const ErtsTracer new_tracer)
Not sure if it is worth it, we save 4 words (sizeof(ErlHeapFragment))
per tracer. */
Eterm *hp = erts_alloc(ERTS_ALC_T_HEAP_FRAG,
- 2*sizeof(Eterm) + sizeof(ErtsThrPrgrLaterOp));
+ 3*sizeof(Eterm) + sizeof(ErtsThrPrgrLaterOp));
*tracer = CONS(hp, ERTS_TRACER_MODULE(new_tracer),
ERTS_TRACER_STATE(new_tracer));
} else {
diff --git a/erts/emulator/sys/unix/erl_child_setup.c b/erts/emulator/sys/unix/erl_child_setup.c
index 6b9ddd8da4..69fc6c2879 100644
--- a/erts/emulator/sys/unix/erl_child_setup.c
+++ b/erts/emulator/sys/unix/erl_child_setup.c
@@ -348,7 +348,7 @@ child_error:
* for posterity. */
static void handle_sigchld(int sig) {
- int buff[2], res;
+ int buff[2], res, __preverrno = errno;
sys_sigblock(SIGCHLD);
@@ -362,6 +362,16 @@ static void handle_sigchld(int sig) {
}
sys_sigrelease(SIGCHLD);
+
+ /* We save and restore the original errno as otherwise
+ the thread we are running in may end up with an
+ unexpected errno. An example of when this happened
+ was when the select in main had gotten an EINTR but
+ before the errno was checked the signal handler
+ was called and set errno to ECHILD from waitpid
+ which caused erl_child_setup to abort as it does
+ not expect ECHILD to be set after select */
+ errno = __preverrno;
}
#if defined(__ANDROID__)
@@ -423,7 +433,7 @@ main(int argc, char *argv[])
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART | SA_NOCLDSTOP;
if (sigaction(SIGCHLD, &sa, 0) == -1) {
- perror(0);
+ perror(NULL);
exit(1);
}
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index 6fb86f6dda..089efec3e8 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -715,11 +715,13 @@ static RETSIGTYPE suspend_signal(void)
static RETSIGTYPE suspend_signal(int signum)
#endif
{
- int res;
- int buf[1];
- do {
- res = read(sig_suspend_fds[0], buf, sizeof(int));
- } while (res < 0 && errno == EINTR);
+ int res, buf[1], __errno = errno;
+ do {
+ res = read(sig_suspend_fds[0], buf, sizeof(int));
+ } while (res < 0 && errno == EINTR);
+
+ /* restore previous errno in case read changed it */
+ errno = __errno;
}
#endif /* #ifdef ERTS_SYS_SUSPEND_SIGNAL */
diff --git a/lib/common_test/test_server/ts_run.erl b/lib/common_test/test_server/ts_run.erl
index 66db1ff9a7..82ae44ec06 100644
--- a/lib/common_test/test_server/ts_run.erl
+++ b/lib/common_test/test_server/ts_run.erl
@@ -258,7 +258,7 @@ make_command(Vars, Spec, State) ->
run_batch(Vars, _Spec, State) ->
process_flag(trap_exit, true),
- Command = State#state.command ++ " -noinput -s erlang halt",
+ Command = State#state.command ++ " -noinput -eval \"erlang:halt(0,[{flush,false}]).\"",
ts_lib:progress(Vars, 1, "Command: ~ts~n", [Command]),
io:format(user, "Command: ~ts~n",[Command]),
Port = open_port({spawn, Command}, [stream, in, eof, exit_status]),
diff --git a/lib/kernel/doc/src/file.xml b/lib/kernel/doc/src/file.xml
index d734ee25b8..09497482cf 100644
--- a/lib/kernel/doc/src/file.xml
+++ b/lib/kernel/doc/src/file.xml
@@ -79,7 +79,7 @@
<seealso marker="#list_dir_all"><c>list_dir_all/1</c></seealso> and
<seealso marker="#read_link_all"><c>read_link_all/1</c></seealso>.</p>
- <p>See also section <seealso marker="stdlib:unicode_usage#notes-about-raw-filenames">Notes About Raw Filenames</seealso> in the STDLIB User´s Giude.</p>
+ <p>See also section <seealso marker="stdlib:unicode_usage#notes-about-raw-filenames">Notes About Raw Filenames</seealso> in the STDLIB User's Guide.</p>
</description>
diff --git a/lib/kernel/src/os.erl b/lib/kernel/src/os.erl
index 05bbf1069e..f8519d3a5e 100644
--- a/lib/kernel/src/os.erl
+++ b/lib/kernel/src/os.erl
@@ -254,7 +254,19 @@ mk_cmd(_,Cmd) ->
{"/bin/sh -s unix:cmd", [out],
%% We insert a new line after the command, in case the command
%% contains a comment character.
