diff options
Diffstat (limited to 'libc/misc/internals/tempname.c')
| -rw-r--r-- | libc/misc/internals/tempname.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/libc/misc/internals/tempname.c b/libc/misc/internals/tempname.c index edcc31c1a..7654eb433 100644 --- a/libc/misc/internals/tempname.c +++ b/libc/misc/internals/tempname.c @@ -163,10 +163,10 @@ static void brain_damaged_fillrand(unsigned char *buf, unsigned int len) } } -/* Generate a temporary file name based on TMPL. TMPL must match the - rules for mk[s]temp (i.e. end in "XXXXXX"). The name constructed - does not exist at the time of the call to __gen_tempname. TMPL is - overwritten with the result. +/* Generate a temporary file name based on TMPL. TMPL must match the + rules for mk[s]temp[s] (i.e. end in "prefixXXXXXXsuffix"). The name + constructed does not exist at the time of the call to __gen_tempname. + TMPL is overwritten with the result. KIND may be one of: __GT_NOCREATE: simply verify that the name does not exist @@ -177,7 +177,8 @@ static void brain_damaged_fillrand(unsigned char *buf, unsigned int len) __GT_DIR: create a directory with given mode. */ -int attribute_hidden __gen_tempname (char *tmpl, int kind, int flags, mode_t mode) +int attribute_hidden __gen_tempname (char *tmpl, int kind, int flags, + int suffixlen, mode_t mode) { char *XXXXXX; unsigned int i; @@ -187,8 +188,9 @@ int attribute_hidden __gen_tempname (char *tmpl, int kind, int flags, mode_t mod len = strlen (tmpl); /* This is where the Xs start. */ - XXXXXX = tmpl + len - 6; - if (len < 6 || strcmp (XXXXXX, "XXXXXX")) + XXXXXX = tmpl + len - 6 - suffixlen; + if (len < 6 || suffixlen < 0 || suffixlen > len - 6 + || strncmp (XXXXXX, "XXXXXX", 6)) { __set_errno (EINVAL); return -1; |