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util/nvmutil: don't use mktemp

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Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-16 16:35:06 +00:00
parent f365969d34
commit ad5a4771bf
1 changed files with 25 additions and 4 deletions
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util/nvmutil/nvmutil.c
+25 -4
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@@ -304,6 +304,10 @@ typedef char static_assert_off_t_is_32[(sizeof(off_t) >= 4) ? 1 : -1];
#define O_BINARY 0 #define O_BINARY 0
#endif #endif
#ifndef O_EXCL
#define O_EXCL 0
#endif
#ifndef O_NONBLOCK #ifndef O_NONBLOCK
#define O_NONBLOCK 0 #define O_NONBLOCK 0
#endif #endif
@@ -3001,15 +3005,32 @@ static int
x_i_mkstemp(char *template) x_i_mkstemp(char *template)
{ {
int fd; int fd;
int i; int i, j;
unsigned long len;
char *p;
for (i = 0; i < 10; i++) { char ch[] = "abcdefghijklmnopqrstuvwxyz0123456789";
if (mktemp(template) == NULL)
return -1; len = xstrxlen(template, PATH_LEN);
/* find trailing XXXXXX */
if (len < 6)
return -1;
p = template + len - 6;
for (i = 0; i < 100; i++) {
for (j = 0; j < 6; j++)
p[j] = ch[rhex() & 31];
fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600); fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600);
if (fd >= 0) if (fd >= 0)
return fd; return fd;
if (errno != EEXIST)
return -1;
} }
errno = EEXIST; errno = EEXIST;