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util/nvmutil: don't use SSIZE_MAX (not portable)

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some old systems don't have ssize_t or size_t

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-16 15:43:06 +00:00
parent d2d2fb778a
commit 7a66c78016
1 changed files with 5 additions and 5 deletions
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10
util/nvmutil/nvmutil.c
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@@ -543,8 +543,8 @@ static const char *mac_str = rmac;
static const char *fname = NULL;
static const char *argv0;
#ifndef SSIZE_MAX
#define SSIZE_MAX ((ssize_t)(~((size_t)1 << (sizeof(ssize_t)*CHAR_BIT-1))))
#ifndef X_LONG_MAX
#define X_LONG_MAX ((long)(~((long)1 << (sizeof(long)*CHAR_BIT-1))))
#endif
/*
@@ -2586,7 +2586,7 @@ io_args(int fd, void *mem, size_t nrw,
goto err_io_args;
/* prevent overflow */
if (nrw > (size_t)SSIZE_MAX)
if (nrw > (size_t)X_LONG_MAX)
goto err_io_args;
/* prevent overflow */
@@ -2639,14 +2639,14 @@ rw_over_nrw(ssize_t r, size_t nrw)
if (r == -1)
return r;
if ((size_t)r > SSIZE_MAX) {
if ((size_t)r > X_LONG_MAX) {
/*
* Theoretical buggy libc
* check. Extremely academic.
*
* Specifications never
* allow this return value
* to exceed SSIZE_MAX, but
* to exceed SSIZE_T, but
* spec != implementation
*
* Check this after using