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Fix bugs in termios library and cleanup code

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This change fixes an issue with the tcflow() magic numbers that was
causing bash to freeze up on Linux. While auditing termios polyfills,
several other issues were identified with XNU/BSD compatibility.

Out of an abundance of caution this change undefines as much surface
area from libc/calls/struct/termios.h as possible, so that autoconf
scripts are less likely to detect non-POSIX teletypewriter APIs that
haven't been polyfilled by Cosmopolitan.

This is a *breaking change* for your static archives in /opt/cosmos if
you use the cosmocc toolchain. That's because this change disables the
ioctl() undiamonding trick for code outside the monorepo, specifically
because it'll lead to brittle ABI breakages like this. If you're using
the cosmocc toolchain, you'll need to rebuild libraries like ncurses,
readline, etc. Yes diamonds cause bloat. To work around that, consider
using tcgetwinsize() instead of ioctl(TIOCGWINSZ) since it'll help you
avoid pulling every single ioctl-related polyfill into the linkage.

The cosmocc script was specifying -DNDEBUG for some reason. It's fixed.
This commit is contained in:
Justine Tunney 2023-06-14 17:02:57 -07:00
parent 06b749ae03
commit 4778cd4d27
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
187 changed files with 1025 additions and 1848 deletions
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20
libc/sysv/consts/o.h
View file

@ -1,9 +1,14 @@
#ifndef COSMOPOLITAN_LIBC_SYSV_CONSTS_O_H_
#define COSMOPOLITAN_LIBC_SYSV_CONSTS_O_H_
#define O_RDONLY 0
#define O_WRONLY 1
#define O_RDWR 2
#define O_ACCMODE 3
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
extern const unsigned O_ACCMODE;
extern const unsigned O_APPEND;
extern const unsigned O_ASYNC;
extern const unsigned O_CLOEXEC;
@ -25,8 +30,6 @@ extern const unsigned O_NOFOLLOW_ANY;
extern const unsigned O_NONBLOCK;
extern const unsigned O_PATH;
extern const unsigned O_RANDOM;
extern const unsigned O_RDONLY;
extern const unsigned O_RDWR;
extern const unsigned O_RSYNC;
extern const unsigned O_SEARCH;
extern const unsigned O_SEQUENTIAL;
@ -37,15 +40,6 @@ extern const unsigned O_TMPFILE;
extern const unsigned O_TRUNC;
extern const unsigned O_TTY_INIT;
extern const unsigned O_VERIFY;
extern const unsigned O_WRONLY;
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#define O_RDONLY 0
#define O_WRONLY 1
#define O_RDWR 2
#define O_ACCMODE 3
#define O_APPEND O_APPEND
#define O_ASYNC O_ASYNC
@ -89,4 +83,6 @@ COSMOPOLITAN_C_END_
#define __tmpcosmo_O_SYNC -282123817
#define __tmpcosmo_O_TRUNC 924355570
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_SYSV_CONSTS_O_H_ */