static int (*real_close)(int);
static size_t (*real_fwrite)(const void *, size_t, size_t, FILE *);
+/* Did we already (try to) parse the environment and setup the necessary
+ * variables? */
+static int initialized;
+/* Force hooked writes even when not writing to a tty. Used for tests. */
+static int force_write_to_non_tty;
+
#include "constants.h"
#ifdef DEBUG
/* Should the "action" handler be invoked for this file descriptor? */
static int check_handle_fd(int fd) {
- /* Never touch anything not going to a terminal. */
- if (!isatty(fd)) {
- return 0;
- }
-
/* Load state from environment. Only necessary once per process. */
- if (!tracked_fds) {
+ if (!initialized) {
init_from_environment();
}
+ /* Never touch anything not going to a terminal - unless we are explicitly
+ * asked to do so. */
+ if (!force_write_to_non_tty && !isatty(fd)) {
+ return 0;
+ }
+
if (tracked_fds_count == 0) {
return 0;
}
debug("%d -> %d\t\t\t[%d]\n", oldfd, newfd, getpid());
#endif
- if (!tracked_fds) {
+ if (!initialized) {
init_from_environment();
}
if (tracked_fds_count == 0) {
debug("%d -> .\t\t\t[%d]\n", fd, getpid());
#endif
- if (!tracked_fds) {
+ if (!initialized) {
init_from_environment();
}
HOOK_FILE1(int, puts_unlocked, stdout,
const char *, s)
+/* perror(3) */
+HOOK_VOID1(void, perror, STDERR_FILENO,
+ const char *, s)
+
/* Hook functions which duplicate file descriptors to track them. */