Viewing file:  pr20933.c (1.78 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2" } */
extern __SIZE_TYPE__ strlen (__const char *__s)
__attribute__ ((__nothrow__)) __attribute__ ((__pure__)) __attribute__ ((__nonnull__ (1)));
extern char *strcpy (char *__restrict __dest, __const char *__restrict __src)
__attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1, 2)));
extern char *getenv (__const char *__name) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1)));
extern int access (__const char *__name, int __type) __attribute__ ((__nothrow__)) __attribute__ ((__nonnull__ (1)));
extern void * xmalloc (__SIZE_TYPE__) __attribute__ ((__malloc__));
static __inline__ const char *
try (const char *dir, const char *base)
{
if (base != 0)
return base;
if (dir != 0
&& access (dir, 4 | 2 | 1) == 0)
return dir;
return 0;
}
static const char tmp[] = { '/', 't', 'm', 'p', 0 };
static const char usrtmp[] =
{ '/', 'u', 's', 'r', '/', 't', 'm', 'p', 0 };
static const char vartmp[] =
{ '/', 'v', 'a', 'r', '/', 't', 'm', 'p', 0 };
static char *memoized_tmpdir;
char *
choose_tmpdir (void)
{
const char *base = 0;
char *tmpdir;
unsigned int len;
if (memoized_tmpdir)
return memoized_tmpdir;
base = try (getenv ("TMPDIR"), base);
base = try (getenv ("TMP"), base);
base = try (getenv ("TEMP"), base);
base = try ("/tmp", base);
base = try (vartmp, base);
base = try (usrtmp, base);
base = try (tmp, base);
if (base == 0)
base = ".";
len = strlen (base);
tmpdir = xmalloc (len + 2);
strcpy (tmpdir, base);
/* Alias analysis was associating read-only memory tags to pointers
that are not read-only. We would then not issue any V_MAY_DEF in
this store. */
tmpdir[len] = '/';
tmpdir[len+1] = '\0';
memoized_tmpdir = tmpdir;
return tmpdir;
}
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