On Mon, Oct 18, 1999 at 07:14:03 +0000, Bernhard Rieder wrote:
> When calling mktemp I always get a segfault. This short program was used
> for testing.
>
> #include <stdlib.h>
>
> char *template = "/tmp/tmpfileXXXXXX";
>
> int main () {
> return printf("%s\n", mktemp(template));
> }
Quoting the fine manual `info libc "Temporary Files"':
: *Note:* Because `mktemp' and `mkstemp' modify the template string,
:you _must not_ pass string constants to them. String constants are
:normally in read-only storage, so your program would crash when `mktemp' or
:`mkstemp' tried to modify the string.
> $ gcc -o test test.c
As a workaround, you can compile -fwritable-strings. The proper solution is
to ensure that *template is writable; there's bound to be a clean way to do
that but I don't have one handy (except via malloc and strcpy).
HTH,
Ray
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