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/* SPDX-License-Identifier: GPL-2.0 */
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/zalloc.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <subcmd/exec-cmd.h>
#include <subcmd/parse-options.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <api/io.h>
#include "builtin.h"
#include "tests-scripts.h"
#include "color.h"
#include "debug.h"
#include "hist.h"
#include "intlist.h"
#include "string2.h"
#include "symbol.h"
#include "tests.h"
#include "util/rlimit.h"
#include "util/util.h"
static int shell_tests__dir_fd(void)
{
char path[PATH_MAX], *exec_path;
static const char * const devel_dirs[] = { "./tools/perf/tests/shell", "./tests/shell", };
for (size_t i = 0; i < ARRAY_SIZE(devel_dirs); ++i) {
int fd = open(devel_dirs[i], O_PATH);
if (fd >= 0)
return fd;
}
/* Then installed path. */
exec_path = get_argv_exec_path();
scnprintf(path, sizeof(path), "%s/tests/shell", exec_path);
free(exec_path);
return open(path, O_PATH);
}
static char *shell_test__description(int dir_fd, const char *name)
{
struct io io;
char buf[128], desc[256];
int ch, pos = 0;
io__init(&io, openat(dir_fd, name, O_RDONLY), buf, sizeof(buf));
if (io.fd < 0)
return NULL;
/* Skip first line - should be #!/bin/sh Shebang */
if (io__get_char(&io) != '#')
goto err_out;
if (io__get_char(&io) != '!')
goto err_out;
do {
ch = io__get_char(&io);
if (ch < 0)
goto err_out;
} while (ch != '\n');
do {
ch = io__get_char(&io);
if (ch < 0)
goto err_out;
} while (ch == '#' || isspace(ch));
while (ch > 0 && ch != '\n') {
desc[pos++] = ch;
if (pos >= (int)sizeof(desc) - 1)
break;
ch = io__get_char(&io);
}
while (pos > 0 && isspace(desc[--pos]))
;
desc[++pos] = '\0';
close(io.fd);
return strdup(desc);
err_out:
close(io.fd);
return NULL;
}
/* Is this full file path a shell script */
static bool is_shell_script(int dir_fd, const char *path)
{
const char *ext;
ext = strrchr(path, '.');
if (!ext)
return false;
if (!strcmp(ext, ".sh")) { /* Has .sh extension */
if (faccessat(dir_fd, path, R_OK | X_OK, 0) == 0) /* Is executable */
return true;
}
return false;
}
/* Is this file in this dir a shell script (for test purposes) */
static bool is_test_script(int dir_fd, const char *name)
{
return is_shell_script(dir_fd, name);
}
/* Duplicate a string and fall over and die if we run out of memory */
static char *strdup_check(const char *str)
{
char *newstr;
newstr = strdup(str);
if (!newstr) {
pr_err("Out of memory while duplicating test script string\n");
abort();
}
return newstr;
}
static int shell_test__run(struct test_suite *test, int subtest __maybe_unused)
{
const char *file = test->priv;
int err;
char *cmd = NULL;
if (asprintf(&cmd, "%s%s", file, verbose ? " -v" : "") < 0)
return TEST_FAIL;
err = system(cmd);
free(cmd);
if (!err)
return TEST_OK;
return WEXITSTATUS(err) == 2 ? TEST_SKIP : TEST_FAIL;
}
static void append_script(int dir_fd, const char *name, char *desc,
struct test_suite ***result,
size_t *result_sz)
{
char filename[PATH_MAX], link[128];
struct test_suite *test_suite, **result_tmp;
struct test_case *tests;
size_t len;
snprintf(link, sizeof(link), "/proc/%d/fd/%d", getpid(), dir_fd);
len = readlink(link, filename, sizeof(filename));
if (len < 0) {
pr_err("Failed to readlink %s", link);
return;
}
filename[len++] = '/';
strcpy(&filename[len], name);
tests = calloc(2, sizeof(*tests));
if (!tests) {
pr_err("Out of memory while building script test suite list\n");
return;
}
tests[0].name = strdup_check(name);
tests[0].desc = strdup_check(desc);
tests[0].run_case = shell_test__run;
test_suite = zalloc(sizeof(*test_suite));
if (!test_suite) {
pr_err("Out of memory while building script test suite list\n");
free(tests);
return;
}
test_suite->desc = desc;
test_suite->test_cases = tests;
test_suite->priv = strdup_check(filename);
/* Realloc is good enough, though we could realloc by chunks, not that
* anyone will ever measure performance here */
result_tmp = realloc(*result, (*result_sz + 1) * sizeof(*result_tmp));
if (result_tmp == NULL) {
pr_err("Out of memory while building script test suite list\n");
free(tests);
free(test_suite);
return;
}
/* Add file to end and NULL terminate the struct array */
*result = result_tmp;
(*result)[*result_sz] = test_suite;
(*result_sz)++;
}
static void append_scripts_in_dir(int dir_fd,
struct test_suite ***result,
size_t *result_sz)
{
struct dirent **entlist;
struct dirent *ent;
int n_dirs, i;
/* List files, sorted by alpha */
n_dirs = scandirat(dir_fd, ".", &entlist, NULL, alphasort);
if (n_dirs == -1)
return;
for (i = 0; i < n_dirs && (ent = entlist[i]); i++) {
int fd;
if (ent->d_name[0] == '.')
continue; /* Skip hidden files */
if (is_test_script(dir_fd, ent->d_name)) { /* It's a test */
char *desc = shell_test__description(dir_fd, ent->d_name);
if (desc) /* It has a desc line - valid script */
append_script(dir_fd, ent->d_name, desc, result, result_sz);
continue;
}
if (ent->d_type != DT_DIR) {
struct stat st;
if (ent->d_type != DT_UNKNOWN)
continue;
fstatat(dir_fd, ent->d_name, &st, 0);
if (!S_ISDIR(st.st_mode))
continue;
}
fd = openat(dir_fd, ent->d_name, O_PATH);
append_scripts_in_dir(fd, result, result_sz);
}
for (i = 0; i < n_dirs; i++) /* Clean up */
zfree(&entlist[i]);
free(entlist);
}
struct test_suite **create_script_test_suites(void)
{
struct test_suite **result = NULL, **result_tmp;
size_t result_sz = 0;
int dir_fd = shell_tests__dir_fd(); /* Walk dir */
/*
* Append scripts if fd is good, otherwise return a NULL terminated zero
* length array.
*/
if (dir_fd >= 0)
append_scripts_in_dir(dir_fd, &result, &result_sz);
result_tmp = realloc(result, (result_sz + 1) * sizeof(*result_tmp));
if (result_tmp == NULL) {
pr_err("Out of memory while building script test suite list\n");
abort();
}
/* NULL terminate the test suite array. */
result = result_tmp;
result[result_sz] = NULL;
if (dir_fd >= 0)
close(dir_fd);
return result;
}
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