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util/nvmutil: portable fchmod

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and with that, now the code compiles on gcc
with -std=c90 -pedantic

with -Werror and -Wall -Wextra

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-16 16:52:28 +00:00
parent fb4f263005
commit 849a73012e
1 changed files with 41 additions and 1 deletions
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42
util/nvmutil/nvmutil.c
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@@ -491,6 +491,7 @@ static void *x_v_memcpy(void *dst,
const void *src, unsigned long n);
static int x_i_memcmp(const void *a,
const void *b, unsigned long n);
static int x_i_fchmod(int fd, mode_t mode);
/*
* Sizes in bytes:
@@ -2954,7 +2955,7 @@ new_tmpfile(int *fd, int local, const char *path)
if (fd_tmp == -1)
goto err_new_tmpfile;
if (fchmod(fd_tmp, 0600) == -1)
if (x_i_fchmod(fd_tmp, 0600) == -1)
goto err_new_tmpfile;
if (lock_file(fd_tmp) == -1)
@@ -3175,3 +3176,42 @@ x_i_memcmp(const void *a, const void *b, unsigned long n)
return 0;
}
static int
x_i_fchmod(int fd, mode_t mode)
{
char path[32];
char tmp[16];
int i = 0;
int j = 0;
int n;
/* build "/dev/fd/" */
path[i++] = '/';
path[i++] = 'd';
path[i++] = 'e';
path[i++] = 'v';
path[i++] = '/';
path[i++] = 'f';
path[i++] = 'd';
path[i++] = '/';
/* convert fd to decimal */
n = fd;
if (n == 0) {
path[i++] = '0';
} else {
while (n > 0) {
tmp[j++] = (char)('0' + (n % 10));
n /= 10;
}
while (j > 0)
path[i++] = tmp[--j];
}
path[i] = '\0';
return chmod(path, mode);
}