This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
[PATCH 6/9] Add __vsyslog_internal, with same flags as __v*printf_internal.
- From: Zack Weinberg <zackw at panix dot com>
- To: libc-alpha at sourceware dot org
- Date: Wed, 7 Mar 2018 14:32:02 -0500
- Subject: [PATCH 6/9] Add __vsyslog_internal, with same flags as __v*printf_internal.
- Authentication-results: sourceware.org; auth=none
- References: <20180307193205.4751-1-zackw@panix.com>
__nldbl___vsyslog_chk will ultimately want to pass PRINTF_LDBL_IS_DBL
down to __vfprintf_internal *as well as* possibly setting PRINTF_FORTIFY.
To make that possible, we need a __vsyslog_internal that takes the
same flags as printf. The code in misc/syslog.c does also get a
little simpler.
* misc/syslog.c: Include libioP.h, not iolibio.h.
(__vsyslog_internal): New function with the former body of
__vsyslog_chk; takes mode_flags argument same as
__v*printf_internal. Call __vfprintf_internal directly.
(__vsyslog_chk): Now a wrapper around __vsyslog_internal.
Remove libc_hidden_def.
(__syslog, __syslog_chk): Use __vsyslog_internal.
(__vsyslog): Move to just below __syslog. Use __vsyslog_internal.
* include/sys/syslog.h: Add multiple inclusion guard.
Add prototype for __vsyslog_internal.
Remove libc_hidden_proto for __vsyslog_chk.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.c (__nldbl___vsyslog_chk):
Use __vsyslog_internal.
---
include/sys/syslog.h | 15 +++++++++++---
misc/syslog.c | 35 ++++++++++++++++++---------------
sysdeps/ieee754/ldbl-opt/nldbl-compat.c | 2 +-
3 files changed, 32 insertions(+), 20 deletions(-)
diff --git a/include/sys/syslog.h b/include/sys/syslog.h
index 3be3189ed1..459ca70746 100644
--- a/include/sys/syslog.h
+++ b/include/sys/syslog.h
@@ -1,11 +1,20 @@
+#ifndef _LIBC_SYS_SYSLOG_H
+#define _LIBC_SYS_SYSLOG_H 1
#include <misc/sys/syslog.h>
-
#ifndef _ISOMAC
+
libc_hidden_proto (syslog)
libc_hidden_proto (vsyslog)
+/* __vsyslog_internal uses the same mode_flags bits as
+ __v*printf_internal; see libio/libioP.h. */
+extern void __vsyslog_internal (int pri, const char *fmt, __gnuc_va_list ap,
+ unsigned int mode_flags)
+ __attribute__ ((__format__ (__printf__, 2, 0)));
+
extern void __vsyslog_chk (int __pri, int __flag, const char *__fmt,
__gnuc_va_list __ap)
__attribute__ ((__format__ (__printf__, 3, 0)));
-libc_hidden_proto (__vsyslog_chk)
-#endif
+
+#endif /* _ISOMAC */
+#endif /* syslog.h */
diff --git a/misc/syslog.c b/misc/syslog.c
index 644dbe80ec..eb1283a604 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -53,7 +53,7 @@ static char sccsid[] = "@(#)syslog.c 8.4 (Berkeley) 3/18/94";
#include <stdarg.h>
-#include <libio/iolibio.h>
+#include <libio/libioP.h>
#include <math_ldbl_opt.h>
#include <kernel-features.h>
@@ -114,24 +114,39 @@ __syslog(int pri, const char *fmt, ...)
va_list ap;
va_start(ap, fmt);
- __vsyslog_chk(pri, -1, fmt, ap);
+ __vsyslog_internal(pri, fmt, ap, 0);
va_end(ap);
}
ldbl_hidden_def (__syslog, syslog)
ldbl_strong_alias (__syslog, syslog)
+void
+__vsyslog(int pri, const char *fmt, va_list ap)
+{
+ __vsyslog_internal(pri, fmt, ap, 0);
+}
+ldbl_hidden_def (__vsyslog, vsyslog)
+ldbl_weak_alias (__vsyslog, vsyslog)
+
void
__syslog_chk(int pri, int flag, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
- __vsyslog_chk(pri, flag, fmt, ap);
+ __vsyslog_internal(pri, fmt, ap, (flag > 0) ? PRINTF_FORTIFY : 0);
va_end(ap);
}
void
__vsyslog_chk(int pri, int flag, const char *fmt, va_list ap)
+{
+ __vsyslog_internal(pri, fmt, ap, (flag > 0) ? PRINTF_FORTIFY : 0);
+}
+
+void
+__vsyslog_internal(int pri, const char *fmt, va_list ap,
+ unsigned int mode_flags)
{
struct tm now_tm;
time_t now;
@@ -216,10 +231,7 @@ __vsyslog_chk(int pri, int flag, const char *fmt, va_list ap)
/* We have the header. Print the user's format into the
buffer. */
- if (flag == -1)
- vfprintf (f, fmt, ap);
- else
- __vfprintf_chk (f, flag, fmt, ap);
+ __vfprintf_internal (f, fmt, ap, mode_flags);
/* Close the memory stream; this will finalize the data
into a malloc'd buffer in BUF. */
@@ -316,15 +328,6 @@ __vsyslog_chk(int pri, int flag, const char *fmt, va_list ap)
if (buf != failbuf)
free (buf);
}
-libc_hidden_def (__vsyslog_chk)
-
-void
-__vsyslog(int pri, const char *fmt, va_list ap)
-{
- __vsyslog_chk (pri, -1, fmt, ap);
-}
-ldbl_hidden_def (__vsyslog, vsyslog)
-ldbl_weak_alias (__vsyslog, vsyslog)
static struct sockaddr_un SyslogAddr; /* AF_UNIX address of local logger */
diff --git a/sysdeps/ieee754/ldbl-opt/nldbl-compat.c b/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
index 7e8af80d63..f00eb55eb5 100644
--- a/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
+++ b/sysdeps/ieee754/ldbl-opt/nldbl-compat.c
@@ -842,7 +842,7 @@ attribute_compat_text_section
__nldbl___vsyslog_chk (int pri, int flag, const char *fmt, va_list ap)
{
set_no_long_double ();
- __vsyslog_chk (pri, flag, fmt, ap);
+ __vsyslog_internal (pri, fmt, ap, (flag > 0) ? PRINTF_FORTIFY : 0);
clear_no_long_double ();
}
libc_hidden_def (__nldbl___vsyslog_chk)
--
2.16.2