linux/filesystem.c

Go to the documentation of this file.

 
#ifdef __linux__
 
#include <ascii-chat/platform/filesystem.h>
#include <ascii-chat/common.h>
#include <ascii-chat/asciichat_errno.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
 
bool platform_get_executable_path(char *exe_path, size_t path_size) {
  if (!exe_path || path_size == 0) {
    SET_ERRNO(ERROR_INVALID_PARAM, "Invalid parameters: exe_path=%p, path_size=%zu", (void *)exe_path, path_size);
    return false;
  }
 
  ssize_t len = readlink("/proc/self/exe", exe_path, path_size - 1);
  if (len < 0) {
    SET_ERRNO_SYS(ERROR_INVALID_STATE, "readlink(\"/proc/self/exe\") failed: %s", SAFE_STRERROR(errno));
    return false;
  }
  if ((size_t)len >= path_size - 1) {
    SET_ERRNO(ERROR_BUFFER_OVERFLOW,
              "Executable path exceeds buffer size (path length >= %zu bytes, buffer size = %zu bytes)", (size_t)len,
              path_size);
    return false;
  }
  // NOLINTNEXTLINE(clang-analyzer-security.ArrayBound) - len bounded by path_size check above
  exe_path[len] = '\0';
  return true;
}
 
#endif