tools/perf/util/path.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "path.h"
   3 #include "cache.h"
   4 #include <linux/kernel.h>
   5 #include <limits.h>
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <sys/types.h>
   9 #include <sys/stat.h>
  10 #include <dirent.h>
  11 #include <unistd.h>
  12
  13 static char *cleanup_path(char *path)
  14 {
  15         /* Clean it up */
  16         if (!memcmp(path, "./", 2)) {
  17                 path += 2;
  18                 while (*path == '/')
  19                         path++;
  20         }
  21         return path;
  22 }
  23
  24 char *mkpath(char *path_buf, size_t sz, const char *fmt, ...)
  25 {
  26         va_list args;
  27         unsigned len;
  28
  29         va_start(args, fmt);
  30         len = vsnprintf(path_buf, sz, fmt, args);
  31         va_end(args);
  32         if (len >= sz)
  33                 strncpy(path_buf, "/bad-path/", sz);
  34         return cleanup_path(path_buf);
  35 }
  36
  37 int path__join(char *bf, size_t size, const char *path1, const char *path2)
  38 {
  39         return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2);
  40 }
  41
  42 int path__join3(char *bf, size_t size, const char *path1, const char *path2, const char *path3)
  43 {
  44         return scnprintf(bf, size, "%s%s%s%s%s", path1, path1[0] ? "/" : "",
  45                          path2, path2[0] ? "/" : "", path3);
  46 }
  47
  48 bool is_regular_file(const char *file)
  49 {
  50         struct stat st;
  51
  52         if (stat(file, &st))
  53                 return false;
  54
  55         return S_ISREG(st.st_mode);
  56 }
  57
  58 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */
  59 bool is_directory(const char *base_path, const struct dirent *dent)
  60 {
  61         char path[PATH_MAX];
  62         struct stat st;
  63
  64         snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name);
  65         if (stat(path, &st))
  66                 return false;
  67
  68         return S_ISDIR(st.st_mode);
  69 }
  70
  71 bool is_executable_file(const char *base_path, const struct dirent *dent)
  72 {
  73         char path[PATH_MAX];
  74         struct stat st;
  75
  76         snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name);
  77         if (stat(path, &st))
  78                 return false;
  79
  80         return !S_ISDIR(st.st_mode) && (st.st_mode & S_IXUSR);
  81 }