#include "cache.h"#include "../builtin.h"#include "exec_cmd.h"#include "levenshtein.h"#include "help.h"#include <termios.h> void add_cmdname(struct cmdnames *cmds, const char *name, size_t len){	struct cmdname *ent = malloc(sizeof(*ent) + len + 1); 	ent->len = len;	memcpy(ent->name, name, len);	ent->name[len] = 0; 	ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc);	cmds->names[cmds->cnt++] = ent;} static void clean_cmdnames(struct cmdnames *cmds){	unsigned int i; 	for (i = 0; i < cmds->cnt; ++i)		free(cmds->names[i]);	free(cmds->names);	cmds->cnt = 0;	cmds->alloc = 0;} static int cmdname_compare(const void *a_, const void *b_){	struct cmdname *a = *(struct cmdname **)a_;	struct cmdname *b = *(struct cmdname **)b_;	return strcmp(a->name, b->name);} static void uniq(struct cmdnames *cmds){	unsigned int i, j; 	if (!cmds->cnt)		return; 	for (i = j = 1; i < cmds->cnt; i++)		if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name))			cmds->names[j++] = cmds->names[i]; 	cmds->cnt = j;} void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes){	size_t ci, cj, ei;	int cmp; 	ci = cj = ei = 0;	while (ci < cmds->cnt && ei < excludes->cnt) {		cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);		if (cmp < 0)			cmds->names[cj++] = cmds->names[ci++];		else if (cmp == 0)			ci++, ei++;		else if (cmp > 0)			ei++;	} 	while (ci < cmds->cnt)		cmds->names[cj++] = cmds->names[ci++]; 	cmds->cnt = cj;} static void pretty_print_string_list(struct cmdnames *cmds, int longest){	int cols = 1, rows;	int space = longest + 1; /* min 1 SP between words */	struct winsize win;	int max_cols;	int i, j; 	get_term_dimensions(&win);	max_cols = win.ws_col - 1; /* don't print *on* the edge */ 	if (space < max_cols)		cols = max_cols / space;	rows = (cmds->cnt + cols - 1) / cols; 	for (i = 0; i < rows; i++) {		printf("  "); 		for (j = 0; j < cols; j++) {			unsigned int n = j * rows + i;			unsigned int size = space; 			if (n >= cmds->cnt)				break;			if (j == cols-1 || n + rows >= cmds->cnt)				size = 1;			printf("%-*s", size, cmds->names[n]->name);		}		putchar('\n');	}} static int is_executable(const char *name){	struct stat st; 	if (stat(name, &st) || /* stat, not lstat */	    !S_ISREG(st.st_mode))		return 0; 	return st.st_mode & S_IXUSR;} static void list_commands_in_dir(struct cmdnames *cmds,					 const char *path,					 const char *prefix){	int prefix_len;	DIR *dir = opendir(path);	struct dirent *de;	struct strbuf buf = STRBUF_INIT;	int len; 	if (!dir)		return;	if (!prefix)		prefix = "perf-";	prefix_len = strlen(prefix); 	strbuf_addf(&buf, "%s/", path);	len = buf.len; 	while ((de = readdir(dir)) != NULL) {		int entlen; 		if (prefixcmp(de->d_name, prefix))			continue; 		strbuf_setlen(&buf, len);		strbuf_addstr(&buf, de->d_name);		if (!is_executable(buf.buf))			continue; 		entlen = strlen(de->d_name) - prefix_len;		if (has_extension(de->d_name, ".exe"))			entlen -= 4; 		add_cmdname(cmds, de->d_name + prefix_len, entlen);	}	closedir(dir);	strbuf_release(&buf);} void load_command_list(const char *prefix,		struct cmdnames *main_cmds,		struct cmdnames *other_cmds){	const char *env_path = getenv("PATH");	const char *exec_path = perf_exec_path(); 	if (exec_path) {		list_commands_in_dir(main_cmds, exec_path, prefix);		qsort(main_cmds->names, main_cmds->cnt,		      sizeof(*main_cmds->names), cmdname_compare);		uniq(main_cmds);	} 	if (env_path) {		char *paths, *path, *colon;		path = paths = strdup(env_path);		while (1) {			if ((colon = strchr(path, PATH_SEP)))				*colon = 0;			if (!exec_path || strcmp(path, exec_path))				list_commands_in_dir(other_cmds, path, prefix); 			if (!colon)				break;			path = colon + 1;		}		free(paths); 		qsort(other_cmds->names, other_cmds->cnt,		      sizeof(*other_cmds->names), cmdname_compare);		uniq(other_cmds);	}	exclude_cmds(other_cmds, main_cmds);} void