cosmopolitan/test/libc/stdio/popen_test.c

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/dce.h"
#include "libc/fmt/fmt.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/testlib.h"

FILE *f;
char buf[32];
char testlib_enable_tmp_setup_teardown;

TEST(popen, command) {
  char foo[6];
  testlib_extract("/zip/echo.com", "echo.com", 0755);
  ASSERT_NE(NULL, (f = popen("./echo.com hello", "r")));
  ASSERT_NE(NULL, fgets(foo, sizeof(foo), f));
  ASSERT_STREQ("hello", foo);
  ASSERT_EQ(0, pclose(f));
}

TEST(popen, semicolon) {
  ASSERT_NE(NULL, (f = popen("echo hello;echo there", "r")));
  ASSERT_STREQ("hello\n", fgets(buf, sizeof(buf), f));
  ASSERT_STREQ("there\n", fgets(buf, sizeof(buf), f));
  ASSERT_EQ(0, pclose(f));
}

TEST(popen, singleQuotes) {
  setenv("there", "a b c", true);
  ASSERT_NE(NULL, (f = popen("echo -l 'hello $there' yo", "r")));
  ASSERT_STREQ("hello $there\n", fgets(buf, sizeof(buf), f));
  ASSERT_STREQ("yo\n", fgets(buf, sizeof(buf), f));
  ASSERT_EQ(0, pclose(f));
}

TEST(popen, doubleQuotes) {
  setenv("hello", "a b c", true);
  ASSERT_NE(NULL, (f = popen("echo -l \"$hello there\"", "r")));
  ASSERT_STREQ("a b c there\n", fgets(buf, sizeof(buf), f));
  ASSERT_EQ(0, pclose(f));
}

TEST(popen, quoteless) {
  setenv("there", "a b c", true);
  ASSERT_NE(NULL, (f = popen("echo -l hello a$there yo", "r")));
  ASSERT_STREQ("hello\n", fgets(buf, sizeof(buf), f));
  ASSERT_STREQ("aa b c\n", fgets(buf, sizeof(buf), f));  // mixed feelings
  ASSERT_STREQ("yo\n", fgets(buf, sizeof(buf), f));
  ASSERT_EQ(0, pclose(f));
}

TEST(popen, pipe) {
  setenv("there", "a b c", true);
  ASSERT_NE(NULL, (f = popen("echo hello | toupper", "r")));
  ASSERT_STREQ("HELLO\n", fgets(buf, sizeof(buf), f));
  ASSERT_EQ(0, pclose(f));
}

sig_atomic_t gotsig;

void OnSig(int sig) {
  gotsig = 1;
}

TEST(popen, complicated) {
  if (IsWindows()) return;  // windows treats sigusr1 as terminate
  char cmd[64];
  signal(SIGUSR1, OnSig);
  sprintf(cmd, "read a ; test \"x$a\" = xhello && kill -USR1 %d", getpid());
  ASSERT_NE(NULL, (f = popen(cmd, "w")));
  ASSERT_GE(fputs("hello", f), 0);
  ASSERT_EQ(0, pclose(f));
  ASSERT_EQ(1, gotsig);
  signal(SIGUSR1, SIG_DFL);
}