perf subcmd: Create subcmd library
Move the subcommand-related files from perf to a new library named libsubcmd.a. Since we're moving files anyway, go ahead and rename 'exec_cmd.*' to 'exec-cmd.*' to be consistent with the naming of all the other files. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/c0a838d4c878ab17fee50998811612b2281355c1.1450193761.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Josh Poimboeuf
committed by
Arnaldo Carvalho de Melo
Arnaldo Carvalho de Melo
parent
2f4ce5ec1d
commit
4b6ab94eab
268
tools/lib/subcmd/help.c
Normal file
268
tools/lib/subcmd/help.c
Normal file
@@ -0,0 +1,268 @@
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <termios.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <unistd.h>
|
||||
#include <dirent.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);
|
||||
|
||||
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 = j = 1; i < cmds->cnt; i++)
|
||||
if (strcmp(cmds->names[i]->name, cmds->names[i-1]->name))
|
||||
cmds->names[j++] = cmds->names[i];
|
||||
|
||||
cmds->cnt = j;
|
||||
}
|
||||
|
||||
void exclude_cmds(struct cmdnames *cmds, struct cmdnames *excludes)
|
||||
{
|
||||
size_t ci, cj, ei;
|
||||
int cmp;
|
||||
|
||||
ci = cj = ei = 0;
|
||||
while (ci < cmds->cnt && ei < excludes->cnt) {
|
||||
cmp = strcmp(cmds->names[ci]->name, excludes->names[ei]->name);
|
||||
if (cmp < 0)
|
||||
cmds->names[cj++] = cmds->names[ci++];
|
||||
else if (cmp == 0)
|
||||
ci++, ei++;
|
||||
else if (cmp > 0)
|
||||
ei++;
|
||||
}
|
||||
|
||||
while (ci < cmds->cnt)
|
||||
cmds->names[cj++] = cmds->names[ci++];
|
||||
|
||||
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 (prefixcmp(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;
|
||||
}
|
||||
Reference in New Issue
Block a user