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