diff options
| -rw-r--r-- | src/main/cpp/blaze_util_freebsd.cc | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/src/main/cpp/blaze_util_freebsd.cc b/src/main/cpp/blaze_util_freebsd.cc index 20a6eb06d6..491fcbb07b 100644 --- a/src/main/cpp/blaze_util_freebsd.cc +++ b/src/main/cpp/blaze_util_freebsd.cc @@ -73,16 +73,23 @@ void WarnFilesystemType(const string &output_base) { string GetSelfPath() { char buffer[PATH_MAX] = {}; - ssize_t bytes = readlink("/proc/curproc/file", buffer, sizeof(buffer)); - if (bytes == sizeof(buffer)) { - // symlink contents truncated - bytes = -1; - errno = ENAMETOOLONG; - } - if (bytes == -1) { - pdie(blaze_exit_code::INTERNAL_ERROR, "error reading /proc/curproc/file"); + auto pid = getpid(); + if (kill(pid, 0) < 0) return ""; + auto procstat = procstat_open_sysctl(); + unsigned int n; + auto p = procstat_getprocs(procstat, KERN_PROC_PID, pid, &n); + if (p) { + if (n != 1) { + pdie(blaze_exit_code::INTERNAL_ERROR, + "expected exactly one process from procstat_getprocs, got %d", n); + } + auto r = procstat_getpathname(procstat, p, buffer, PATH_MAX); + if (r != 0) { + pdie(blaze_exit_code::INTERNAL_ERROR, "error procstat_getpathname"); + } + procstat_freeprocs(procstat, p); } - buffer[bytes] = '\0'; // readlink does not NUL-terminate + procstat_close(procstat); return string(buffer); } |