release/src-rt-6.x.4708/linux/linux-2.6.36/tools/perf/util/abspath.c

   1 #include "cache.h"
   2
   3 static const char *get_pwd_cwd(void)
   4 {
   5         static char cwd[PATH_MAX + 1];
   6         char *pwd;
   7         struct stat cwd_stat, pwd_stat;
   8         if (getcwd(cwd, PATH_MAX) == NULL)
   9                 return NULL;
  10         pwd = getenv("PWD");
  11         if (pwd && strcmp(pwd, cwd)) {
  12                 stat(cwd, &cwd_stat);
  13                 if (!stat(pwd, &pwd_stat) &&
  14                     pwd_stat.st_dev == cwd_stat.st_dev &&
  15                     pwd_stat.st_ino == cwd_stat.st_ino) {
  16                         strlcpy(cwd, pwd, PATH_MAX);
  17                 }
  18         }
  19         return cwd;
  20 }
  21
  22 const char *make_nonrelative_path(const char *path)
  23 {
  24         static char buf[PATH_MAX + 1];
  25
  26         if (is_absolute_path(path)) {
  27                 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
  28                         die("Too long path: %.*s", 60, path);
  29         } else {
  30                 const char *cwd = get_pwd_cwd();
  31                 if (!cwd)
  32                         die("Cannot determine the current working directory");
  33                 if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX)
  34                         die("Too long path: %.*s", 60, path);
  35         }
  36         return buf;
  37 }