mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 06:55:13 +08:00
370ce164de
Avoid 4 static arrays for paths, pass in a char[] buffer to use. Makes mkpath thread safe for the small number of users. Also removes 16,384 bytes from .bss. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: K Prateek Nayak <kprateek.nayak@amd.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Ross Zwisler <zwisler@chromium.org> Cc: Sean Christopherson <seanjc@google.com> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Cc: Yang Jihong <yangjihong1@huawei.com> Link: https://lore.kernel.org/r/20230526183401.2326121-13-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#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 *cleanup_path(char *path)
|
|
{
|
|
/* Clean it up */
|
|
if (!memcmp(path, "./", 2)) {
|
|
path += 2;
|
|
while (*path == '/')
|
|
path++;
|
|
}
|
|
return path;
|
|
}
|
|
|
|
char *mkpath(char *path_buf, size_t sz, const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
unsigned len;
|
|
|
|
va_start(args, fmt);
|
|
len = vsnprintf(path_buf, sz, fmt, args);
|
|
va_end(args);
|
|
if (len >= sz)
|
|
strncpy(path_buf, "/bad-path/", sz);
|
|
return cleanup_path(path_buf);
|
|
}
|
|
|
|
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);
|
|
}
|