list_commands(const char *title, struct cmdnames *main_cmds,		   struct cmdnames *other_cmds){	unsigned int i, longest = 0; 	for (i = 0; i < main_cmds->cnt; i++)		if (longest < main_cmds->names[i]->len)			longest = main_cmds->names[i]->len;	for (i = 0; i < other_cmds->cnt; i++)		if (longest < other_cmds->names[i]->len)			longest = other_cmds->names[i]->len; 	if (main_cmds->cnt) {		const char *exec_path = perf_exec_path();		printf("available %s in '%s'\n", title, exec_path);		printf("----------------");		mput_char('-', strlen(title) + strlen(exec_path));		putchar('\n');		pretty_print_string_list(main_cmds, longest);		putchar('\n');	} 	if (other_cmds->cnt) {		printf("%s available from elsewhere on your $PATH\n", title);		printf("---------------------------------------");		mput_char('-', strlen(title));		putchar('\n');		pretty_print_string_list(other_cmds, longest);		putchar('\n');	}} int is_in_cmdlist(struct cmdnames *c, const char *s){	unsigned int i; 	for (i = 0; i < c->cnt; i++)		if (!strcmp(s, c->names[i]->name))			return 1;	return 0;} static int autocorrect;static struct cmdnames aliases; static int perf_unknown_cmd_config(const char *var, const char *value, void *cb){	if (!strcmp(var, "help.autocorrect"))		autocorrect = perf_config_int(var,value);	/* Also use aliases for command lookup */	if (!prefixcmp(var, "alias."))		add_cmdname(&aliases, var + 6, strlen(var + 6)); 	return perf_default_config(var, value, cb);} static int levenshtein_compare(const void *p1, const void *p2){	const struct cmdname *const *c1 = p1, *const *c2 = p2;	const char *s1 = (*c1)->name, *s2 = (*c2)->name;	int l1 = (*c1)->len;	int l2 = (*c2)->len;	return l1 != l2 ? l1 - l2 : strcmp(s1, s2);} static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old){	unsigned int i; 	ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc); 	for (i = 0; i < old->cnt; i++)		cmds->names[cmds->cnt++] = old->names[i];	free(old->names);	old->cnt = 0;	old->names = NULL;} const char *help_unknown_cmd(const char *cmd){	unsigned int i, n = 0, best_similarity = 0;	struct cmdnames main_cmds, other_cmds; 	memset(&main_cmds, 0, sizeof(main_cmds));	memset(&other_cmds, 0, sizeof(main_cmds));	memset(&aliases, 0, sizeof(aliases)); 	perf_config(perf_unknown_cmd_config, NULL); 	load_command_list("perf-", &main_cmds, &other_cmds); 	add_cmd_list(&main_cmds, &aliases);	add_cmd_list(&main_cmds, &other_cmds);	qsort(main_cmds.names, main_cmds.cnt,	      sizeof(main_cmds.names), cmdname_compare);	uniq(&main_cmds); 	if (main_cmds.cnt) {		/* This reuses cmdname->len for similarity index */		for (i = 0; i < main_cmds.cnt; ++i)			main_cmds.names[i]->len =				levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4); 		qsort(main_cmds.names, main_cmds.cnt,		      sizeof(*main_cmds.names), levenshtein_compare); 		best_similarity = main_cmds.names[0]->len;		n = 1;		while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len)			++n;	} 	if (autocorrect && n == 1) {		const char *assumed = main_cmds.names[0]->name; 		main_cmds.names[0] = NULL;		clean_cmdnames(&main_cmds);		fprintf(stderr, "WARNING: You called a perf program named '%s', "			"which does not exist.\n"			"Continuing under the assumption that you meant '%s'\n",			cmd, assumed);		if (autocorrect > 0) {			fprintf(stderr, "in %0.1f seconds automatically...\n",				(float)autocorrect/10.0);			poll(NULL, 0, autocorrect * 100);		}		return assumed;	} 	fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd); 	if (main_cmds.cnt && best_similarity < 6) {		fprintf(stderr, "\nDid you mean %s?\n",			n < 2 ? "this": "one of these"); 		for (i = 0; i < n; i++)			fprintf(stderr, "\t%s\n", main_cmds.names[i]->name);	} 	exit(1);} int cmd_version(int argc __maybe_unused, const char **argv __maybe_unused,		const char *prefix __maybe_unused){	printf("perf version %s\n", perf_version_string);	return 0;}