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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302// SPDX-License-Identifier: GPL-2.0#include <stdio.h>#include <stdlib.h>#include <string.h>#include <linux/string.h>#include <termios.h>#include <sys/ioctl.h>#include <sys/types.h>#include <sys/stat.h>#include <unistd.h>#include <dirent.h>#include <assert.h>#include "subcmd-util.h"#include "help.h"#include "exec-cmd.h"
void add_cmdname(struct cmdnames *cmds, const char *name, size_t len){ struct cmdname *ent = malloc(sizeof(*ent) + len + 1); if (!ent) return;
ent->len = len; memcpy(ent->name, name, len); ent->name[len] = 0;
ALLOC_GROW(cmds->names, cmds->cnt + 1, cmds->alloc); cmds->names[cmds->cnt++] = ent;}
void clean_cmdnames(struct cmdnames *cmds){ unsigned int i;
for (i = 0; i < cmds->cnt; ++i) zfree(&cmds->names[i]); zfree(&cmds->names); cmds->cnt = 0; cmds->alloc = 0;}
int cmdname_compare(const void *a_, const void *b_){ struct cmdname *a = *(struct cmdname **)a_; struct cmdname *b = *(struct cmdname **)b_; return strcmp(a->name, b->name);}
void uniq(struct cmdnames *cmds){ unsigned int i, j;
if (!cmds->cnt) return;
for (i = 1; i < cmds->cnt; i++) { if (!strcmp(cmds->names[i]->name, cmds->names[i-1]->name)) zfree(&cmds->names[i - 1]); } for (i = 0, j = 0; i < cmds->cnt; i++) { if (cmds->names[i]) { if (i == j) j++; else cmds->names[j++] = cmds->names[i]; } } cmds->cnt = j; while (j < i) cmds->names[j++] = NULL;}
void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes){ size_t ci, cj, ei; int cmp;
if (!excludes->cnt) return;
ci = cj = ei = 0; while (ci < cmds->cnt && ei < excludes->cnt) { cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name); if (cmp < 0) { if (ci == cj) { ci++; cj++; } else { cmds->names[cj++] = cmds->names[ci]; cmds->names[ci++] = NULL; } } else if (cmp == 0) { zfree(&cmds->names[ci]); ci++; ei++; } else if (cmp > 0) { ei++; } } while (ci < cmds->cnt) { if (ci != cj) { cmds->names[cj] = cmds->names[ci]; cmds->names[ci] = NULL; } ci++; cj++; } for (ci = cj; ci < cmds->cnt; ci++) assert(cmds->names[ci] == NULL); cmds->cnt = cj;}
static void get_term_dimensions(struct winsize *ws){ char *s = getenv("LINES");
if (s != NULL) { ws->ws_row = atoi(s); s = getenv("COLUMNS"); if (s != NULL) { ws->ws_col = atoi(s); if (ws->ws_row && ws->ws_col) return; } }#ifdef TIOCGWINSZ if (ioctl(1, TIOCGWINSZ, ws) == 0 && ws->ws_row && ws->ws_col) return;#endif ws->ws_row = 25; ws->ws_col = 80;}
static void pretty_print_string_list(struct cmdnames *cmds, int longest){ int cols = 1, rows; int space = longest + 1; /* min 1 SP between words */ struct winsize win; int max_cols; int i, j;
get_term_dimensions(&win); max_cols = win.ws_col - 1; /* don't print *on* the edge */
if (space < max_cols) cols = max_cols / space; rows = (cmds->cnt + cols - 1) / cols;
for (i = 0; i < rows; i++) { printf(" ");
for (j = 0; j < cols; j++) { unsigned int n = j * rows + i; unsigned int size = space;
if (n >= cmds->cnt) break; if (j == cols-1 || n + rows >= cmds->cnt) size = 1; printf("%-*s", size, cmds->names[n]->name); } putchar('\n'); }}
static int is_executable(const char *name){ struct stat st;
if (stat(name, &st) || /* stat, not lstat */ !S_ISREG(st.st_mode)) return 0;
return st.st_mode & S_IXUSR;}
static int has_extension(const char *filename, const char *ext){ size_t len = strlen(filename); size_t extlen = strlen(ext);
return len > extlen && !memcmp(filename + len - extlen, ext, extlen);}
static void list_commands_in_dir(struct cmdnames *cmds, const char *path, const char *prefix){ int prefix_len; DIR *dir = opendir(path); struct dirent *de; char *buf = NULL;
if (!dir) return; if (!prefix) prefix = "perf-"; prefix_len = strlen(prefix);
astrcatf(&buf, "%s/", path);
while ((de = readdir(dir)) != NULL) { int entlen;
if (!strstarts(de->d_name, prefix)) continue;
astrcat(&buf, de->d_name); if (!is_executable(buf)) continue;
entlen = strlen(de->d_name) - prefix_len; if (has_extension(de->d_name, ".exe")) entlen -= 4;
add_cmdname(cmds, de->d_name + prefix_len, entlen); } closedir(dir); free(buf);}
void load_command_list(const char *prefix, struct cmdnames *main_cmds, struct cmdnames *other_cmds){ const char *env_path = getenv("PATH"); char *exec_path = get_argv_exec_path();
if (exec_path) { list_commands_in_dir(main_cmds, exec_path, prefix); qsort(main_cmds->names, main_cmds->cnt, sizeof(*main_cmds->names), cmdname_compare); uniq(main_cmds); }
if (env_path) { char *paths, *path, *colon; path = paths = strdup(env_path); while (1) { if ((colon = strchr(path, ':'))) *colon = 0; if (!exec_path || strcmp(path, exec_path)) list_commands_in_dir(other_cmds, path, prefix);
if (!colon) break; path = colon + 1; } free(paths);
qsort(other_cmds->names, other_cmds->cnt, sizeof(*other_cmds->names), cmdname_compare); uniq(other_cmds); } free(exec_path); exclude_cmds(other_cmds, main_cmds);}
void list_commands(const char *title, struct cmdnames *main_cmds, struct cmdnames *other_cmds){ unsigned int i, longest = 0;
for (i = 0; i < main_cmds->cnt; i++) if (longest < main_cmds->names[i]->len) longest = main_cmds->names[i]->len; for (i = 0; i < other_cmds->cnt; i++) if (longest < other_cmds->names[i]->len) longest = other_cmds->names[i]->len;
if (main_cmds->cnt) { char *exec_path = get_argv_exec_path(); printf("available %s in '%s'\n", title, exec_path); printf("----------------"); mput_char('-', strlen(title) + strlen(exec_path)); putchar('\n'); pretty_print_string_list(main_cmds, longest); putchar('\n'); free(exec_path); }
if (other_cmds->cnt) { printf("%s available from elsewhere on your $PATH\n", title); printf("---------------------------------------"); mput_char('-', strlen(title)); putchar('\n'); pretty_print_string_list(other_cmds, longest); putchar('\n'); }}
int is_in_cmdlist(struct cmdnames *c, const char *s){ unsigned int i;
for (i = 0; i < c->cnt; i++) if (!strcmp(s, c->names[i]->name)) return 1; return 0;}