1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/string.h>
12 #include "subcmd-util.h"
16 void add_cmdname(struct cmdnames *cmds, const char *name, size_t len)
18 struct cmdname *ent = malloc(sizeof(*ent) + len + 1);
23 memcpy(ent->name, name, len);
26 ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc);
27 cmds->names[cmds->cnt++] = ent;
30 void clean_cmdnames(struct cmdnames *cmds)
34 for (i = 0; i < cmds->cnt; ++i)
35 zfree(&cmds->names[i]);
41 int cmdname_compare(const void *a_, const void *b_)
43 struct cmdname *a = *(struct cmdname **)a_;
44 struct cmdname *b = *(struct cmdname **)b_;
45 return strcmp(a->name, b->name);
48 void uniq(struct cmdnames *cmds)
55 for (i = j = 1; i < cmds->cnt; i++)
56 if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name))
57 cmds->names[j++] = cmds->names[i];
62 void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
68 while (ci < cmds->cnt && ei < excludes->cnt) {
69 cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);
71 zfree(&cmds->names[cj]);
72 cmds->names[cj++] = cmds->names[ci++];
73 } else if (cmp == 0) {
81 while (ci < cmds->cnt) {
82 zfree(&cmds->names[cj]);
83 cmds->names[cj++] = cmds->names[ci++];
85 for (ci = cj; ci < cmds->cnt; ci++)
86 zfree(&cmds->names[ci]);
90 static void get_term_dimensions(struct winsize *ws)
92 char *s = getenv("LINES");
96 s = getenv("COLUMNS");
99 if (ws->ws_row && ws->ws_col)
104 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
105 ws->ws_row && ws->ws_col)
112 static void pretty_print_string_list(struct cmdnames *cmds, int longest)
115 int space = longest + 1; /* min 1 SP between words */
120 get_term_dimensions(&win);
121 max_cols = win.ws_col - 1; /* don't print *on* the edge */
123 if (space < max_cols)
124 cols = max_cols / space;
125 rows = (cmds->cnt + cols - 1) / cols;
127 for (i = 0; i < rows; i++) {
130 for (j = 0; j < cols; j++) {
131 unsigned int n = j * rows + i;
132 unsigned int size = space;
136 if (j == cols-1 || n + rows >= cmds->cnt)
138 printf("%-*s", size, cmds->names[n]->name);
144 static int is_executable(const char *name)
148 if (stat(name, &st) || /* stat, not lstat */
149 !S_ISREG(st.st_mode))
152 return st.st_mode & S_IXUSR;
155 static int has_extension(const char *filename, const char *ext)
157 size_t len = strlen(filename);
158 size_t extlen = strlen(ext);
160 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
163 static void list_commands_in_dir(struct cmdnames *cmds,
168 DIR *dir = opendir(path);
176 prefix_len = strlen(prefix);
178 astrcatf(&buf, "%s/", path);
180 while ((de = readdir(dir)) != NULL) {
183 if (!strstarts(de->d_name, prefix))
186 astrcat(&buf, de->d_name);
187 if (!is_executable(buf))
190 entlen = strlen(de->d_name) - prefix_len;
191 if (has_extension(de->d_name, ".exe"))
194 add_cmdname(cmds, de->d_name + prefix_len, entlen);
200 void load_command_list(const char *prefix,
201 struct cmdnames *main_cmds,
202 struct cmdnames *other_cmds)
204 const char *env_path = getenv("PATH");
205 char *exec_path = get_argv_exec_path();
208 list_commands_in_dir(main_cmds, exec_path, prefix);
209 qsort(main_cmds->names, main_cmds->cnt,
210 sizeof(*main_cmds->names), cmdname_compare);
215 char *paths, *path, *colon;
216 path = paths = strdup(env_path);
218 if ((colon = strchr(path, ':')))
220 if (!exec_path || strcmp(path, exec_path))
221 list_commands_in_dir(other_cmds, path, prefix);
229 qsort(other_cmds->names, other_cmds->cnt,
230 sizeof(*other_cmds->names), cmdname_compare);
234 exclude_cmds(other_cmds, main_cmds);
237 void list_commands(const char *title, struct cmdnames *main_cmds,
238 struct cmdnames *other_cmds)
240 unsigned int i, longest = 0;
242 for (i = 0; i < main_cmds->cnt; i++)
243 if (longest < main_cmds->names[i]->len)
244 longest = main_cmds->names[i]->len;
245 for (i = 0; i < other_cmds->cnt; i++)
246 if (longest < other_cmds->names[i]->len)
247 longest = other_cmds->names[i]->len;
249 if (main_cmds->cnt) {
250 char *exec_path = get_argv_exec_path();
251 printf("available %s in '%s'\n", title, exec_path);
252 printf("----------------");
253 mput_char('-', strlen(title) + strlen(exec_path));
255 pretty_print_string_list(main_cmds, longest);
260 if (other_cmds->cnt) {
261 printf("%s available from elsewhere on your $PATH\n", title);
262 printf("---------------------------------------");
263 mput_char('-', strlen(title));
265 pretty_print_string_list(other_cmds, longest);
270 int is_in_cmdlist(struct cmdnames *c, const char *s)
274 for (i = 0; i < c->cnt; i++)
275 if (!strcmp(s, c->names[i]->name))