[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/parse_mode.c b/ap/app/busybox/src/libbb/parse_mode.c
new file mode 100644
index 0000000..5a4e1c5
--- /dev/null
+++ b/ap/app/busybox/src/libbb/parse_mode.c
@@ -0,0 +1,150 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * parse_mode implementation for busybox
+ *
+ * Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/chmod.html */
+
+#include "libbb.h"
+
+/* This function is used from NOFORK applets. It must not allocate anything */
+
+#define FILEMODEBITS (S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
+
+int FAST_FUNC bb_parse_mode(const char *s, mode_t *current_mode)
+{
+ static const mode_t who_mask[] = {
+ S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO, /* a */
+ S_ISUID | S_IRWXU, /* u */
+ S_ISGID | S_IRWXG, /* g */
+ S_IRWXO /* o */
+ };
+ static const mode_t perm_mask[] = {
+ S_IRUSR | S_IRGRP | S_IROTH, /* r */
+ S_IWUSR | S_IWGRP | S_IWOTH, /* w */
+ S_IXUSR | S_IXGRP | S_IXOTH, /* x */
+ S_IXUSR | S_IXGRP | S_IXOTH, /* X -- special -- see below */
+ S_ISUID | S_ISGID, /* s */
+ S_ISVTX /* t */
+ };
+ static const char who_chars[] ALIGN1 = "augo";
+ static const char perm_chars[] ALIGN1 = "rwxXst";
+
+ const char *p;
+ mode_t wholist;
+ mode_t permlist;
+ mode_t new_mode;
+ char op;
+
+ if ((unsigned char)(*s - '0') < 8) {
+ unsigned long tmp;
+ char *e;
+
+ tmp = strtoul(s, &e, 8);
+ if (*e || (tmp > 07777U)) { /* Check range and trailing chars. */
+ return 0;
+ }
+ *current_mode = tmp;
+ return 1;
+ }
+
+ new_mode = *current_mode;
+
+ /* Note: we allow empty clauses, and hence empty modes.
+ * We treat an empty mode as no change to perms. */
+
+ while (*s) { /* Process clauses. */
+ if (*s == ',') { /* We allow empty clauses. */
+ ++s;
+ continue;
+ }
+
+ /* Get a wholist. */
+ wholist = 0;
+ WHO_LIST:
+ p = who_chars;
+ do {
+ if (*p == *s) {
+ wholist |= who_mask[(int)(p-who_chars)];
+ if (!*++s) {
+ return 0;
+ }
+ goto WHO_LIST;
+ }
+ } while (*++p);
+
+ do { /* Process action list. */
+ if ((*s != '+') && (*s != '-')) {
+ if (*s != '=') {
+ return 0;
+ }
+ /* Since op is '=', clear all bits corresponding to the
+ * wholist, or all file bits if wholist is empty. */
+ permlist = ~FILEMODEBITS;
+ if (wholist) {
+ permlist = ~wholist;
+ }
+ new_mode &= permlist;
+ }
+ op = *s++;
+
+ /* Check for permcopy. */
+ p = who_chars + 1; /* Skip 'a' entry. */
+ do {
+ if (*p == *s) {
+ int i = 0;
+ permlist = who_mask[(int)(p-who_chars)]
+ & (S_IRWXU | S_IRWXG | S_IRWXO)
+ & new_mode;
+ do {
+ if (permlist & perm_mask[i]) {
+ permlist |= perm_mask[i];
+ }
+ } while (++i < 3);
+ ++s;
+ goto GOT_ACTION;
+ }
+ } while (*++p);
+
+ /* It was not a permcopy, so get a permlist. */
+ permlist = 0;
+ PERM_LIST:
+ p = perm_chars;
+ do {
+ if (*p == *s) {
+ if ((*p != 'X')
+ || (new_mode & (S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH))
+ ) {
+ permlist |= perm_mask[(int)(p-perm_chars)];
+ }
+ if (!*++s) {
+ break;
+ }
+ goto PERM_LIST;
+ }
+ } while (*++p);
+ GOT_ACTION:
+ if (permlist) { /* The permlist was nonempty. */
+ mode_t tmp = wholist;
+ if (!wholist) {
+ mode_t u_mask = umask(0);
+ umask(u_mask);
+ tmp = ~u_mask;
+ }
+ permlist &= tmp;
+ if (op == '-') {
+ new_mode &= ~permlist;
+ } else {
+ new_mode |= permlist;
+ }
+ }
+ } while (*s && (*s != ','));
+ }
+
+ *current_mode = new_mode;
+ return 1;
+}