[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/procps/free.c b/ap/app/busybox/src/procps/free.c
new file mode 100644
index 0000000..73a69c6
--- /dev/null
+++ b/ap/app/busybox/src/procps/free.c
@@ -0,0 +1,135 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini free implementation for busybox
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+
+/* getopt not needed */
+
+//usage:#define free_trivial_usage
+//usage: "" IF_DESKTOP("[-b/k/m/g]")
+//usage:#define free_full_usage "\n\n"
+//usage: "Display the amount of free and used system memory"
+//usage:
+//usage:#define free_example_usage
+//usage: "$ free\n"
+//usage: " total used free shared buffers\n"
+//usage: " Mem: 257628 248724 8904 59644 93124\n"
+//usage: " Swap: 128516 8404 120112\n"
+//usage: "Total: 386144 257128 129016\n"
+
+#include "libbb.h"
+#ifdef __linux__
+# include <sys/sysinfo.h>
+#endif
+
+struct globals {
+ unsigned mem_unit;
+#if ENABLE_DESKTOP
+ uint8_t unit_steps;
+# define G_unit_steps g->unit_steps
+#else
+# define G_unit_steps 10
+#endif
+};
+/* Because of NOFORK, "globals" are not in global data */
+
+static unsigned long long scale(struct globals *g, unsigned long d)
+{
+ return ((unsigned long long)d * g->mem_unit) >> G_unit_steps;
+}
+
+/* NOINLINE reduces main() stack usage, which makes code smaller (on x86 at least) */
+static NOINLINE unsigned long parse_cached_kb(void)
+{
+ char buf[60]; /* actual lines we expect are ~30 chars or less */
+ FILE *fp;
+ unsigned long cached = 0;
+
+ fp = xfopen_for_read("/proc/meminfo");
+ while (fgets(buf, sizeof(buf), fp) != NULL) {
+ if (sscanf(buf, "Cached: %lu %*s\n", &cached) == 1)
+ break;
+ }
+ /* Have to close because of NOFORK */
+ fclose(fp);
+
+ return cached;
+}
+
+int free_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int free_main(int argc UNUSED_PARAM, char **argv IF_NOT_DESKTOP(UNUSED_PARAM))
+{
+ struct globals G;
+ struct sysinfo info;
+ unsigned long long cached;
+
+#if ENABLE_DESKTOP
+ G.unit_steps = 10;
+ if (argv[1] && argv[1][0] == '-') {
+ switch (argv[1][1]) {
+ case 'b':
+ G.unit_steps = 0;
+ break;
+ case 'k': /* 2^10 */
+ /* G.unit_steps = 10; - already is */
+ break;
+ case 'm': /* 2^(2*10) */
+ G.unit_steps = 20;
+ break;
+ case 'g': /* 2^(3*10) */
+ G.unit_steps = 30;
+ break;
+ default:
+ bb_show_usage();
+ }
+ }
+#endif
+ printf(" %11s%11s%11s%11s%11s%11s\n"
+ "Mem: ",
+ "total",
+ "used",
+ "free",
+ "shared", "buffers", "cached" /* swap and total don't have these columns */
+ );
+
+ sysinfo(&info);
+ /* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
+ G.mem_unit = (info.mem_unit ? info.mem_unit : 1);
+ /* Extract cached from /proc/meminfo and convert to mem_units */
+ cached = ((unsigned long long) parse_cached_kb() * 1024) / G.mem_unit;
+
+#define FIELDS_6 "%11llu%11llu%11llu%11llu%11llu%11llu\n"
+#define FIELDS_3 (FIELDS_6 + 3*6)
+#define FIELDS_2 (FIELDS_6 + 4*6)
+
+ printf(FIELDS_6,
+ scale(&G, info.totalram), //total
+ scale(&G, info.totalram - info.freeram), //used
+ scale(&G, info.freeram), //free
+ scale(&G, info.sharedram), //shared
+ scale(&G, info.bufferram), //buffers
+ scale(&G, cached) //cached
+ );
+ /* Show alternate, more meaningful busy/free numbers by counting
+ * buffer cache as free memory. */
+ printf("-/+ buffers/cache:");
+ cached += info.freeram;
+ cached += info.bufferram;
+ printf(FIELDS_2,
+ scale(&G, info.totalram - cached), //used
+ scale(&G, cached) //free
+ );
+#if BB_MMU
+ printf("Swap: ");
+ printf(FIELDS_3,
+ scale(&G, info.totalswap), //total
+ scale(&G, info.totalswap - info.freeswap), //used
+ scale(&G, info.freeswap) //free
+ );
+#endif
+ return EXIT_SUCCESS;
+}