auto import from //depot/cupcake/@135843
diff --git a/daemon/opd_pipe.c b/daemon/opd_pipe.c
new file mode 100644
index 0000000..a5c334a
--- /dev/null
+++ b/daemon/opd_pipe.c
@@ -0,0 +1,96 @@
+/**
+ * @file daemon/opd_pipe.c
+ * Functions handling the $SESSIONDIR/opd_pipe FIFO special file.
+ * NOTE: This code is dealing with potentially insecure input.
+ *
+ * @remark Copyright 2008 OProfile authors
+ * @remark Read the file COPYING
+ *
+ * @author Daniel Hansel
+ */
+
+#include "opd_pipe.h"
+#include "opd_printf.h"
+#include "op_config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+static int fifo;
+
+void opd_create_pipe(void)
+{
+ mode_t orig_umask = umask(0111);
+ if (mkfifo(op_pipe_file, 0666) == -1) {
+ if (errno != EEXIST) {
+ perror("oprofiled: couldn't create pipe: ");
+ exit(EXIT_FAILURE);
+ }
+ }
+ umask(orig_umask);
+}
+
+
+void opd_open_pipe(void)
+{
+ fifo = open(op_pipe_file, O_RDONLY | O_NONBLOCK);
+ if (fifo == -1) {
+ perror("oprofiled: couldn't open pipe: ");
+ exit(EXIT_FAILURE);
+ }
+}
+
+
+void opd_close_pipe(void)
+{
+ close(fifo);
+}
+
+
+int is_jitconv_requested(void)
+{
+ /* number of dropped (unknown) requests */
+ static long nr_drops = 0;
+ /* modulus to output only a few warnings to avoid flooding oprofiled.log */
+ static int mod_cnt_drops = 1;
+ FILE * fd;
+ char line[256];
+ int i, ret = 0;
+
+ /* get a file descriptor to the pipe */
+ fd = fdopen(fifo, "r");
+
+ if (fd == NULL) {
+ perror("oprofiled: couldn't create file descriptor: ");
+ exit(EXIT_FAILURE);
+ }
+
+ /* read up to 99 lines to check for 'do_jitconv' */
+ for (i = 0; i < 99; i++) {
+ /* just break if no new line is found */
+ if (fgets(line, 256, fd) == NULL)
+ break;
+ line[strlen(line) - 1] = '\0';
+
+ if (strstr(line, "do_jitconv") != NULL) {
+ ret = 1;
+ } else {
+ nr_drops++;
+
+ if (nr_drops % mod_cnt_drops == 0) {
+ printf(
+ "Warning: invalid pipe request received (dropped request(s): %ld)\n",
+ nr_drops);
+ /* increase modulus to avoid flooding log file */
+ mod_cnt_drops *= 5;
+ }
+ }
+ }
+
+ return ret;
+}