cosmopolitan/libc
Jōshin 7faffde303
Fix buffer overflow in TryPath (#1035)
Missed this when changing the code back to be like the old version.
com is now a parameter.

The only plausible way to trigger this would be to pass a loader
pathname close to MAX_PATH characters long, and then remove that
path prior to the first sys_faccessat.
2023-12-18 23:02:16 -05:00
..
calls Fix buffer overflow in TryPath (#1035) 2023-12-18 23:02:16 -05:00
crt more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
dlopen more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
dns more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
elf more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
fmt more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
integral Always use compiler builtin for offsetof() 2023-12-07 14:20:12 -08:00
intrin more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
irq more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
isystem Add libresolv from Musl Libc 2023-12-08 20:04:10 -08:00
log more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
mem more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
nexgen32e more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
nt more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
proc more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
runtime more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
sock more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
stdio more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
str more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
sysv more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
testlib more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
thread more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
time more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
tinymath Revert retabbing of net/http and tinymath (#1020) 2023-12-16 23:59:11 -05:00
vga more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
x more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
ar.h Reduce header complexity 2023-11-28 14:39:42 -08:00
assert.h Improve debug binary location detection 2023-11-17 00:07:39 -08:00
atomic.h
BUILD.mk more modeline errata (#1019) 2023-12-16 23:07:10 -05:00
complex.h Reduce header complexity 2023-11-28 14:39:42 -08:00
cosmo.h Reduce header complexity 2023-11-28 14:39:42 -08:00
cxxabi.h Add more fixes for new cosmocc toolchain 2023-11-11 23:28:19 -08:00
dce.h Remove bool from public headers 2023-11-15 20:58:46 -08:00
disclaimer.inc
dos.internal.h Introduce #include <cosmo.h> to toolchain users 2023-06-09 18:03:05 -07:00
empty.s Do some basic build tuning 2023-05-10 04:20:46 -07:00
errno.h Reduce header complexity 2023-11-28 14:39:42 -08:00
imag.internal.h Remove evil constants from cosmopolitan.h 2022-12-17 00:42:45 -08:00
inttypes.h Fix issues for latest GCC toolchain 2023-10-11 14:54:42 -07:00
iso646.internal.h
limits.h Make improvements 2023-10-08 08:59:53 -07:00
literal.h Get GNU MPFR and MPC tests to pass 2023-08-21 15:05:10 -07:00
mach.internal.h Reduce header complexity 2023-11-28 14:39:42 -08:00
macho.internal.h Fiddle around with Mach-O 2023-05-20 04:13:49 -07:00
macros.internal.h Make improvements 2023-10-03 06:17:16 -07:00
math.h Reduce header complexity 2023-11-28 14:39:42 -08:00
notice.inc
notice.internal.h
paths.h
README.md
serialize.h Reduce header complexity 2023-11-28 14:39:42 -08:00
stdalign.internal.h
stdbool.h Make fatcosmocc good enough to build ncurses 6.4 2023-08-12 22:30:05 -07:00
stdckdint.h Reduce header complexity 2023-11-28 14:39:42 -08:00
stdlib.h Reduce header complexity 2023-11-28 14:39:42 -08:00
temp.h Reduce header complexity 2023-11-28 14:39:42 -08:00
testlib-test.txt Fix some zipos directory related bugs 2023-09-19 02:30:42 -07:00
type2str.h Improve new C23 checked arithmetic feature 2023-06-16 15:32:18 -07:00
zip.internal.h Reduce header complexity 2023-11-28 14:39:42 -08:00

Cosmopolitan Standard Library

This directory defines static archives defining functions, like printf(), mmap(), win32, etc. Please note that the Cosmopolitan build configuration doesn't link any C/C++ library dependencies by default, so you still have the flexibility to choose the one provided by your system. If you'd prefer Cosmopolitan, just add $(LIBC) and $(CRT) to your linker arguments.

Your library is compromised of many bite-sized static archives. We use the checkdeps tool to guarantee that the contents of the archives are organized in a logical way that's easy to use with or without our makefile infrastructure, since there's no cyclic dependencies.

The Cosmopolitan Library exports only the most stable canonical system calls for all supported operating systems, regardless of which platform is used for compilation. We polyfill many of the APIs, e.g. read(), write() so they work consistently everywhere while other apis, e.g. CreateWindowEx(), might only work on one platform, in which case they become no-op functions on others.

Cosmopolitan polyfill wrappers will usually use the dollar sign naming convention, so they may be bypassed when necessary. This same convention is used when multiple implementations of string library and other performance-critical function are provided to allow Cosmopolitan to go fast on both old and newer computers.

We take an approach to configuration that relies heavily on the compiler's dead code elimination pass (libc/dce.h). Most of the code is written so that, for example, folks not wanting support for OpenBSD can flip a bit in SUPPORT_VECTOR and that code will be omitted from the build. The same is true for builds that are tuned using -march=native which effectively asks the library to not include runtime support hooks for x86 processors older than what you use.

Please note that, unlike Cygwin or MinGW, Cosmopolitan does not achieve broad support by bolting on a POSIX emulation layer. We do nothing more than (in most cases) stateless API translations that get you 90% of the way there in a fast lightweight manner. We therefore can't address some of the subtle differences, such as the nuances of absolute paths on Windows. Our approach could be compared to something more along the lines of, "the Russians just used a pencil to write in space", versus spending millions researching a pen like NASA.