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Add the ability to mediate signals.

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Add signal rules and make sure the parser encodes support for them
if the supported feature set reports supporting them.

The current format of the signal rule is

  [audit] [deny] signal [<signal_perms>] [<signal_set>] <target_profile>,

  signal_perm  := 'send'|'receive'|'r'|'w'|'rw'
  signal_perms := <signal_perm> | '(' <signal_perm> ([,]<signal_perm>)* ')'
  signal := ("hup"|"int"|"quit"|"ill"|"trap"|"abrt"|"bus"|"fpe"|"kill"|
             "usr1"|"segv"|"usr2"|"pipe"|"alrm"|"term"|"tkflt"|"chld"|
             "cont"|"stop"|"stp"|"ttin"|"ttou"|"urg"|"xcpu"|"xfsz"|"vtalrm"|
             "prof"|"winch"|"io"|"pwr"|"sys"|"emt"|"exists")
  signal_set   := set=<signal> | '(' <signal> ([,]<signal>)* ')'


it does not currently follow the peer=() format, and there is some question
as to whether it should or not. Input welcome.

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Seth Arnold <seth.arnold@canonical.com>
This commit is contained in:
John Johansen
2014-04-23 11:35:29 -07:00
parent b10965b78e
commit b222731c4f
11 changed files with 476 additions and 12 deletions
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5
parser/parser.h
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@@ -298,6 +298,7 @@ extern int kernel_supports_policydb;
extern int kernel_supports_diff_encode;
extern int kernel_supports_mount;
extern int kernel_supports_dbus;
extern int kernel_supports_signal;
extern int conf_verbose;
extern int conf_quiet;
extern int names_only;
@@ -330,7 +331,9 @@ extern int yylex(void);
extern const char *basedir;
/* parser_regex.c */
extern const char *default_match_pattern;
#define default_match_pattern "[^\\000]*"
#define anyone_match_pattern "[^\\000]+"
extern pattern_t convert_aaregex_to_pcre(const char *aare, int anchor,
std::string& pcre, int *first_re_pos);
extern int build_list_val_expr(std::string& buffer, struct value_list *list);