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Fix handling of paths with dirfd on Windows

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This change fixes an issue with all system calls ending with *at(), when
the caller passes `dirfd != AT_FDCWD` and an absolute path. It's because
the old code was turning paths like C:\bin\ls into \\C:\bin\ls\C:\bin\ls
after being converted from paths like /C/bin/ls. I noticed this when the
Emacs dired mode stopped working. It's unclear if it's a regression with
Cosmopolitan Libc or if this was introduced by the Emacs v29 upgrade. It
also impacted posix_spawn() for which a newly minted example now exists.
This commit is contained in:
Justine Tunney 2024-09-01 16:35:48 -07:00
parent a089c07ddc
commit 39e7f24947
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GPG key ID: BE714B4575D6E328
10 changed files with 373 additions and 46 deletions
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6
libc/proc/posix_spawnattr_setrlimit.c
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@ -26,14 +26,14 @@
/**
* Sets resource limit on spawned process.
*
* You also need to pass `POSIX_SPAWN_SETRLIMIT` to
* You also need to pass `POSIX_SPAWN_SETRLIMIT_NP` to
* posix_spawnattr_setflags() for it to take effect.
*
* @return 0 on success, or errno on error
* @raise EINVAL if resource is invalid
*/
int posix_spawnattr_setrlimit(posix_spawnattr_t *attr, int resource,
const struct rlimit *rlim) {
int posix_spawnattr_setrlimit_np(posix_spawnattr_t *attr, int resource,
const struct rlimit *rlim) {
if (0 <= resource && resource < MIN(RLIM_NLIMITS, ARRAYLEN((*attr)->rlim))) {
(*attr)->rlimset |= 1u << resource;
(*attr)->rlim[resource] = *rlim;