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authorUlrich Drepper <drepper@redhat.com>2000-06-14 07:14:09 +0000
committerUlrich Drepper <drepper@redhat.com>2000-06-14 07:14:09 +0000
commit594cee6c498dc6124e0ba1926d54ffd1fd5bffd8 (patch)
tree98224e9be0d476798f905126fda8155ed475d93b /misc/syslog.c
parent38161ac76efe4c50f13e244903a44645023fec83 (diff)
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Update.
2000-06-14 Ulrich Drepper <drepper@redhat.com> * misc/syslog.c (vsyslog): Allow open_memstream to fail without crashing the application. Emit some simple error message. Reported by mju@panasas.com [PR libc/1769].
Diffstat (limited to 'misc/syslog.c')
-rw-r--r--misc/syslog.c82
1 files changed, 54 insertions, 28 deletions
diff --git a/misc/syslog.c b/misc/syslog.c
index 29cd266..c44f941 100644
--- a/misc/syslog.c
+++ b/misc/syslog.c
@@ -120,6 +120,7 @@ vsyslog(pri, fmt, ap)
struct sigaction *oldaction_ptr = NULL;
int sigpipe;
int saved_errno = errno;
+ char failbuf[3 * sizeof (pid_t) + sizeof "out of memory []"];
#define INTERNALLOG LOG_ERR|LOG_CONS|LOG_PERROR|LOG_PID
/* Check for invalid bits. */
@@ -139,36 +140,61 @@ vsyslog(pri, fmt, ap)
/* Build the message in a memory-buffer stream. */
f = open_memstream (&buf, &bufsize);
- prioff = fprintf (f, "<%d>", pri);
- (void) time (&now);
+ if (f == NULL)
+ {
+ /* We cannot get a stream. There is not much we can do but
+ emitting an error messages. */
+ char numbuf[3 * sizeof (pid_t)];
+ char *nump;
+ char *endp = __stpcpy (failbuf, "out of memory [");
+ pid_t pid = __getpid ();
+
+ nump = numbuf + sizeof (numbuf);
+ /* The PID can never be zero. */
+ do
+ *--nump = '0' + pid % 10;
+ while ((pid /= 10) != 0);
+
+ endp = __mempcpy (endp, nump, (nump + sizeof (numbuf)) - nump);
+ *endp++ = ']';
+ *endp = '\0';
+ buf = failbuf;
+ bufsize = endp - failbuf;
+ }
+ else
+ {
+ prioff = fprintf (f, "<%d>", pri);
+ (void) time (&now);
#ifdef USE_IN_LIBIO
- f->_IO_write_ptr += strftime (f->_IO_write_ptr,
- f->_IO_write_end - f->_IO_write_ptr,
- "%h %e %T ",
- __localtime_r (&now, &now_tm));
+ f->_IO_write_ptr += strftime (f->_IO_write_ptr,
+ f->_IO_write_end - f->_IO_write_ptr,
+ "%h %e %T ",
+ __localtime_r (&now, &now_tm));
#else
- f->__bufp += strftime (f->__bufp, f->__put_limit - f->__bufp,
- "%h %e %T ", __localtime_r (&now, &now_tm));
+ f->__bufp += strftime (f->__bufp, f->__put_limit - f->__bufp,
+ "%h %e %T ", __localtime_r (&now, &now_tm));
#endif
- msgoff = ftell (f);
- if (LogTag == NULL)
- LogTag = __progname;
- if (LogTag != NULL)
- fputs_unlocked (LogTag, f);
- if (LogStat & LOG_PID)
- fprintf (f, "[%d]", __getpid ());
- if (LogTag != NULL)
- putc_unlocked (':', f), putc_unlocked (' ', f);
-
- /* Restore errno for %m format. */
- __set_errno (saved_errno);
-
- /* We have the header. Print the user's format into the buffer. */
- vfprintf (f, fmt, ap);
-
- /* Close the memory stream; this will finalize the data
- into a malloc'd buffer in BUF. */
- fclose (f);
+ msgoff = ftell (f);
+ if (LogTag == NULL)
+ LogTag = __progname;
+ if (LogTag != NULL)
+ fputs_unlocked (LogTag, f);
+ if (LogStat & LOG_PID)
+ fprintf (f, "[%d]", __getpid ());
+ if (LogTag != NULL)
+ putc_unlocked (':', f), putc_unlocked (' ', f);
+
+ /* Restore errno for %m format. */
+ __set_errno (saved_errno);
+
+ /* We have the header. Print the user's format into the
+ buffer. */
+ vfprintf (f, fmt, ap);
+
+ /* Close the memory stream; this will finalize the data
+ into a malloc'd buffer in BUF. */
+ fclose (f);
+ }
/* Output to stderr if requested. */
if (LogStat & LOG_PERROR) {
@@ -326,7 +352,7 @@ closelog ()
closelog_internal ();
LogTag = NULL;
LogType = SOCK_DGRAM; /* this is the default */
-
+
/* Free the lock. */
__libc_cleanup_region_end (1);
}