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Include new arbitrary limits if not already defined

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Although GNU/Hurd supports unlimited path lengths
only bounded by available memory, for now we can use
an arbitrary limit on PATH_MAX that matches what POSIX requires.
We don't have bandwidth to fix this properly right now.

Author: Manolo de Medici <manolo.demedici@gmail.com>
Signed-off-by: Damien Zammit <damien@zamaudio.com>
Link: https://lore.kernel.org/r/20260208055858.2166524-2-damien@zamaudio.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Manolo de Medici
2026-02-08 05:59:19 +00:00
committed by Paolo Bonzini
parent 88d39a2937
commit ff8d820da8
1 changed files with 11 additions and 4 deletions
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15
include/qemu/osdep.h
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@@ -384,6 +384,17 @@ void QEMU_ERROR("code path is reachable")
#define TIME_MAX TYPE_MAXIMUM(time_t)
#endif
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif
/*
* Use the same value as Linux for now.
*/
#ifndef IOV_MAX
#define IOV_MAX 1024
#endif
/* Mac OSX has a <stdint.h> bug that incorrectly defines SIZE_MAX with
* the wrong type. Our replacement isn't usable in preprocessor
* expressions, but it is sufficient for our needs. */
@@ -661,10 +672,6 @@ struct iovec {
void *iov_base;
size_t iov_len;
};
/*
* Use the same value as Linux for now.
*/
#define IOV_MAX 1024
ssize_t readv(int fd, const struct iovec *iov, int iov_cnt);
ssize_t writev(int fd, const struct iovec *iov, int iov_cnt);