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* misc/bits/syslog.h: New file.

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* misc/sys/syslog.h: Include <bits/syslog.h> for fortification.
	* misc/Makefile (headers): Add bits/syslog.h.
	* include/sys/syslog.h: Add __vsyslog_chk prototype and hidden_proto.
	* sysdeps/generic/syslog.c: Change vsyslog function to __vsyslog_chk.
	Call __vfprintf_chk if necessary.  Make vsyslog a wrapper.  Add
	__syslog_chk.
	* misc/Versions: Export __syslog_chk and __vsyslog_chk.

	* nis/nis_xdr.c: Help gcc to avoid generating unnecessary wrapper
	functions.
This commit is contained in:
Ulrich Drepper 2005-07-30 06:00:43 +00:00
parent 155c581323
commit 29c21e4900
6 changed files with 55 additions and 20 deletions
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14
ChangeLog
View File

@ -1,10 +1,22 @@
2005-07-29 Ulrich Drepper <drepper@redhat.com>
* misc/bits/syslog.h: New file.
* misc/sys/syslog.h: Include <bits/syslog.h> for fortification.
* misc/Makefile (headers): Add bits/syslog.h.
* include/sys/syslog.h: Add __vsyslog_chk prototype and hidden_proto.
* sysdeps/generic/syslog.c: Change vsyslog function to __vsyslog_chk.
Call __vfprintf_chk if necessary. Make vsyslog a wrapper. Add
__syslog_chk.
* misc/Versions: Export __syslog_chk and __vsyslog_chk.
2005-07-28 Thomas Schwinge <schwinge@nic-nac-project.de>
* misc/error.c [_LIBC]: Include <stdbool.h> and <stdint.h>.
2005-07-28 Ulrich Drepper <drepper@redhat.com>
* nis/nis_xdr.c: Help gcc to generate unnecessary wrapper functions.
* nis/nis_xdr.c: Help gcc to avoid generating unnecessary wrapper
functions.
2005-07-28 Jakub Jelinek <jakub@redhat.com>

5
include/sys/syslog.h
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@ -2,3 +2,8 @@
libc_hidden_proto (syslog)
libc_hidden_proto (vsyslog)
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)

2
misc/Makefile
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@ -29,7 +29,7 @@ headers := sys/uio.h bits/uio.h sys/ioctl.h bits/ioctls.h bits/ioctl-types.h \
sys/mman.h sys/param.h fstab.h mntent.h search.h err.h error.h \
sys/queue.h sysexits.h syscall.h sys/syscall.h sys/swap.h \
sys/select.h ustat.h sys/ustat.h bits/ustat.h sys/sysinfo.h \
regexp.h bits/select.h bits/mman.h sys/xattr.h
regexp.h bits/select.h bits/mman.h sys/xattr.h bits/syslog.h
routines := brk sbrk sstk ioctl \
readv writev \

3
misc/Versions
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@ -130,4 +130,7 @@ libc {
GLIBC_2.3.3 {
remap_file_pages;
}
GLIBC_2.4 {
__syslog_chk; __vsyslog_chk;
}
}

6
misc/sys/syslog.h
View File

@ -201,6 +201,12 @@ extern void vsyslog (int __pri, __const char *__fmt, __gnuc_va_list __ap)
__attribute__ ((__format__ (__printf__, 2, 0)));
#endif
/* Define some macros helping to catch buffer overflows. */
#if __USE_FORTIFY_LEVEL > 0 && !defined __cplusplus
# include <bits/syslog.h>
#endif
__END_DECLS
#endif /* sys/syslog.h */

39
sysdeps/generic/syslog.c
View File

@ -108,32 +108,28 @@ cancel_handler (void *ptr)
* print message on log file; output is intended for syslogd(8).
*/
void
#if __STDC__
syslog(int pri, const char *fmt, ...)
#else
syslog(pri, fmt, va_alist)
int pri;
char *fmt;
va_dcl
#endif
{
va_list ap;
#if __STDC__
va_start(ap, fmt);
#else
va_start(ap);
#endif
vsyslog(pri, fmt, ap);
__vsyslog_chk(pri, -1, fmt, ap);
va_end(ap);
}
libc_hidden_def (syslog)
void
vsyslog(pri, fmt, ap)
int pri;
register const char *fmt;
__syslog_chk(int pri, int flag, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
__vsyslog_chk(pri, flag, fmt, ap);
va_end(ap);
}
void
__vsyslog_chk(int pri, int flag, const char *fmt, va_list ap)
{
struct tm now_tm;
time_t now;
@ -218,7 +214,10 @@ vsyslog(pri, fmt, 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);
/* Close the memory stream; this will finalize the data
into a malloc'd buffer in BUF. */
@ -315,6 +314,16 @@ vsyslog(pri, fmt, ap)
if (buf != failbuf)
free (buf);
}
libc_hidden_def (__vsyslog_chk)
void
vsyslog(pri, fmt, ap)
int pri;
register const char *fmt;
va_list ap;
{
__vsyslog_chk (pri, -1, fmt, ap);
}
libc_hidden_def (vsyslog)
static struct sockaddr SyslogAddr; /* AF_UNIX address of local logger */