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Make improvements

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- Fix build flakes
- Polyfill SIGWINCH on Windows
- Fix an execve issue on Windows
- Make strerror show more information
- Improve cmd.exe setup/teardown on Windows
- Support bracketed paste mode in Blinkenlights
- Show keyboard shortcuts in Blinkenlights status bar
- Fixed copy_file_range() and copyfile() w/ zip filesystem
- Size optimize GetDosArgv() to keep life.com 12kb in size
- Improve Blinkenlights ability to load weird ELF executables
- Fix program_executable_name and add GetInterpreterExecutableName
- Make Python in tiny mode fail better if docstrings are requested
- Update Python test exclusions in tiny* modes such as tinylinux
- Add bulletproof unbreakable kprintf() troubleshooting function
- Remove "oldskool" keyword from ape.S for virus scanners
- Fix issue that caused backtraces to not print sometimes
- Improve Blinkenlights serial uart character i/o
- Make clock_gettime() not clobber errno on xnu
- Improve sha256 cpuid check for old computers
- Integrate some bestline linenoise fixes
- Show runit process names better in htop
- Remove SIGPIPE from ShowCrashReports()
- Make realpath() not clobber errno
- Avoid attaching GDB on non-Linux
- Improve img.com example
This commit is contained in:
Justine Tunney 2022-03-16 13:33:13 -07:00
parent 2a938b3eaa
commit b45d50b690
194 changed files with 4881 additions and 2966 deletions
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29
libc/calls/realpath.c
View file

@ -25,13 +25,14 @@
│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
│ │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/bits/bits.h"
#include "libc/bits/safemacros.internal.h"
#include "libc/bits/weaken.h"
#include "libc/calls/calls.h"
#include "libc/calls/sysdebug.internal.h"
#include "libc/errno.h"
#include "libc/limits.h"
#include "libc/log/backtrace.internal.h"
#include "libc/mem/mem.h"
#include "libc/str/str.h"
#include "libc/sysv/errfuns.h"
@ -73,12 +74,13 @@ static char *ResolvePath(char *d, const char *s, size_t n)
* symbolic link then it's resolved.
*
* @param resolved needs PATH_MAX bytes or NULL to use malloc()
* @return resolved or NULL w/ errno
*/
char *realpath(const char *filename, char *resolved)
{
ssize_t k;
int up, check_dir=0;
size_t p, q, l, l0, cnt=0, nup=0;
ssize_t rc;
int e, up, check_dir=0;
size_t k, p, q, l, l0, cnt=0, nup=0;
char output[PATH_MAX], stack[PATH_MAX+1], *z;
if (!filename) {
@ -160,15 +162,10 @@ restart:
* directories, processing .. can skip readlink. */
if (!check_dir) goto skip_readlink;
}
k = readlink(output, stack, p);
if (k<0) SYSDEBUG("realpath readlink failed %d", (long)errno);
if (k==p) goto toolong;
if (!k) {
errno = ENOENT;
return 0;
}
if (k<0) {
e = errno;
if ((rc = readlink(output, stack, p)) == -1) {
if (errno != EINVAL) return 0;
errno = e; /* [jart] undirty errno if not a symlink */
skip_readlink:
check_dir = 0;
if (up) {
@ -180,6 +177,14 @@ skip_readlink:
check_dir = stack[p];
continue;
}
k = rc;
assert(k <= p);
if (k==p)
goto toolong;
if (!k) {
errno = ENOENT;
return 0;
}
if (++cnt == SYMLOOP_MAX) {
errno = ELOOP;
return 0;