1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #include <linux/string.h> 5 #include <termios.h> 6 #include <sys/ioctl.h> 7 #include <sys/types.h> 8 #include <sys/stat.h> 9 #include <unistd.h> 10 #include <dirent.h> 11 #include "subcmd-util.h" 12 #include "help.h" 13 #include "exec-cmd.h" 14 15 void add_cmdname(struct cmdnames *cmds, const char *name, size_t len) 16 { 17 struct cmdname *ent = malloc(sizeof(*ent) + len + 1); 18 19 ent->len = len; 20 memcpy(ent->name, name, len); 21 ent->name[len] = 0; 22 23 ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc); 24 cmds->names[cmds->cnt++] = ent; 25 } 26 27 void clean_cmdnames(struct cmdnames *cmds) 28 { 29 unsigned int i; 30 31 for (i = 0; i < cmds->cnt; ++i) 32 zfree(&cmds->names[i]); 33 zfree(&cmds->names); 34 cmds->cnt = 0; 35 cmds->alloc = 0; 36 } 37 38 int cmdname_compare(const void *a_, const void *b_) 39 { 40 struct cmdname *a = *(struct cmdname **)a_; 41 struct cmdname *b = *(struct cmdname **)b_; 42 return strcmp(a->name, b->name); 43 } 44 45 void uniq(struct cmdnames *cmds) 46 { 47 unsigned int i, j; 48 49 if (!cmds->cnt) 50 return; 51 52 for (i = j = 1; i < cmds->cnt; i++) 53 if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name)) 54 cmds->names[j++] = cmds->names[i]; 55 56 cmds->cnt = j; 57 } 58 59 void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes) 60 { 61 size_t ci, cj, ei; 62 int cmp; 63 64 ci = cj = ei = 0; 65 while (ci < cmds->cnt && ei < excludes->cnt) { 66 cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name); 67 if (cmp < 0) 68 cmds->names[cj++] = cmds->names[ci++]; 69 else if (cmp == 0) 70 ci++, ei++; 71 else if (cmp > 0) 72 ei++; 73 } 74 75 while (ci < cmds->cnt) 76 cmds->names[cj++] = cmds->names[ci++]; 77 78 cmds->cnt = cj; 79 } 80 81 static void get_term_dimensions(struct winsize *ws) 82 { 83 char *s = getenv("LINES"); 84 85 if (s != NULL) { 86 ws->ws_row = atoi(s); 87 s = getenv("COLUMNS"); 88 if (s != NULL) { 89 ws->ws_col = atoi(s); 90 if (ws->ws_row && ws->ws_col) 91 return; 92 } 93 } 94 #ifdef TIOCGWINSZ 95 if (ioctl(1, TIOCGWINSZ, ws) == 0 && 96 ws->ws_row && ws->ws_col) 97 return; 98 #endif 99 ws->ws_row = 25; 100 ws->ws_col = 80; 101 } 102 103 static void pretty_print_string_list(struct cmdnames *cmds, int longest) 104 { 105 int cols = 1, rows; 106 int space = longest + 1; /* min 1 SP between words */ 107 struct winsize win; 108 int max_cols; 109 int i, j; 110 111 get_term_dimensions(&win); 112 max_cols = win.ws_col - 1; /* don't print *on* the edge */ 113 114 if (space < max_cols) 115 cols = max_cols / space; 116 rows = (cmds->cnt + cols - 1) / cols; 117 118 for (i = 0; i < rows; i++) { 119 printf(" "); 120 121 for (j = 0; j < cols; j++) { 122 unsigned int n = j * rows + i; 123 unsigned int size = space; 124 125 if (n >= cmds->cnt) 126 break; 127 if (j == cols-1 || n + rows >= cmds->cnt) 128 size = 1; 129 printf("%-*s", size, cmds->names[n]->name); 130 } 131 putchar('\n'); 132 } 133 } 134 135 static int is_executable(const char *name) 136 { 137 struct stat st; 138 139 if (stat(name, &st) || /* stat, not lstat */ 140 !S_ISREG(st.st_mode)) 141 return 0; 142 143 return st.st_mode & S_IXUSR; 144 } 145 146 static int has_extension(const char *filename, const char *ext) 147 { 148 size_t len = strlen(filename); 149 size_t extlen = strlen(ext); 150 151 return len > extlen && !memcmp(filename + len - extlen, ext, extlen); 152 } 153 154 static void list_commands_in_dir(struct cmdnames *cmds, 155 const char *path, 156 const char *prefix) 157 { 158 int prefix_len; 159 DIR *dir = opendir(path); 160 struct dirent *de; 161 char *buf = NULL; 162 163 if (!dir) 164 return; 165 if (!prefix) 166 prefix = "perf-"; 167 prefix_len = strlen(prefix); 168 169 astrcatf(&buf, "%s/", path); 170 171 while ((de = readdir(dir)) != NULL) { 172 int entlen; 173 174 if (!strstarts(de->d_name, prefix)) 175 continue; 176 177 astrcat(&buf, de->d_name); 178 if (!is_executable(buf)) 179 continue; 180 181 entlen = strlen(de->d_name) - prefix_len; 182 if (has_extension(de->d_name, ".exe")) 183 entlen -= 4; 184 185 add_cmdname(cmds, de->d_name + prefix_len, entlen); 186 } 187 closedir(dir); 188 free(buf); 189 } 190 191 void load_command_list(const char *prefix, 192 struct cmdnames *main_cmds, 193 struct cmdnames *other_cmds) 194 { 195 const char *env_path = getenv("PATH"); 196 char *exec_path = get_argv_exec_path(); 197 198 if (exec_path) { 199 list_commands_in_dir(main_cmds, exec_path, prefix); 200 qsort(main_cmds->names, main_cmds->cnt, 201 sizeof(*main_cmds->names), cmdname_compare); 202 uniq(main_cmds); 203 } 204 205 if (env_path) { 206 char *paths, *path, *colon; 207 path = paths = strdup(env_path); 208 while (1) { 209 if ((colon = strchr(path, ':'))) 210 *colon = 0; 211 if (!exec_path || strcmp(path, exec_path)) 212 list_commands_in_dir(other_cmds, path, prefix); 213 214 if (!colon) 215 break; 216 path = colon + 1; 217 } 218 free(paths); 219 220 qsort(other_cmds->names, other_cmds->cnt, 221 sizeof(*other_cmds->names), cmdname_compare); 222 uniq(other_cmds); 223 } 224 free(exec_path); 225 exclude_cmds(other_cmds, main_cmds); 226 } 227 228 void list_commands(const char *title, struct cmdnames *main_cmds, 229 struct cmdnames *other_cmds) 230 { 231 unsigned int i, longest = 0; 232 233 for (i = 0; i < main_cmds->cnt; i++) 234 if (longest < main_cmds->names[i]->len) 235 longest = main_cmds->names[i]->len; 236 for (i = 0; i < other_cmds->cnt; i++) 237 if (longest < other_cmds->names[i]->len) 238 longest = other_cmds->names[i]->len; 239 240 if (main_cmds->cnt) { 241 char *exec_path = get_argv_exec_path(); 242 printf("available %s in '%s'\n", title, exec_path); 243 printf("----------------"); 244 mput_char('-', strlen(title) + strlen(exec_path)); 245 putchar('\n'); 246 pretty_print_string_list(main_cmds, longest); 247 putchar('\n'); 248 free(exec_path); 249 } 250 251 if (other_cmds->cnt) { 252 printf("%s available from elsewhere on your $PATH\n", title); 253 printf("---------------------------------------"); 254 mput_char('-', strlen(title)); 255 putchar('\n'); 256 pretty_print_string_list(other_cmds, longest); 257 putchar('\n'); 258 } 259 } 260 261 int is_in_cmdlist(struct cmdnames *c, const char *s) 262 { 263 unsigned int i; 264 265 for (i = 0; i < c->cnt; i++) 266 if (!strcmp(s, c->names[i]->name)) 267 return 1; 268 return 0; 269 } 270