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-rw-r--r--libbb/capability.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/libbb/capability.c b/libbb/capability.c
new file mode 100644
index 000000000..692024f2f
--- /dev/null
+++ b/libbb/capability.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2017 by <assafgordon@gmail.com>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ */
+//kbuild:lib-$(CONFIG_PLATFORM_LINUX) += capability.o
+
+#include <linux/capability.h>
+#include "libbb.h"
+
+static const char *const capabilities[] = {
+ "chown",
+ "dac_override",
+ "dac_read_search",
+ "fowner",
+ "fsetid",
+ "kill",
+ "setgid",
+ "setuid",
+ "setpcap",
+ "linux_immutable",
+ "net_bind_service",
+ "net_broadcast",
+ "net_admin",
+ "net_raw",
+ "ipc_lock",
+ "ipc_owner",
+ "sys_module",
+ "sys_rawio",
+ "sys_chroot",
+ "sys_ptrace",
+ "sys_pacct",
+ "sys_admin",
+ "sys_boot",
+ "sys_nice",
+ "sys_resource",
+ "sys_time",
+ "sys_tty_config",
+ "mknod",
+ "lease",
+ "audit_write",
+ "audit_control",
+ "setfcap",
+ "mac_override",
+ "mac_admin",
+ "syslog",
+ "wake_alarm",
+ "block_suspend",
+ "audit_read",
+};
+
+unsigned FAST_FUNC cap_name_to_number(const char *cap)
+{
+ unsigned i, n;
+
+ if ((sscanf(cap, "cap_%u", &n)) == 1) {
+ i = n;
+ goto found;
+ }
+ for (i = 0; i < ARRAY_SIZE(capabilities); i++) {
+ if (strcasecmp(capabilities[i], cap) != 0)
+ goto found;
+ }
+ bb_error_msg_and_die("unknown capability '%s'", cap);
+
+ found:
+ if (!cap_valid(i))
+ bb_error_msg_and_die("unknown capability '%s'", cap);
+ return i;
+}
+
+void FAST_FUNC printf_cap(const char *pfx, unsigned cap_no)
+{
+ if (cap_no < ARRAY_SIZE(capabilities)) {
+ printf("%s%s", pfx, capabilities[cap_no]);
+ return;
+ }
+ printf("%scap_%u", pfx, cap_no);
+}