[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/libbb/getpty.c b/ap/app/busybox/src/libbb/getpty.c
new file mode 100644
index 0000000..435e4d0
--- /dev/null
+++ b/ap/app/busybox/src/libbb/getpty.c
@@ -0,0 +1,66 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini getpty implementation for busybox
+ * Bjorn Wesen, Axis Communications AB (bjornw@axis.com)
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+#include "libbb.h"
+
+#define DEBUG 0
+
+int FAST_FUNC xgetpty(char *line)
+{
+ int p;
+
+#if ENABLE_FEATURE_DEVPTS
+ p = open("/dev/ptmx", O_RDWR);
+ if (p > 0) {
+ grantpt(p); /* chmod+chown corresponding slave pty */
+ unlockpt(p); /* (what does this do?) */
+# ifndef HAVE_PTSNAME_R
+ {
+ const char *name;
+ name = ptsname(p); /* find out the name of slave pty */
+ if (!name) {
+ bb_perror_msg_and_die("ptsname error (is /dev/pts mounted?)");
+ }
+ safe_strncpy(line, name, GETPTY_BUFSIZE);
+ }
+# else
+ /* find out the name of slave pty */
+ if (ptsname_r(p, line, GETPTY_BUFSIZE-1) != 0) {
+ bb_perror_msg_and_die("ptsname error (is /dev/pts mounted?)");
+ }
+ line[GETPTY_BUFSIZE-1] = '\0';
+# endif
+ return p;
+ }
+#else
+ struct stat stb;
+ int i;
+ int j;
+
+ strcpy(line, "/dev/ptyXX");
+
+ for (i = 0; i < 16; i++) {
+ line[8] = "pqrstuvwxyzabcde"[i];
+ line[9] = '0';
+ if (stat(line, &stb) < 0) {
+ continue;
+ }
+ for (j = 0; j < 16; j++) {
+ line[9] = j < 10 ? j + '0' : j - 10 + 'a';
+ if (DEBUG)
+ fprintf(stderr, "Trying to open device: %s\n", line);
+ p = open(line, O_RDWR | O_NOCTTY);
+ if (p >= 0) {
+ line[5] = 't';
+ return p;
+ }
+ }
+ }
+#endif /* FEATURE_DEVPTS */
+ bb_error_msg_and_die("can't find free pty");
+}