+
+/* Set the FD_CLOEXEC flag of desc if value is nonzero,
+ or clear the flag if value is 0.
+ Return 0 on success, or -1 on error with errno set. */
+
+int set_cloexec_flag (int desc, int value)
+{
+ int oldflags = fcntl (desc, F_GETFD, 0);
+ /* If reading the flags failed, return error indication now. */
+ if (oldflags < 0)
+ return oldflags;
+ /* Set just the flag we want to set. */
+ if (value != 0)
+ oldflags |= FD_CLOEXEC;
+ else
+ oldflags &= ~FD_CLOEXEC;
+ /* Store modified flag word in the descriptor. */
+ return fcntl (desc, F_SETFD, oldflags);
+}