1 /* lsm.h - header file for lib directory
3 * Copyright 2015 Rob Landley <rob@landley.net>
7 #include <selinux/selinux.h>
9 #define is_selinux_enabled() 0
10 #define setfscreatecon(...) (-1)
11 #define getcon(...) (-1)
12 #define getfilecon(...) (-1)
13 #define lgetfilecon(...) (-1)
14 #define fgetfilecon(...) (-1)
15 #define setfilecon(...) (-1)
16 #define lsetfilecon(...) (-1)
17 #define fsetfilecon(...) (-1)
21 #include <sys/smack.h>
22 #include <sys/xattr.h>
23 #include <linux/xattr.h>
25 #define XATTR_NAME_SMACK 0
26 //ssize_t fgetxattr (int fd, char *name, void *value, size_t size);
27 #define smack_smackfs_path(...) (-1)
28 #define smack_new_label_from_self(...) (-1)
29 #define smack_new_label_from_path(...) (-1)
30 #define smack_new_label_from_file(...) (-1)
31 #define smack_set_label_for_self(...) (-1)
32 #define smack_set_label_for_path(...) (-1)
33 #define smack_set_label_for_file(...) (-1)
36 // This turns into "return 0" when no LSM and lets code optimize out.
37 static inline int lsm_enabled(void)
39 if (CFG_TOYBOX_SMACK) return !!smack_smackfs_path();
40 else return is_selinux_enabled() == 1;
43 static inline char *lsm_name(void)
45 if (CFG_TOYBOX_SMACK) return "Smack";
46 if (CFG_TOYBOX_SELINUX) return "SELinux";
51 // Fetch this process's lsm context
52 static inline char *lsm_context(void)
57 if (CFG_TOYBOX_SMACK) ok = smack_new_label_from_self(&result) > 0;
58 else ok = getcon(&result) == 0;
60 return ok ? result : strdup("?");
63 // Set default label to apply to newly created stuff (NULL to clear it)
64 static inline int lsm_set_create(char *context)
66 if (CFG_TOYBOX_SMACK) return smack_set_label_for_self(context);
67 else return setfscreatecon(context);
70 // Label a file, following symlinks
71 static inline int lsm_set_context(char *filename, char *context)
74 return smack_set_label_for_path(filename, XATTR_NAME_SMACK, 1, context);
75 else return setfilecon(filename, context);
78 // Label a file, don't follow symlinks
79 static inline int lsm_lset_context(char *filename, char *context)
82 return smack_set_label_for_path(filename, XATTR_NAME_SMACK, 0, context);
83 else return lsetfilecon(filename, context);
86 // Label a file by filehandle
87 static inline int lsm_fset_context(int file, char *context)
90 return smack_set_label_for_file(file, XATTR_NAME_SMACK, context);
91 else return fsetfilecon(file, context);
94 // returns -1 in case of error or else the length of the context */
95 // context can be NULL to get the length only */
96 static inline int lsm_get_context(char *filename, char **context)
99 return smack_new_label_from_path(filename, XATTR_NAME_SMACK, 1, context);
100 else return getfilecon(filename, context);
103 static inline int lsm_lget_context(char *filename, char **context)
105 if (CFG_TOYBOX_SMACK)
106 return smack_new_label_from_path(filename, XATTR_NAME_SMACK, 0, context);
107 else return lgetfilecon(filename, context);
110 static inline int lsm_fget_context(int file, char **context)
112 if (CFG_TOYBOX_SMACK)
113 return smack_new_label_from_file(file, XATTR_NAME_SMACK, context);
114 return fgetfilecon(file, context);