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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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208 lines
5.1 KiB
C
208 lines
5.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#include <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <linux/ctype.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/zalloc.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <subcmd/exec-cmd.h>
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#include <subcmd/parse-options.h>
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#include <sys/wait.h>
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#include <sys/stat.h>
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#include "builtin.h"
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#include "builtin-test-list.h"
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#include "color.h"
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#include "debug.h"
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#include "hist.h"
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#include "intlist.h"
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#include "string2.h"
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#include "symbol.h"
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#include "tests.h"
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#include "util/rlimit.h"
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/*
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* As this is a singleton built once for the run of the process, there is
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* no value in trying to free it and just let it stay around until process
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* exits when it's cleaned up.
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*/
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static size_t files_num = 0;
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static struct script_file *files = NULL;
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static int files_max_width = 0;
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static const char *shell_tests__dir(char *path, size_t size)
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{
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const char *devel_dirs[] = { "./tools/perf/tests", "./tests", };
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char *exec_path;
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(devel_dirs); ++i) {
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struct stat st;
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if (!lstat(devel_dirs[i], &st)) {
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scnprintf(path, size, "%s/shell", devel_dirs[i]);
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if (!lstat(devel_dirs[i], &st))
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return path;
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}
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}
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/* Then installed path. */
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exec_path = get_argv_exec_path();
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scnprintf(path, size, "%s/tests/shell", exec_path);
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free(exec_path);
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return path;
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}
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static const char *shell_test__description(char *description, size_t size,
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const char *path, const char *name)
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{
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FILE *fp;
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char filename[PATH_MAX];
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int ch;
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path__join(filename, sizeof(filename), path, name);
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fp = fopen(filename, "r");
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if (!fp)
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return NULL;
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/* Skip first line - should be #!/bin/sh Shebang */
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do {
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ch = fgetc(fp);
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} while (ch != EOF && ch != '\n');
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description = fgets(description, size, fp);
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fclose(fp);
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/* Assume first char on line is omment everything after that desc */
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return description ? strim(description + 1) : NULL;
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}
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/* Is this full file path a shell script */
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static bool is_shell_script(const char *path)
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{
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const char *ext;
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ext = strrchr(path, '.');
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if (!ext)
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return false;
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if (!strcmp(ext, ".sh")) { /* Has .sh extension */
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if (access(path, R_OK | X_OK) == 0) /* Is executable */
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return true;
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}
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return false;
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}
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/* Is this file in this dir a shell script (for test purposes) */
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static bool is_test_script(const char *path, const char *name)
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{
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char filename[PATH_MAX];
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path__join(filename, sizeof(filename), path, name);
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if (!is_shell_script(filename)) return false;
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return true;
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}
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/* Duplicate a string and fall over and die if we run out of memory */
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static char *strdup_check(const char *str)
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{
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char *newstr;
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newstr = strdup(str);
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if (!newstr) {
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pr_err("Out of memory while duplicating test script string\n");
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abort();
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}
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return newstr;
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}
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static void append_script(const char *dir, const char *file, const char *desc)
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{
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struct script_file *files_tmp;
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size_t files_num_tmp;
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int width;
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files_num_tmp = files_num + 1;
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if (files_num_tmp >= SIZE_MAX) {
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pr_err("Too many script files\n");
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abort();
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}
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/* Realloc is good enough, though we could realloc by chunks, not that
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* anyone will ever measure performance here */
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files_tmp = realloc(files,
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(files_num_tmp + 1) * sizeof(struct script_file));
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if (files_tmp == NULL) {
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pr_err("Out of memory while building test list\n");
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abort();
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}
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/* Add file to end and NULL terminate the struct array */
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files = files_tmp;
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files_num = files_num_tmp;
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files[files_num - 1].dir = strdup_check(dir);
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files[files_num - 1].file = strdup_check(file);
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files[files_num - 1].desc = strdup_check(desc);
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files[files_num].dir = NULL;
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files[files_num].file = NULL;
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files[files_num].desc = NULL;
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width = strlen(desc); /* Track max width of desc */
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if (width > files_max_width)
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files_max_width = width;
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}
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static void append_scripts_in_dir(const char *path)
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{
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struct dirent **entlist;
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struct dirent *ent;
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int n_dirs, i;
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char filename[PATH_MAX];
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/* List files, sorted by alpha */
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n_dirs = scandir(path, &entlist, NULL, alphasort);
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if (n_dirs == -1)
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return;
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for (i = 0; i < n_dirs && (ent = entlist[i]); i++) {
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if (ent->d_name[0] == '.')
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continue; /* Skip hidden files */
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if (is_test_script(path, ent->d_name)) { /* It's a test */
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char bf[256];
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const char *desc = shell_test__description
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(bf, sizeof(bf), path, ent->d_name);
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if (desc) /* It has a desc line - valid script */
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append_script(path, ent->d_name, desc);
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} else if (is_directory(path, ent)) { /* Scan the subdir */
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path__join(filename, sizeof(filename),
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path, ent->d_name);
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append_scripts_in_dir(filename);
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}
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}
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for (i = 0; i < n_dirs; i++) /* Clean up */
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zfree(&entlist[i]);
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free(entlist);
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}
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const struct script_file *list_script_files(void)
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{
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char path_dir[PATH_MAX];
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const char *path;
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if (files)
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return files; /* Singleton - we already know our list */
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path = shell_tests__dir(path_dir, sizeof(path_dir)); /* Walk dir */
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append_scripts_in_dir(path);
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return files;
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}
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int list_script_max_width(void)
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{
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list_script_files(); /* Ensure we have scanned all scripts */
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return files_max_width;
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}
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