1 #include "cache.h" 2 #include "../builtin.h" 3 #include "exec_cmd.h" 4 #include "levenshtein.h" 5 #include "help.h" 6 #include <termios.h> 7 8 void add_cmdname(struct cmdnames *cmds, const char *name, size_t len) 9 { 10 struct cmdname *ent = malloc(sizeof(*ent) + len + 1); 11 12 ent->len = len; 13 memcpy(ent->name, name, len); 14 ent->name[len] = 0; 15 16 ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc); 17 cmds->names[cmds->cnt++] = ent; 18 } 19 20 static void clean_cmdnames(struct cmdnames *cmds) 21 { 22 unsigned int i; 23 24 for (i = 0; i < cmds->cnt; ++i) 25 free(cmds->names[i]); 26 free(cmds->names); 27 cmds->cnt = 0; 28 cmds->alloc = 0; 29 } 30 31 static int cmdname_compare(const void *a_, const void *b_) 32 { 33 struct cmdname *a = *(struct cmdname **)a_; 34 struct cmdname *b = *(struct cmdname **)b_; 35 return strcmp(a->name, b->name); 36 } 37 38 static void uniq(struct cmdnames *cmds) 39 { 40 unsigned int i, j; 41 42 if (!cmds->cnt) 43 return; 44 45 for (i = j = 1; i < cmds->cnt; i++) 46 if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name)) 47 cmds->names[j++] = cmds->names[i]; 48 49 cmds->cnt = j; 50 } 51 52 void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes) 53 { 54 size_t ci, cj, ei; 55 int cmp; 56 57 ci = cj = ei = 0; 58 while (ci < cmds->cnt && ei < excludes->cnt) { 59 cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name); 60 if (cmp < 0) 61 cmds->names[cj++] = cmds->names[ci++]; 62 else if (cmp == 0) 63 ci++, ei++; 64 else if (cmp > 0) 65 ei++; 66 } 67 68 while (ci < cmds->cnt) 69 cmds->names[cj++] = cmds->names[ci++]; 70 71 cmds->cnt = cj; 72 } 73 74 static void pretty_print_string_list(struct cmdnames *cmds, int longest) 75 { 76 int cols = 1, rows; 77 int space = longest + 1; /* min 1 SP between words */ 78 struct winsize win; 79 int max_cols; 80 int i, j; 81 82 get_term_dimensions(&win); 83 max_cols = win.ws_col - 1; /* don't print *on* the edge */ 84 85 if (space < max_cols) 86 cols = max_cols / space; 87 rows = (cmds->cnt + cols - 1) / cols; 88 89 for (i = 0; i < rows; i++) { 90 printf(" "); 91 92 for (j = 0; j < cols; j++) { 93 unsigned int n = j * rows + i; 94 unsigned int size = space; 95 96 if (n >= cmds->cnt) 97 break; 98 if (j == cols-1 || n + rows >= cmds->cnt) 99 size = 1; 100 printf("%-*s", size, cmds->names[n]->name); 101 } 102 putchar('\n'); 103 } 104 } 105 106 static int is_executable(const char *name) 107 { 108 struct stat st; 109 110 if (stat(name, &st) || /* stat, not lstat */ 111 !S_ISREG(st.st_mode)) 112 return 0; 113 114 return st.st_mode & S_IXUSR; 115 } 116 117 static void list_commands_in_dir(struct cmdnames *cmds, 118 const char *path, 119 const char *prefix) 120 { 121 int prefix_len; 122 DIR *dir = opendir(path); 123 struct dirent *de; 124 struct strbuf buf = STRBUF_INIT; 125 int len; 126 127 if (!dir) 128 return; 129 if (!prefix) 130 prefix = "perf-"; 131 prefix_len = strlen(prefix); 132 133 strbuf_addf(&buf, "%s/", path); 134 len = buf.len; 135 136 while ((de = readdir(dir)) != NULL) { 137 int entlen; 138 139 if (prefixcmp(de->d_name, prefix)) 140 continue; 141 142 strbuf_setlen(&buf, len); 143 strbuf_addstr(&buf, de->d_name); 144 if (!is_executable(buf.buf)) 145 continue; 146 147 entlen = strlen(de->d_name) - prefix_len; 148 if (has_extension(de->d_name, ".exe")) 149 entlen -= 4; 150 151 add_cmdname(cmds, de->d_name + prefix_len, entlen); 152 } 153 closedir(dir); 154 strbuf_release(&buf); 155 } 156 157 void load_command_list(const char *prefix, 158 struct cmdnames *main_cmds, 159 struct cmdnames *other_cmds) 160 { 161 const char *env_path = getenv("PATH"); 162 const char *exec_path = perf_exec_path(); 163 164 if (exec_path) { 165 list_commands_in_dir(main_cmds, exec_path, prefix); 166 qsort(main_cmds->names, main_cmds->cnt, 167 sizeof(*main_cmds->names), cmdname_compare); 168 uniq(main_cmds); 169 } 170 171 if (env_path) { 172 char *paths, *path, *colon; 173 path = paths = strdup(env_path); 174 while (1) { 175 if ((colon = strchr(path, PATH_SEP))) 176 *colon = 0; 177 if (!exec_path || strcmp(path, exec_path)) 178 list_commands_in_dir(other_cmds, path, prefix); 179 180 if (!colon) 181 break; 182 path = colon + 1; 183 } 184 free(paths); 185 186 qsort(other_cmds->names, other_cmds->cnt, 187 sizeof(*other_cmds->names), cmdname_compare); 188 uniq(other_cmds); 189 } 190 exclude_cmds(other_cmds, main_cmds); 191 } 192 193 void list_commands(const char *title, struct cmdnames *main_cmds, 194 struct cmdnames *other_cmds) 195 { 196 unsigned int i, longest = 0; 197 198 for (i = 0; i < main_cmds->cnt; i++) 199 if (longest < main_cmds->names[i]->len) 200 longest = main_cmds->names[i]->len; 201 for (i = 0; i < other_cmds->cnt; i++) 202 if (longest < other_cmds->names[i]->len) 203 longest = other_cmds->names[i]->len; 204 205 if (main_cmds->cnt) { 206 const char *exec_path = perf_exec_path(); 207 printf("available %s in '%s'\n", title, exec_path); 208 printf("----------------"); 209 mput_char('-', strlen(title) + strlen(exec_path)); 210 putchar('\n'); 211 pretty_print_string_list(main_cmds, longest); 212 putchar('\n'); 213 } 214 215 if (other_cmds->cnt) { 216 printf("%s available from elsewhere on your $PATH\n", title); 217 printf("---------------------------------------"); 218 mput_char('-', strlen(title)); 219 putchar('\n'); 220 pretty_print_string_list(other_cmds, longest); 221 putchar('\n'); 222 } 223 } 224 225 int is_in_cmdlist(struct cmdnames *c, const char *s) 226 { 227 unsigned int i; 228 229 for (i = 0; i < c->cnt; i++) 230 if (!strcmp(s, c->names[i]->name)) 231 return 1; 232 return 0; 233 } 234 235 static int autocorrect; 236 static struct cmdnames aliases; 237 238 static int perf_unknown_cmd_config(const char *var, const char *value, void *cb) 239 { 240 if (!strcmp(var, "help.autocorrect")) 241 autocorrect = perf_config_int(var,value); 242 /* Also use aliases for command lookup */ 243 if (!prefixcmp(var, "alias.")) 244 add_cmdname(&aliases, var + 6, strlen(var + 6)); 245 246 return perf_default_config(var, value, cb); 247 } 248 249 static int levenshtein_compare(const void *p1, const void *p2) 250 { 251 const struct cmdname *const *c1 = p1, *const *c2 = p2; 252 const char *s1 = (*c1)->name, *s2 = (*c2)->name; 253 int l1 = (*c1)->len; 254 int l2 = (*c2)->len; 255 return l1 != l2 ? l1 - l2 : strcmp(s1, s2); 256 } 257 258 static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) 259 { 260 unsigned int i; 261 262 ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc); 263 264 for (i = 0; i < old->cnt; i++) 265 cmds->names[cmds->cnt++] = old->names[i]; 266 free(old->names); 267 old->cnt = 0; 268 old->names = NULL; 269 } 270 271 const char *help_unknown_cmd(const char *cmd) 272 { 273 unsigned int i, n = 0, best_similarity = 0; 274 struct cmdnames main_cmds, other_cmds; 275 276 memset(&main_cmds, 0, sizeof(main_cmds)); 277 memset(&other_cmds, 0, sizeof(main_cmds)); 278 memset(&aliases, 0, sizeof(aliases)); 279 280 perf_config(perf_unknown_cmd_config, NULL); 281 282 load_command_list("perf-", &main_cmds, &other_cmds); 283 284 add_cmd_list(&main_cmds, &aliases); 285 add_cmd_list(&main_cmds, &other_cmds); 286 qsort(main_cmds.names, main_cmds.cnt, 287 sizeof(main_cmds.names), cmdname_compare); 288 uniq(&main_cmds); 289 290 if (main_cmds.cnt) { 291 /* This reuses cmdname->len for similarity index */ 292 for (i = 0; i < main_cmds.cnt; ++i) 293 main_cmds.names[i]->len = 294 levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4); 295 296 qsort(main_cmds.names, main_cmds.cnt, 297 sizeof(*main_cmds.names), levenshtein_compare); 298 299 best_similarity = main_cmds.names[0]->len; 300 n = 1; 301 while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len) 302 ++n; 303 } 304 305 if (autocorrect && n == 1) { 306 const char *assumed = main_cmds.names[0]->name; 307 308 main_cmds.names[0] = NULL; 309 clean_cmdnames(&main_cmds); 310 fprintf(stderr, "WARNING: You called a perf program named '%s', " 311 "which does not exist.\n" 312 "Continuing under the assumption that you meant '%s'\n", 313 cmd, assumed); 314 if (autocorrect > 0) { 315 fprintf(stderr, "in %0.1f seconds automatically...\n", 316 (float)autocorrect/10.0); 317 poll(NULL, 0, autocorrect * 100); 318 } 319 return assumed; 320 } 321 322 fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd); 323 324 if (main_cmds.cnt && best_similarity < 6) { 325 fprintf(stderr, "\nDid you mean %s?\n", 326 n < 2 ? "this": "one of these"); 327 328 for (i = 0; i < n; i++) 329 fprintf(stderr, "\t%s\n", main_cmds.names[i]->name); 330 } 331 332 exit(1); 333 } 334 335 int cmd_version(int argc __maybe_unused, const char **argv __maybe_unused, 336 const char *prefix __maybe_unused) 337 { 338 printf("perf version %s\n", perf_version_string); 339 return 0; 340 } 341
