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Refactor pledge() to be more configurable

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The earlier iterations did too much guesswork when it came to things
like stderr logging and syscall origin verification. This change will
make things more conformant to existing practices. The __pledge_mode
extension now can be configured in a better way.

There's also a new `-q` flag added to pledge.com, e.g.

    o//tool/build/pledge.com -qv. ls

Is a good way to disable warnings about `tty` access attempts.
This commit is contained in:
Justine Tunney 2022-08-11 11:27:25 -07:00
parent 6b8b58fdf5
commit 625aa365f1
36 changed files with 203 additions and 168 deletions
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15
libc/calls/pledge.h
View file

@ -1,15 +1,16 @@
#ifndef COSMOPOLITAN_LIBC_CALLS_PLEDGE_H_
#define COSMOPOLITAN_LIBC_CALLS_PLEDGE_H_
#define PLEDGE_PENALTY_KILL_THREAD 0x0000
#define PLEDGE_PENALTY_KILL_PROCESS 0x0001
#define PLEDGE_PENALTY_RETURN_EPERM 0x0002
#define PLEDGE_PENALTY_MASK 0x000f
#define PLEDGE_STDERR_LOGGING 0x0010
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
enum PledgeMode {
kPledgeModeKillThread,
kPledgeModeKillProcess,
kPledgeModeErrno,
};
extern enum PledgeMode __pledge_mode;
extern int __pledge_mode;
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */