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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 "builtin.h"
#include "builtin-test-list.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"
/*
* As this is a singleton built once for the run of the process, there is
* no value in trying to free it and just let it stay around until process
* exits when it's cleaned up.
*/
static size_t files_num = 0;
static struct script_file *files = NULL;
static int files_max_width = 0;
static const char *shell_tests__dir(char *path, size_t size)
{
const char *devel_dirs[] = { "./tools/perf/tests", "./tests", };
char *exec_path;
unsigned int i;
for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) {
struct stat st;
if (!lstat(devel_dirs[i], &st)) {
scnprintf(path, size, "%s/shell", devel_dirs[i]);
if (!lstat(devel_dirs[i], &st))
return path;
}
}
/* Then installed path. */
exec_path = get_argv_exec_path();
scnprintf(path, size, "%s/tests/shell", exec_path);
free(exec_path);
return path;
}
static const char *shell_test__description(char *description, size_t size,
const char *path, const char *name)
{
FILE *fp;
char filename[PATH_MAX];
int ch;
path__join(filename, sizeof(filename), path, name);
fp = fopen(filename, "r");
if (!fp)
return NULL;
/* Skip first line - should be #!/bin/sh Shebang */
do {
ch = fgetc(fp);
} while (ch != EOF && ch != '\n');
description = fgets(description, size, fp);
fclose(fp);
/* Assume first char on line is omment everything after that desc */
return description ? strim(description + 1) : NULL;
}
/* Is this full file path a shell script */
static bool is_shell_script(const char *path)
{
const char *ext;
ext = strrchr(path, '.');
if (!ext)
return false;
if (!strcmp(ext, ".sh")) { /* Has .sh extension */
if (access(path, R_OK | X_OK) == 0) /* Is executable */
return true;
}
return false;
}
/* Is this file in this dir a shell script (for test purposes) */
static bool is_test_script(const char *path, const char *name)
{
char filename[PATH_MAX];
path__join(filename, sizeof(filename), path, name);
if (!is_shell_script(filename)) return false;
return true;
}
/* 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 void append_script(const char *dir, const char *file, const char *desc)
{
struct script_file *files_tmp;
size_t files_num_tmp;
int width;
files_num_tmp = files_num + 1;
if (files_num_tmp >= SIZE_MAX) {
pr_err("Too many script files\n");
abort();
}
/* Realloc is good enough, though we could realloc by chunks, not that
* anyone will ever measure performance here */
files_tmp = realloc(files,
(files_num_tmp + 1) * sizeof(struct script_file));
if (files_tmp == NULL) {
pr_err("Out of memory while building test list\n");
abort();
}
/* Add file to end and NULL terminate the struct array */
files = files_tmp;
files_num = files_num_tmp;
files[files_num - 1].dir = strdup_check(dir);
files[files_num - 1].file = strdup_check(file);
files[files_num - 1].desc = strdup_check(desc);
files[files_num].dir = NULL;
files[files_num].file = NULL;
files[files_num].desc = NULL;
width = strlen(desc); /* Track max width of desc */
if (width > files_max_width)
files_max_width = width;
}
static void append_scripts_in_dir(const char *path)
{
struct dirent **entlist;
struct dirent *ent;
int n_dirs, i;
char filename[PATH_MAX];
/* List files, sorted by alpha */
n_dirs = scandir(path, &entlist, NULL, alphasort);
if (n_dirs == -1)
return;
for (i = 0; i < n_dirs && (ent = entlist[i]); i++) {
if (ent->d_name[0] == '.')
continue; /* Skip hidden files */
if (is_test_script(path, ent->d_name)) { /* It's a test */
char bf[256];
const char *desc = shell_test__description
(bf, sizeof(bf), path, ent->d_name);
if (desc) /* It has a desc line - valid script */
append_script(path, ent->d_name, desc);
} else if (is_directory(path, ent)) { /* Scan the subdir */
path__join(filename, sizeof(filename),
path, ent->d_name);
append_scripts_in_dir(filename);
}
}
for (i = 0; i < n_dirs; i++) /* Clean up */
zfree(&entlist[i]);
free(entlist);
}
const struct script_file *list_script_files(void)
{
char path_dir[PATH_MAX];
const char *path;
if (files)
return files; /* Singleton - we already know our list */
path = shell_tests__dir(path_dir, sizeof(path_dir)); /* Walk dir */
append_scripts_in_dir(path);
return files;
}
int list_script_max_width(void)
{
list_script_files(); /* Ensure we have scanned all scripts */
return files_max_width;
}
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