validate canons without yatest_common

1 files changed, 123 insertions, 0 deletions

diff --git a/contrib/libs/libcap/cap_extint.c b/contrib/libs/libcap/cap_extint.c
new file mode 100644
index 0000000000..7d6e7ade05
--- /dev/null
+++ b/contrib/libs/libcap/cap_extint.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 1997-8 Andrew G Morgan <morgan@kernel.org>
+ *
+ * This file deals with exchanging internal and external
+ * representations of capability sets.
+ */
+
+#include "libcap.h"
+
+/*
+ * External representation for capabilities. (exported as a fixed
+ * length)
+ */
+#define CAP_EXT_MAGIC "\220\302\001\121"
+#define CAP_EXT_MAGIC_SIZE 4
+const static __u8 external_magic[CAP_EXT_MAGIC_SIZE+1] = CAP_EXT_MAGIC;
+
+struct cap_ext_struct {
+    __u8 magic[CAP_EXT_MAGIC_SIZE];
+    __u8 length_of_capset;
+    /*
+     * note, we arrange these so the caps are stacked with byte-size
+     * resolution
+     */
+    __u8 bytes[CAP_SET_SIZE][NUMBER_OF_CAP_SETS];
+};
+
+/*
+ * return size of external capability set
+ */
+
+ssize_t cap_size(cap_t caps)
+{
+    return ssizeof(struct cap_ext_struct);
+}
+
+/*
+ * Copy the internal (cap_d) capability set into an external
+ * representation.  The external representation is portable to other
+ * Linux architectures.
+ */
+
+ssize_t cap_copy_ext(void *cap_ext, cap_t cap_d, ssize_t length)
+{
+    struct cap_ext_struct *result = (struct cap_ext_struct *) cap_ext;
+    int i;
+
+    /* valid arguments? */
+    if (!good_cap_t(cap_d) || length < ssizeof(struct cap_ext_struct)
+	|| cap_ext == NULL) {
+	errno = EINVAL;
+	return -1;
+    }
+
+    /* fill external capability set */
+    memcpy(&result->magic, external_magic, CAP_EXT_MAGIC_SIZE);
+    result->length_of_capset = CAP_SET_SIZE;
+
+    for (i=0; i<NUMBER_OF_CAP_SETS; ++i) {
+	size_t j;
+	for (j=0; j<CAP_SET_SIZE; ) {
+	    __u32 val;
+
+	    val = cap_d->u[j/sizeof(__u32)].flat[i];
+
+	    result->bytes[j++][i] =  val        & 0xFF;
+	    result->bytes[j++][i] = (val >>= 8) & 0xFF;
+	    result->bytes[j++][i] = (val >>= 8) & 0xFF;
+	    result->bytes[j++][i] = (val >> 8)  & 0xFF;
+	}
+    }
+
+    /* All done: return length of external representation */
+    return (ssizeof(struct cap_ext_struct));
+}
+
+/*
+ * Import an external representation to produce an internal rep.
+ * the internal rep should be liberated with cap_free().
+ */
+
+cap_t cap_copy_int(const void *cap_ext)
+{
+    const struct cap_ext_struct *export =
+	(const struct cap_ext_struct *) cap_ext;
+    cap_t cap_d;
+    int set, blen;
+
+    /* Does the external representation make sense? */
+    if ((export == NULL)
+	|| memcmp(export->magic, external_magic, CAP_EXT_MAGIC_SIZE)) {
+	errno = EINVAL;
+	return NULL;
+    }
+
+    /* Obtain a new internal capability set */
+    if (!(cap_d = cap_init()))
+       return NULL;
+
+    blen = export->length_of_capset;
+    for (set=0; set<NUMBER_OF_CAP_SETS; ++set) {
+	unsigned blk;
+	int bno = 0;
+	for (blk=0; blk<(CAP_SET_SIZE/sizeof(__u32)); ++blk) {
+	    __u32 val = 0;
+
+	    if (bno != blen)
+		val  = export->bytes[bno++][set];
+	    if (bno != blen)
+		val |= export->bytes[bno++][set] << 8;
+	    if (bno != blen)
+		val |= export->bytes[bno++][set] << 16;
+	    if (bno != blen)
+		val |= export->bytes[bno++][set] << 24;
+
+	    cap_d->u[blk].flat[set] = val;
+	}
+    }
+
+    /* all done */
+    return cap_d;
+}
+