- ["(", unicode:characters_to_binary(Cmd), "\n); echo \"\^D\"\n"],
+ %%
+ %% The </dev/null closes stdin, which means that programs
+ %% that use a closed stdin as an termination indicator works.
+ %% An example of such a program is 'more'.
+ %%
+ %% The "echo ^D" is used to indicate that the program has executed
+ %% and we should return any output we have gotten. We cannot use
+ %% termination of the child or closing of stdin/stdout as then
+ %% starting background jobs from os:cmd will block os:cmd.
+ %%
+ %% I tried changing this to be "better", but got bombarded with
+ %% backwards incompatibility bug reports, so leave this as it is.
+ ["(", unicode:characters_to_binary(Cmd), "\n) </dev/null; echo \"\^D\"\n"],
<<$\^D>>}.
validate(Atom) when is_atom(Atom) ->
diff --git a/lib/kernel/test/os_SUITE.erl b/lib/kernel/test/os_SUITE.erl
index 19ab3713a1..e76d6ec482 100644
--- a/lib/kernel/test/os_SUITE.erl
+++ b/lib/kernel/test/os_SUITE.erl
@@ -25,7 +25,7 @@
-export([space_in_cwd/1, quoting/1, cmd_unicode/1, space_in_name/1, bad_command/1,
find_executable/1, unix_comment_in_command/1, deep_list_command/1,
large_output_command/1, background_command/0, background_command/1,
- message_leak/1, perf_counter_api/1]).
+ message_leak/1, close_stdin/0, close_stdin/1, perf_counter_api/1]).
-include_lib("common_test/include/ct.hrl").
@@ -37,7 +37,7 @@ all() ->
[space_in_cwd, quoting, cmd_unicode, space_in_name, bad_command,
find_executable, unix_comment_in_command, deep_list_command,
large_output_command, background_command, message_leak,
- perf_counter_api].
+ close_stdin, perf_counter_api].
groups() ->
[].
@@ -54,7 +54,8 @@ init_per_group(_GroupName, Config) ->
end_per_group(_GroupName, Config) ->
Config.
-init_per_testcase(background_command, Config) ->
+init_per_testcase(TC, Config)
+ when TC =:= background_command; TC =:= close_stdin ->
case os:type() of
{win32, _} ->
{skip,"Should not work on windows"};
@@ -294,7 +295,7 @@ message_leak(_Config) ->
case os:type() of
{unix, _} ->
- os:cmd("while true; do echo hello; done&"),
+ os:cmd("for i in $(seq 1 100); do echo hello; done&"),
[] = receive_all();
_ ->
ok % Cannot background on non-unix
@@ -302,6 +303,16 @@ message_leak(_Config) ->
process_flag(trap_exit, false).
+%% Test that os:cmd closes stdin of the program that is executed
+close_stdin() ->
+ [{timetrap, {seconds, 5}}].
+close_stdin(Config) ->
+ DataDir = proplists:get_value(data_dir, Config),
+ Fds = filename:join(DataDir, "my_fds"),
+
+ "-1" = os:cmd(Fds).
+
+
%% Test that the os:perf_counter api works as expected
perf_counter_api(_Config) ->
diff --git a/lib/kernel/test/os_SUITE_data/Makefile.src b/lib/kernel/test/os_SUITE_data/Makefile.src
index 912d0cbcb1..f83f781411 100644
--- a/lib/kernel/test/os_SUITE_data/Makefile.src
+++ b/lib/kernel/test/os_SUITE_data/Makefile.src
@@ -3,7 +3,7 @@ LD = @LD@
CFLAGS = @CFLAGS@ -I@erl_include@ @DEFS@
CROSSLDFLAGS = @CROSSLDFLAGS@
-PROGS = my_echo@exe@
+PROGS = my_echo@exe@ my_fds@exe@
all: $(PROGS)
@@ -12,3 +12,9 @@ my_echo@exe@: my_echo@obj@
my_echo@obj@: my_echo.c
$(CC) -c -o my_echo@obj@ $(CFLAGS) my_echo.c
+
+my_fds@exe@: my_fds@obj@
+ $(LD) $(CROSSLDFLAGS) -o my_fds my_fds@obj@ @LIBS@
+
+my_fds@obj@: my_fds.c
+ $(CC) -c -o my_fds@obj@ $(CFLAGS) my_fds.c
diff --git a/lib/kernel/test/os_SUITE_data/my_fds.c b/lib/kernel/test/os_SUITE_data/my_fds.c
new file mode 100644
index 0000000000..704a4d1e1d
--- /dev/null
+++ b/lib/kernel/test/os_SUITE_data/my_fds.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+
+int
+main(int argc, char** argv)
+{
+ char buff[1];
+ int res = read(stdin, buff, 1);
+ printf("%d", res);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-05 05:25:26 +0000