1 #include "cache.h" 2 #include "../builtin.h" 3 #include "exec_cmd.h" 4 #include "levenshtein.h" 5 #include "help.h" 6 7 void add_cmdname(struct cmdnames *cmds, const char *name, size_t len) 8 { 9 struct cmdname *ent = malloc(sizeof(*ent) + len + 1); 10 11 ent->len = len; 12 memcpy(ent->name, name, len); 13 ent->name[len] = 0; 14 15 ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc); 16 cmds->names[cmds->cnt++] = ent; 17 } 18 19 static void clean_cmdnames(struct cmdnames *cmds) 20 { 21 unsigned int i; 22 23 for (i = 0; i < cmds->cnt; ++i) 24 free(cmds->names[i]); 25 free(cmds->names); 26 cmds->cnt = 0; 27 cmds->alloc = 0; 28 } 29 30 static int cmdname_compare(const void *a_, const void *b_) 31 { 32 struct cmdname *a = *(struct cmdname **)a_; 33 struct cmdname *b = *(struct cmdname **)b_; 34 return strcmp(a->name, b->name); 35 } 36 37 static void uniq(struct cmdnames *cmds) 38 { 39 unsigned int i, j; 40 41 if (!cmds->cnt) 42 return; 43 44 for (i = j = 1; i < cmds->cnt; i++) 45 if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name)) 46 cmds->names[j++] = cmds->names[i]; 47 48 cmds->cnt = j; 49 } 50 51 void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes) 52 { 53 size_t ci, cj, ei; 54 int cmp; 55 56 ci = cj = ei = 0; 57 while (ci < cmds->cnt && ei < excludes->cnt) { 58 cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name); 59 if (cmp < 0) 60 cmds->names[cj++] = cmds->names[ci++]; 61 else if (cmp == 0) 62 ci++, ei++; 63 else if (cmp > 0) 64 ei++; 65 } 66 67 while (ci < cmds->cnt) 68 cmds->names[cj++] = cmds->names[ci++]; 69 70 cmds->cnt = cj; 71 } 72 73 static void pretty_print_string_list(struct cmdnames *cmds, int longest) 74 { 75 int cols = 1, rows; 76 int space = longest + 1; /* min 1 SP between words */ 77 int max_cols; 78 int i, j; 79 /* ANDROID_CHANGE_BEGIN */ 80 #ifdef __BIONIC__ 81 max_cols = 75; 82 #else 83 struct winsize win; 84 85 get_term_dimensions(&win); 86 max_cols = win.ws_col - 1; /* don't print *on* the edge */ 87 #endif 88 /* ANDROID_CHANGE_END */ 89 90 if (space < max_cols) 91 cols = max_cols / space; 92 rows = (cmds->cnt + cols - 1) / cols; 93 94 for (i = 0; i < rows; i++) { 95 printf(" "); 96 97 for (j = 0; j < cols; j++) { 98 unsigned int n = j * rows + i; 99 unsigned int size = space; 100 101 if (n >= cmds->cnt) 102 break; 103 if (j == cols-1 || n + rows >= cmds->cnt) 104 size = 1; 105 printf("%-*s", size, cmds->names[n]->name); 106 } 107 putchar('\n'); 108 } 109 } 110 111 static int is_executable(const char *name) 112 { 113 struct stat st; 114 115 if (stat(name, &st) || /* stat, not lstat */ 116 !S_ISREG(st.st_mode)) 117 return 0; 118 119 return st.st_mode & S_IXUSR; 120 } 121 122 static void list_commands_in_dir(struct cmdnames *cmds, 123 const char *path, 124 const char *prefix) 125 { 126 int prefix_len; 127 DIR *dir = opendir(path); 128 struct dirent *de; 129 struct strbuf buf = STRBUF_INIT; 130 int len; 131 132 if (!dir) 133 return; 134 if (!prefix) 135 prefix = "perf-"; 136 prefix_len = strlen(prefix); 137 138 strbuf_addf(&buf, "%s/", path); 139 len = buf.len; 140 141 while ((de = readdir(dir)) != NULL) { 142 int entlen; 143 144 if (prefixcmp(de->d_name, prefix)) 145 continue; 146 147 strbuf_setlen(&buf, len); 148 strbuf_addstr(&buf, de->d_name); 149 if (!is_executable(buf.buf)) 150 continue; 151 152 entlen = strlen(de->d_name) - prefix_len; 153 if (has_extension(de->d_name, ".exe")) 154 entlen -= 4; 155 156 add_cmdname(cmds, de->d_name + prefix_len, entlen); 157 } 158 closedir(dir); 159 strbuf_release(&buf); 160 } 161 162 void load_command_list(const char *prefix, 163 struct cmdnames *main_cmds, 164 struct cmdnames *other_cmds) 165 { 166 const char *env_path = getenv("PATH"); 167 const char *exec_path = perf_exec_path(); 168 169 if (exec_path) { 170 list_commands_in_dir(main_cmds, exec_path, prefix); 171 qsort(main_cmds->names, main_cmds->cnt, 172 sizeof(*main_cmds->names), cmdname_compare); 173 uniq(main_cmds); 174 } 175 176 if (env_path) { 177 char *paths, *path, *colon; 178 path = paths = strdup(env_path); 179 while (1) { 180 if ((colon = strchr(path, PATH_SEP))) 181 *colon = 0; 182 if (!exec_path || strcmp(path, exec_path)) 183 list_commands_in_dir(other_cmds, path, prefix); 184 185 if (!colon) 186 break; 187 path = colon + 1; 188 } 189 free(paths); 190 191 qsort(other_cmds->names, other_cmds->cnt, 192 sizeof(*other_cmds->names), cmdname_compare); 193 uniq(other_cmds); 