[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/util-linux/flock.c b/ap/app/busybox/src/util-linux/flock.c
new file mode 100644
index 0000000..05a747f
--- /dev/null
+++ b/ap/app/busybox/src/util-linux/flock.c
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2010 Timo Teras <timo.teras@iki.fi>
+ *
+ * This is free software, licensed under the GNU General Public License v2.
+ */
+
+//usage:#define flock_trivial_usage
+//usage: "[-sxun] FD|{FILE [-c] PROG ARGS}"
+//usage:#define flock_full_usage "\n\n"
+//usage: "[Un]lock file descriptor, or lock FILE, run PROG\n"
+//usage: "\n -s Shared lock"
+//usage: "\n -x Exclusive lock (default)"
+//usage: "\n -u Unlock FD"
+//usage: "\n -n Fail rather than wait"
+
+#include <sys/file.h>
+#include "libbb.h"
+
+int flock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int flock_main(int argc UNUSED_PARAM, char **argv)
+{
+ int mode, opt, fd;
+ enum {
+ OPT_s = (1 << 0),
+ OPT_x = (1 << 1),
+ OPT_n = (1 << 2),
+ OPT_u = (1 << 3),
+ OPT_c = (1 << 4),
+ };
+
+#if ENABLE_LONG_OPTS
+ static const char getopt_longopts[] ALIGN1 =
+ "shared\0" No_argument "s"
+ "exclusive\0" No_argument "x"
+ "unlock\0" No_argument "u"
+ "nonblock\0" No_argument "n"
+ ;
+ applet_long_options = getopt_longopts;
+#endif
+ opt_complementary = "-1";
+
+ opt = getopt32(argv, "+sxnu");
+ argv += optind;
+
+ if (argv[1]) {
+ fd = open(argv[0], O_RDONLY|O_NOCTTY|O_CREAT, 0666);
+ if (fd < 0 && errno == EISDIR)
+ fd = open(argv[0], O_RDONLY|O_NOCTTY);
+ if (fd < 0)
+ bb_perror_msg_and_die("can't open '%s'", argv[0]);
+ //TODO? close_on_exec_on(fd);
+ } else {
+ fd = xatoi_positive(argv[0]);
+ }
+ argv++;
+
+ /* If it is "flock FILE -c PROG", then -c isn't caught by getopt32:
+ * we use "+" in order to support "flock -opt FILE PROG -with-opts",
+ * we need to remove -c by hand.
+ * TODO: in upstream, -c 'PROG ARGS' means "run sh -c 'PROG ARGS'"
+ */
+ if (argv[0]
+ && argv[0][0] == '-'
+ && ( (argv[0][1] == 'c' && !argv[0][2])
+ || (ENABLE_LONG_OPTS && strcmp(argv[0] + 1, "-command") == 0)
+ )
+ ) {
+ argv++;
+ }
+
+ if (OPT_s == LOCK_SH && OPT_x == LOCK_EX && OPT_n == LOCK_NB && OPT_u == LOCK_UN) {
+ /* With suitably matched constants, mode setting is much simpler */
+ mode = opt & (LOCK_SH + LOCK_EX + LOCK_NB + LOCK_UN);
+ if (!(mode & ~LOCK_NB))
+ mode |= LOCK_EX;
+ } else {
+ if (opt & OPT_u)
+ mode = LOCK_UN;
+ else if (opt & OPT_s)
+ mode = LOCK_SH;
+ else
+ mode = LOCK_EX;
+ if (opt & OPT_n)
+ mode |= LOCK_NB;
+ }
+
+ if (flock(fd, mode) != 0) {
+ if (errno == EWOULDBLOCK)
+ return EXIT_FAILURE;
+ bb_perror_nomsg_and_die();
+ }
+
+ if (argv[0])
+ return spawn_and_wait(argv);
+
+ return EXIT_SUCCESS;
+}