Merge branch 'main' into find2fdfind2fd

1 files changed, 197 insertions, 0 deletions

diff --git a/tests/xspawn.c b/tests/xspawn.c
new file mode 100644
index 0000000..785ea48
--- /dev/null
+++ b/tests/xspawn.c
@@ -0,0 +1,197 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include "prelude.h"
+#include "tests.h"
+#include "alloc.h"
+#include "bfstd.h"
+#include "dstring.h"
+#include "xspawn.h"
+#include <stdlib.h>
+#include <string.h>
+#include <sys/wait.h>
+
+/** Duplicate the current environment. */
+static char **envdup(void) {
+	extern char **environ;
+
+	char **envp = NULL;
+	size_t envc = 0;
+
+	for (char **var = environ; ; ++var) {
+		char *copy = NULL;
+		if (*var) {
+			copy = strdup(*var);
+			if (!copy) {
+				goto fail;
+			}
+		}
+
+		char **dest = RESERVE(char *, &envp, &envc);
+		if (!dest) {
+			free(copy);
+			goto fail;
+		}
+		*dest = copy;
+
+		if (!*var) {
+			break;
+		}
+	}
+
+	return envp;
+
+fail:
+	for (size_t i = 0; i < envc; ++i) {
+		free(envp[i]);
+	}
+	free(envp);
+	return NULL;
+}
+
+/** Check that we resolve executables in $PATH correctly. */
+static bool check_use_path(bool use_posix) {
+	bool ret = true;
+
+	struct bfs_spawn spawn;
+	ret &= bfs_pcheck(bfs_spawn_init(&spawn) == 0);
+	if (!ret) {
+		goto out;
+	}
+
+	spawn.flags |= BFS_SPAWN_USE_PATH;
+	if (!use_posix) {
+		spawn.flags &= ~BFS_SPAWN_USE_POSIX;
+	}
+
+	ret &= bfs_pcheck(bfs_spawn_addopen(&spawn, 10, "bin", O_RDONLY | O_DIRECTORY, 0) == 0);
+	ret &= bfs_pcheck(bfs_spawn_adddup2(&spawn, 10, 11) == 0);
+	ret &= bfs_pcheck(bfs_spawn_addclose(&spawn, 10) == 0);
+	ret &= bfs_pcheck(bfs_spawn_addfchdir(&spawn, 11) == 0);
+	ret &= bfs_pcheck(bfs_spawn_addclose(&spawn, 11) == 0);
+	if (!ret) {
+		goto destroy;
+	}
+
+	// Check that $PATH is resolved in the parent's environment
+	char **envp;
+	ret &= bfs_pcheck(envp = envdup());
+	if (!ret) {
+		goto destroy;
+	}
+
+	// Check that $PATH is resolved after the file actions
+	char *old_path = getenv("PATH");
+	dchar *new_path = NULL;
+	if (old_path) {
+		ret &= bfs_pcheck(old_path = strdup(old_path));
+		if (!ret) {
+			goto env;
+		}
+		new_path = dstrprintf("tests:%s", old_path);
+	} else {
+		new_path = dstrdup("tests");
+	}
+	ret &= bfs_check(new_path);
+	if (!ret) {
+		goto path;
+	}
+
+	ret &= bfs_pcheck(setenv("PATH", new_path, true) == 0);
+	if (!ret) {
+		goto path;
+	}
+
+	char *argv[] = {"xspawnee", old_path, NULL};
+	pid_t pid = bfs_spawn("xspawnee", &spawn, argv, envp);
+	ret &= bfs_pcheck(pid >= 0, "bfs_spawn()");
+	if (!ret) {
+		goto unset;
+	}
+
+	int wstatus;
+	ret &= bfs_pcheck(xwaitpid(pid, &wstatus, 0) == pid)
+		&& bfs_check(WIFEXITED(wstatus));
+	if (ret) {
+		int wexit = WEXITSTATUS(wstatus);
+		ret &= bfs_check(wexit == EXIT_SUCCESS, "xspawnee: exit(%d)", wexit);
+	}
+
+unset:
+	if (old_path) {
+		ret &= bfs_pcheck(setenv("PATH", old_path, true) == 0);
+	} else {
+		ret &= bfs_pcheck(unsetenv("PATH") == 0);
+	}
+path:
+	dstrfree(new_path);
+	free(old_path);
+env:
+	for (char **var = envp; *var; ++var) {
+		free(*var);
+	}
+	free(envp);
+destroy:
+	ret &= bfs_pcheck(bfs_spawn_destroy(&spawn) == 0);
+out:
+	return ret;
+}
+
+/** Check path resolution of non-existent executables. */
+static bool check_enoent(bool use_posix) {
+	bool ret = true;
+
+	struct bfs_spawn spawn;
+	ret &= bfs_pcheck(bfs_spawn_init(&spawn) == 0);
+	if (!ret) {
+		goto out;
+	}
+
+	spawn.flags |= BFS_SPAWN_USE_PATH;
+	if (!use_posix) {
+		spawn.flags &= ~BFS_SPAWN_USE_POSIX;
+	}
+
+	char *argv[] = {"eW6f5RM9Qi", NULL};
+	pid_t pid = bfs_spawn("eW6f5RM9Qi", &spawn, argv, NULL);
+	ret &= bfs_pcheck(pid < 0 && errno == ENOENT, "bfs_spawn()");
+
+	ret &= bfs_pcheck(bfs_spawn_destroy(&spawn) == 0);
+out:
+	return ret;
+}
+
+static bool check_resolve(void) {
+	bool ret = true;
+	char *exe;
+
+	exe = bfs_spawn_resolve("sh");
+	ret &= bfs_pcheck(exe, "bfs_spawn_resolve('sh')");
+	free(exe);
+
+	exe = bfs_spawn_resolve("/bin/sh");
+	ret &= bfs_pcheck(exe && strcmp(exe, "/bin/sh") == 0);
+	free(exe);
+
+	exe = bfs_spawn_resolve("bin/tests/xspawnee");
+	ret &= bfs_pcheck(exe && strcmp(exe, "bin/tests/xspawnee") == 0);
+	free(exe);
+
+	ret &= bfs_pcheck(!bfs_spawn_resolve("eW6f5RM9Qi") && errno == ENOENT);
+
+	return ret;
+}
+
+bool check_xspawn(void) {
+	bool ret = true;
+
+	ret &= check_use_path(true);
+	ret &= check_use_path(false);
+
+	ret &= check_enoent(true);
+	ret &= check_enoent(false);
+
+	ret &= check_resolve();
+
+	return ret;
+}