194 } 195 exclude_cmds(other_cmds, main_cmds); 196 } 197 198 void list_commands(const char *title, struct cmdnames *main_cmds, 199 struct cmdnames *other_cmds) 200 { 201 unsigned int i, longest = 0; 202 203 for (i = 0; i < main_cmds->cnt; i++) 204 if (longest < main_cmds->names[i]->len) 205 longest = main_cmds->names[i]->len; 206 for (i = 0; i < other_cmds->cnt; i++) 207 if (longest < other_cmds->names[i]->len) 208 longest = other_cmds->names[i]->len; 209 210 if (main_cmds->cnt) { 211 const char *exec_path = perf_exec_path(); 212 printf("available %s in '%s'\n", title, exec_path); 213 printf("----------------"); 214 mput_char('-', strlen(title) + strlen(exec_path)); 215 putchar('\n'); 216 pretty_print_string_list(main_cmds, longest); 217 putchar('\n'); 218 } 219 220 if (other_cmds->cnt) { 221 printf("%s available from elsewhere on your $PATH\n", title); 222 printf("---------------------------------------"); 223 mput_char('-', strlen(title)); 224 putchar('\n'); 225 pretty_print_string_list(other_cmds, longest); 226 putchar('\n'); 227 } 228 } 229 230 int is_in_cmdlist(struct cmdnames *c, const char *s) 231 { 232 unsigned int i; 233 234 for (i = 0; i < c->cnt; i++) 235 if (!strcmp(s, c->names[i]->name)) 236 return 1; 237 return 0; 238 } 239 240 static int autocorrect; 241 static struct cmdnames aliases; 242 243 static int perf_unknown_cmd_config(const char *var, const char *value, void *cb) 244 { 245 if (!strcmp(var, "help.autocorrect")) 246 autocorrect = perf_config_int(var,value); 247 /* Also use aliases for command lookup */ 248 if (!prefixcmp(var, "alias.")) 249 add_cmdname(&aliases, var + 6, strlen(var + 6)); 250 251 return perf_default_config(var, value, cb); 252 } 253 254 static int levenshtein_compare(const void *p1, const void *p2) 255 { 256 const struct cmdname *const *c1 = p1, *const *c2 = p2; 257 const char *s1 = (*c1)->name, *s2 = (*c2)->name; 258 int l1 = (*c1)->len; 259 int l2 = (*c2)->len; 260 return l1 != l2 ? l1 - l2 : strcmp(s1, s2); 261 } 262 263 static void add_cmd_list(struct cmdnames *cmds, struct cmdnames *old) 264 { 265 unsigned int i; 266 267 ALLOC_GROW(cmds->names, cmds->cnt + old->cnt, cmds->alloc); 268 269 for (i = 0; i < old->cnt; i++) 270 cmds->names[cmds->cnt++] = old->names[i]; 271 free(old->names); 272 old->cnt = 0; 273 old->names = NULL; 274 } 275 276 const char *help_unknown_cmd(const char *cmd) 277 { 278 unsigned int i, n = 0, best_similarity = 0; 279 struct cmdnames main_cmds, other_cmds; 280 281 memset(&main_cmds, 0, sizeof(main_cmds)); 282 memset(&other_cmds, 0, sizeof(main_cmds)); 283 memset(&aliases, 0, sizeof(aliases)); 284 285 perf_config(perf_unknown_cmd_config, NULL); 286 287 load_command_list("perf-", &main_cmds, &other_cmds); 288 289 add_cmd_list(&main_cmds, &aliases); 290 add_cmd_list(&main_cmds, &other_cmds); 291 qsort(main_cmds.names, main_cmds.cnt, 292 sizeof(main_cmds.names), cmdname_compare); 293 uniq(&main_cmds); 294 295 if (main_cmds.cnt) { 296 /* This reuses cmdname->len for similarity index */ 297 for (i = 0; i < main_cmds.cnt; ++i) 298 main_cmds.names[i]->len = 299 levenshtein(cmd, main_cmds.names[i]->name, 0, 2, 1, 4); 300 301 qsort(main_cmds.names, main_cmds.cnt, 302 sizeof(*main_cmds.names), levenshtein_compare); 303 304 best_similarity = main_cmds.names[0]->len; 305 n = 1; 306 while (n < main_cmds.cnt && best_similarity == main_cmds.names[n]->len) 307 ++n; 308 } 309 310 if (autocorrect && n == 1) { 311 const char *assumed = main_cmds.names[0]->name; 312 313 main_cmds.names[0] = NULL; 314 clean_cmdnames(&main_cmds); 315 fprintf(stderr, "WARNING: You called a perf program named '%s', " 316 "which does not exist.\n" 317 "Continuing under the assumption that you meant '%s'\n", 318 cmd, assumed); 319 if (autocorrect > 0) { 320 fprintf(stderr, "in %0.1f seconds automatically...\n", 321 (float)autocorrect/10.0); 322 poll(NULL, 0, autocorrect * 100); 323 } 324 return assumed; 325 } 326 327 fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd); 328 329 if (main_cmds.cnt && best_similarity < 6) { 330 fprintf(stderr, "\nDid you mean %s?\n", 331 n < 2 ? "this": "one of these"); 332 333 for (i = 0; i < n; i++) 334 fprintf(stderr, "\t%s\n", main_cmds.names[i]->name); 335 } 336 337 exit(1); 338 } 339 340 int cmd_version(int argc __used, const char **argv __used, const char *prefix __used) 341 { 342 printf("perf version %s\n", perf_version_string); 343 return 0; 344 } 345
