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// 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_echeck(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_echeck(bfs_spawn_addopen(&spawn, 10, "bin", O_RDONLY | O_DIRECTORY, 0) == 0);
ret &= bfs_echeck(bfs_spawn_adddup2(&spawn, 10, 11) == 0);
ret &= bfs_echeck(bfs_spawn_addclose(&spawn, 10) == 0);
ret &= bfs_echeck(bfs_spawn_addfchdir(&spawn, 11) == 0);
ret &= bfs_echeck(bfs_spawn_addclose(&spawn, 11) == 0);
if (!ret) {
goto destroy;
}
// Check that $PATH is resolved in the parent's environment
char **envp;
ret &= bfs_echeck(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_echeck(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_echeck(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_echeck(pid >= 0, "bfs_spawn()");
if (!ret) {
goto unset;
}
int wstatus;
ret &= bfs_echeck(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_echeck(setenv("PATH", old_path, true) == 0);
} else {
ret &= bfs_echeck(unsetenv("PATH") == 0);
}
path:
dstrfree(new_path);
free(old_path);
env:
for (char **var = envp; *var; ++var) {
free(*var);
}
free(envp);
destroy:
ret &= bfs_echeck(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_echeck(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_echeck(pid < 0 && errno == ENOENT, "bfs_spawn()");
ret &= bfs_echeck(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_echeck(exe, "bfs_spawn_resolve('sh')");
free(exe);
exe = bfs_spawn_resolve("/bin/sh");
ret &= bfs_echeck(exe && strcmp(exe, "/bin/sh") == 0);
free(exe);
exe = bfs_spawn_resolve("bin/tests/xspawnee");
ret &= bfs_echeck(exe && strcmp(exe, "bin/tests/xspawnee") == 0);
free(exe);
ret &= bfs_echeck(!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;
}
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