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util/nvmutil: more reliable TMPDIR handling

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more portable

Signed-off-by: Leah Rowe <leah@libreboot.org>
This commit is contained in:
Leah Rowe
2026-03-16 16:10:25 +00:00
parent 0e0fcd5a81
commit 24c4e715e6
1 changed files with 20 additions and 1 deletions
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util/nvmutil/nvmutil.c
+20 -1
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@@ -477,6 +477,7 @@ static char *new_tmpfile(int *fd, int local, const char *path);
static int x_i_mkstemp(char *template);
static char *x_c_strrchr(const char *s, int c);
static int x_i_rename(const char *src, const char *dst);
static char *x_c_tmpdir(void);
/*
* Sizes in bytes:
@@ -2889,7 +2890,7 @@ new_tmpfile(int *fd, int local, const char *path)
*/
tmpdir_len = sizeof(default_tmpname);
} else {
base = getenv("TMPDIR");
base = x_c_tmpdir();
if (base == NULL)
base = tmp_default;
@@ -3075,3 +3076,21 @@ x_i_rename(const char *src, const char *dst)
return 0;
}
static char *
x_c_tmpdir(void)
{
char *t;
t = getenv("TMPDIR");
if (t && *t)
return t;
if (access("/tmp", W_OK) == 0)
return "/tmp";
if (access("/var/tmp", W_OK) == 0)
return "/var/tmp";
return ".";
}