107 lines
2.2 KiB
C
107 lines
2.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
/*
|
||
|
|
* I'm tired of doing "vsnprintf()" etc just to open a
|
||
|
|
* file, so here's a "return static buffer with printf"
|
||
|
|
* interface for paths.
|
||
|
|
*
|
||
|
|
* It's obviously not thread-safe. Sue me. But it's quite
|
||
|
|
* useful for doing things like
|
||
|
|
*
|
||
|
|
* f = open(mkpath("%s/%s.perf", base, name), O_RDONLY);
|
||
|
|
*
|
||
|
|
* which is what it's designed for.
|
||
|
|
*/
|
||
|
|
#include "path.h"
|
||
|
|
#include "cache.h"
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <limits.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <dirent.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
static char bad_path[] = "/bad-path/";
|
||
|
|
/*
|
||
|
|
* One hack:
|
||
|
|
*/
|
||
|
|
static char *get_pathname(void)
|
||
|
|
{
|
||
|
|
static char pathname_array[4][PATH_MAX];
|
||
|
|
static int idx;
|
||
|
|
|
||
|
|
return pathname_array[3 & ++idx];
|
||
|
|
}
|
||
|
|
|
||
|
|
static char *cleanup_path(char *path)
|
||
|
|
{
|
||
|
|
/* Clean it up */
|
||
|
|
if (!memcmp(path, "./", 2)) {
|
||
|
|
path += 2;
|
||
|
|
while (*path == '/')
|
||
|
|
path++;
|
||
|
|
}
|
||
|
|
return path;
|
||
|
|
}
|
||
|
|
|
||
|
|
char *mkpath(const char *fmt, ...)
|
||
|
|
{
|
||
|
|
va_list args;
|
||
|
|
unsigned len;
|
||
|
|
char *pathname = get_pathname();
|
||
|
|
|
||
|
|
va_start(args, fmt);
|
||
|
|
len = vsnprintf(pathname, PATH_MAX, fmt, args);
|
||
|
|
va_end(args);
|
||
|
|
if (len >= PATH_MAX)
|
||
|
|
return bad_path;
|
||
|
|
return cleanup_path(pathname);
|
||
|
|
}
|
||
|
|
|
||
|
|
int path__join(char *bf, size_t size, const char *path1, const char *path2)
|
||
|
|
{
|
||
|
|
return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2);
|
||
|
|
}
|
||
|
|
|
||
|
|
int path__join3(char *bf, size_t size, const char *path1, const char *path2, const char *path3)
|
||
|
|
{
|
||
|
|
return scnprintf(bf, size, "%s%s%s%s%s", path1, path1[0] ? "/" : "",
|
||
|
|
path2, path2[0] ? "/" : "", path3);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool is_regular_file(const char *file)
|
||
|
|
{
|
||
|
|
struct stat st;
|
||
|
|
|
||
|
|
if (stat(file, &st))
|
||
|
|
return false;
|
||
|
|
|
||
|
|
return S_ISREG(st.st_mode);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
|
||
|
|
bool is_directory(const char *base_path, const struct dirent *dent)
|
||
|
|
{
|
||
|
|
char path[PATH_MAX];
|
||
|
|
struct stat st;
|
||
|
|
|
||
|
|
snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name);
|
||
|
|
if (stat(path, &st))
|
||
|
|
return false;
|
||
|
|
|
||
|
|
return S_ISDIR(st.st_mode);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool is_executable_file(const char *base_path, const struct dirent *dent)
|
||
|
|
{
|
||
|
|
char path[PATH_MAX];
|
||
|
|
struct stat st;
|
||
|
|
|
||
|
|
snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name);
|
||
|
|
if (stat(path, &st))
|
||
|
|
return false;
|
||
|
|
|
||
|
|
return !S_ISDIR(st.st_mode) && (st.st_mode & S_IXUSR);
|
||
|
|
}
|