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Improve system() / popen() builtin shell (#753)

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* cocmd: stop splitting redirect expressions
* cocmd: allow passing unpaired } for passing Perl test
* cocmd: propagate exit status from semicolon
This commit is contained in:
Gavin Hayes 2023-04-17 19:18:16 -04:00 • committed by GitHub
parent d5b8b644c2
commit d484e1dbd4
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 111 additions and 3 deletions
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102
test/libc/stdio/system_test.c
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@ -29,6 +29,8 @@
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
STATIC_YOINK("glob");
char testlib_enable_tmp_setup_teardown;
TEST(system, haveShell) {
@ -56,6 +58,43 @@ TEST(system, testStdoutRedirect_withSpacesInFilename) {
EXPECT_STREQ("hello\n", _gc(xslurp("hello there.txt", 0)));
}
TEST(system, testStderrRedirect_toStdout) {
int pipefd[2];
int stdoutBack = dup(1);
ASSERT_NE(-1, stdoutBack);
ASSERT_EQ(0, pipe(pipefd));
ASSERT_NE(-1, dup2(pipefd[1], 1));
int stderrBack = dup(2);
ASSERT_NE(-1, stderrBack);
char buf[5] = {0};
ASSERT_NE(-1, dup2(1, 2));
bool success = false;
if (WEXITSTATUS(system("echo aaa 2>&1")) == 0) {
success = read(pipefd[0], buf, sizeof(buf) - 1) == (sizeof(buf) - 1);
}
ASSERT_NE(-1, dup2(stderrBack, 2));
ASSERT_EQ(true, success);
ASSERT_STREQ("aaa\n", buf);
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
testlib_extract("/zip/echo.com", "echo.com", 0755);
ASSERT_NE(-1, dup2(1, 2));
success = false;
if (WEXITSTATUS(system("./echo.com aaa 2>&1")) == 0) {
success = read(pipefd[0], buf, sizeof(buf) - 1) == (sizeof(buf) - 1);
}
ASSERT_NE(-1, dup2(stderrBack, 2));
ASSERT_EQ(true, success);
ASSERT_STREQ("aaa\n", buf);
ASSERT_NE(-1, dup2(stdoutBack, 1));
ASSERT_EQ(0, close(pipefd[1]));
ASSERT_EQ(0, close(pipefd[0]));
}
BENCH(system, bench) {
testlib_extract("/zip/echo.com", "echo.com", 0755);
EZBENCH2("system cmd", donothing, system("./echo.com hi >/dev/null"));
@ -116,3 +155,66 @@ TEST(system, kill) {
int ws = system("kill -TERM $$; usleep");
if (!IsWindows()) ASSERT_EQ(SIGTERM, WTERMSIG(ws));
}
TEST(system, exitStatusPreservedAfterSemiColon) {
ASSERT_EQ(1, WEXITSTATUS(system("false;")));
ASSERT_EQ(1, WEXITSTATUS(system("false; ")));
if (!IsWindows() && !IsMetal()) {
ASSERT_EQ(1, WEXITSTATUS(system("/bin/false;")));
ASSERT_EQ(1, WEXITSTATUS(system("/bin/false;")));
}
int pipefd[2];
int stdoutBack = dup(1);
ASSERT_NE(-1, stdoutBack);
ASSERT_EQ(0, pipe(pipefd));
ASSERT_NE(-1, dup2(pipefd[1], 1));
ASSERT_EQ(0, WEXITSTATUS(system("false; echo $?")));
char buf[3] = {0};
ASSERT_EQ(2, read(pipefd[0], buf, 2));
ASSERT_STREQ("1\n", buf);
if (!IsWindows() && !IsMetal()) {
ASSERT_EQ(0, WEXITSTATUS(system("/bin/false; echo $?")));
buf[0] = 0;
buf[1] = 0;
ASSERT_EQ(2, read(pipefd[0], buf, 2));
ASSERT_STREQ("1\n", buf);
}
ASSERT_NE(-1, dup2(stdoutBack, 1));
ASSERT_EQ(0, close(pipefd[1]));
ASSERT_EQ(0, close(pipefd[0]));
}
TEST(system, allowsLoneCloseCurlyBrace) {
int pipefd[2];
int stdoutBack = dup(1);
ASSERT_NE(-1, stdoutBack);
ASSERT_EQ(0, pipe(pipefd));
ASSERT_NE(-1, dup2(pipefd[1], 1));
char buf[6] = {0};
ASSERT_EQ(0, WEXITSTATUS(system("echo \"aaa\"}")));
ASSERT_EQ(sizeof(buf) - 1, read(pipefd[0], buf, sizeof(buf) - 1));
ASSERT_STREQ("aaa}\n", buf);
buf[0] = 0;
buf[1] = 0;
buf[2] = 0;
buf[3] = 0;
buf[4] = 0;
testlib_extract("/zip/echo.com", "echo.com", 0755);
ASSERT_EQ(0, WEXITSTATUS(system("./echo.com \"aaa\"}")));
ASSERT_EQ(sizeof(buf) - 1, read(pipefd[0], buf, sizeof(buf) - 1));
ASSERT_STREQ("aaa}\n", buf);
ASSERT_NE(-1, dup2(stdoutBack, 1));
ASSERT_EQ(0, close(pipefd[1]));
ASSERT_EQ(0, close(pipefd[0]));
}
TEST(system, glob) {
testlib_extract("/zip/echo.com", "echo.com", 0755);
ASSERT_EQ(0, WEXITSTATUS(system("./ec*.com aaa")));
ASSERT_EQ(0, WEXITSTATUS(system("./ec?o.com aaa")));
}