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Avoid passing NULL to printf %s specifier

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This commit is contained in:
John Levon 2009-01-15 17:54:20 +00:00
parent c7095a4b4c
commit 4d713eabf5
3 changed files with 18 additions and 5 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Thu Jan 15 17:29:19 GMT 2009 John Levon <levon@movementarian.org>
* src/internal.h:
* src/libvirt.c: Avoid passing NULL to printf %s specifier
Thu Jan 15 15:11:35 GMT 2009 John Levon <levon@movementarian.org>
* src/xend_internal.c: Improve xend_get error message

8
src/internal.h
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@ -7,6 +7,7 @@
#include <errno.h>
#include <limits.h>
#include <verify.h>
#ifdef HAVE_SYS_SYSLIMITS_H
#include <sys/syslimits.h>
@ -115,6 +116,13 @@
#define ATTRIBUTE_RETURN_CHECK
#endif /* __GNUC__ */
/*
* Use this when passing possibly-NULL strings to printf-a-likes.
*/
#define NULLSTR(s) \
((void)verify_true(sizeof *(s) == sizeof (char)), \
(s) ? (s) : "(null)")
/**
* TODO:
*

10
src/libvirt.c
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@ -852,10 +852,10 @@ do_open (const char *name,
" port %d\n"
" path %s\n",
name,
ret->uri->scheme, ret->uri->opaque,
ret->uri->authority, ret->uri->server,
ret->uri->user, ret->uri->port,
ret->uri->path);
NULLSTR(ret->uri->scheme), NULLSTR(ret->uri->opaque),
NULLSTR(ret->uri->authority), NULLSTR(ret->uri->server),
NULLSTR(ret->uri->user), ret->uri->port,
NULLSTR(ret->uri->path));
} else {
DEBUG0("no name, allowing driver auto-select");
}
@ -1044,7 +1044,7 @@ virConnectOpenAuth(const char *name,
if (virInitialize() < 0)
return NULL;
DEBUG("name=%s, auth=%p, flags=%d", name, auth, flags);
DEBUG("name=%s, auth=%p, flags=%d", NULLSTR(name), auth, flags);
return do_open (name, auth, flags);
}