auto import from //depot/cupcake/@135843
diff --git a/toolbox/df.c b/toolbox/df.c
new file mode 100644
index 0000000..90476bd
--- /dev/null
+++ b/toolbox/df.c
@@ -0,0 +1,63 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/statfs.h>
+
+static int ok = EXIT_SUCCESS;
+
+static void df(char *s, int always) {
+ struct statfs st;
+
+ if (statfs(s, &st) < 0) {
+ fprintf(stderr, "%s: %s\n", s, strerror(errno));
+ ok = EXIT_FAILURE;
+ } else {
+ if (st.f_blocks == 0 && !always)
+ return;
+
+ printf("%s: %lldK total, %lldK used, %lldK available (block size %d)\n",
+ s,
+ ((long long)st.f_blocks * (long long)st.f_bsize) / 1024,
+ ((long long)(st.f_blocks - (long long)st.f_bfree) * st.f_bsize) / 1024,
+ ((long long)st.f_bfree * (long long)st.f_bsize) / 1024,
+ (int) st.f_bsize);
+ }
+}
+
+int df_main(int argc, char *argv[]) {
+ if (argc == 1) {
+ char s[2000];
+ FILE *f = fopen("/proc/mounts", "r");
+
+ while (fgets(s, 2000, f)) {
+ char *c, *e = s;
+
+ for (c = s; *c; c++) {
+ if (*c == ' ') {
+ e = c + 1;
+ break;
+ }
+ }
+
+ for (c = e; *c; c++) {
+ if (*c == ' ') {
+ *c = '\0';
+ break;
+ }
+ }
+
+ df(e, 0);
+ }
+
+ fclose(f);
+ } else {
+ int i;
+
+ for (i = 1; i < argc; i++) {
+ df(argv[i], 1);
+ }
+ }
+
+ exit(ok);
+}