Robustify parsing of numbers from strings
* defs.h (string_to_uint): New prototype.
* util.c (string_to_uint): New function.
* strace.c (error_opt_arg): New function.
(process_opt_p_list): Use string_to_uint instead of atoi.
Terminate in case of invalid process id.
(init): Use string_to_uint instead of atoi.
Use error_opt_arg in case of invalid option argument.
* syscall.c (qual_syscall, qual_signal, qual_desc): Use string_to_uint
instead of atoi.
diff --git a/defs.h b/defs.h
index e46e230..3348400 100644
--- a/defs.h
+++ b/defs.h
@@ -489,6 +489,8 @@
extern const char *xlookup(const struct xlat *, int);
+extern int string_to_uint(const char *str);
+
#if HAVE_LONG_LONG
/* _l refers to the lower numbered u_arg,
* _h refers to the higher numbered u_arg