5:45 a.m.
This neutral code refactoring just moves the place where we preserve
errno out one layer, but should have no other effect.
---
server/internal.h | 8 ++++----
server/log-stderr.c | 9 ++-------
server/log-syslog.c | 13 ++++---------
server/log.c | 12 ++++++++----
4 files changed, 18 insertions(+), 24 deletions(-)
diff --git a/server/internal.h b/server/internal.h
index 0b0507e446..1a783e3fc0 100644
--- a/server/internal.h
+++ b/server/internal.h
@@ -340,10 +340,10 @@ extern void free_debug_flags (void);
extern void log_verror (const char *fs, va_list args);
/* log-*.c */
-extern void log_stderr_verror (const char *fs, va_list args)
- ATTRIBUTE_FORMAT_PRINTF (1, 0);
-extern void log_syslog_verror (const char *fs, va_list args)
- ATTRIBUTE_FORMAT_PRINTF (1, 0);
+extern void log_stderr_verror (int orig_errno, const char *fs, va_list args)
+ ATTRIBUTE_FORMAT_PRINTF (2, 0);
+extern void log_syslog_verror (int orig_errno, const char *fs, va_list args)
+ ATTRIBUTE_FORMAT_PRINTF (2, 0);
/* vfprintf.c */
#if !HAVE_VFPRINTF_PERCENT_M
diff --git a/server/log-stderr.c b/server/log-stderr.c
index 8a55f5df22..4d8b09da37 100644
--- a/server/log-stderr.c
+++ b/server/log-stderr.c
@@ -43,12 +43,9 @@
#include "internal.h"
-/* Note: preserves the previous value of errno. */
void
-log_stderr_verror (const char *fs, va_list args)
+log_stderr_verror (int orig_errno, const char *fs, va_list args)
{
- int err = errno; /* must be first line of function */
-
const char *name = threadlocal_get_name ();
size_t instance_num = threadlocal_get_instance_num ();
int tty;
@@ -69,7 +66,7 @@ log_stderr_verror (const char *fs, va_list args)
}
fprintf (stderr, "error: ");
- errno = err; /* must restore in case fs contains %m */
+ errno = orig_errno; /* must restore in case fs contains %m */
vfprintf (stderr, fs, args);
fprintf (stderr, "\n");
@@ -78,6 +75,4 @@ log_stderr_verror (const char *fs, va_list args)
#ifdef HAVE_FUNLOCKFILE
funlockfile (stderr);
#endif
-
- errno = err; /* must be last line of function */
}
diff --git a/server/log-syslog.c b/server/log-syslog.c
index 76c5035b7d..29a7a8252f 100644
--- a/server/log-syslog.c
+++ b/server/log-syslog.c
@@ -45,11 +45,9 @@
/* Tempted to use LOG_FTP instead of LOG_DAEMON! */
static const int PRIORITY = LOG_DAEMON|LOG_ERR;
-/* Note: preserves the previous value of errno. */
void
-log_syslog_verror (const char *fs, va_list args)
+log_syslog_verror (int orig_errno, const char *fs, va_list args)
{
- int err = errno;
const char *name = threadlocal_get_name ();
size_t instance_num = threadlocal_get_instance_num ();
CLEANUP_FREE char *msg = NULL;
@@ -59,9 +57,9 @@ log_syslog_verror (const char *fs, va_list args)
fp = open_memstream (&msg, &len);
if (fp == NULL) {
/* Fallback to logging using fs, args directly. */
- errno = err; /* Must restore in case fs contains %m */
+ errno = orig_errno; /* must restore in case fs contains %m */
vsyslog (PRIORITY, fs, args);
- goto out;
+ return;
}
if (name) {
@@ -71,12 +69,9 @@ log_syslog_verror (const char *fs, va_list args)
fprintf (fp, ": ");
}
- errno = err; /* Must restore in case fs contains %m */
+ errno = orig_errno; /* must restore in case fs contains %m */
vfprintf (fp, fs, args);
close_memstream (fp);
syslog (PRIORITY, "%s", msg);
-
- out:
- errno = err;
}
diff --git a/server/log.c b/server/log.c
index 464e4f9a72..9c1f667a9b 100644
--- a/server/log.c
+++ b/server/log.c
@@ -46,23 +46,27 @@
void
log_verror (const char *fs, va_list args)
{
+ int orig_errno = errno;
+
switch (log_to) {
case LOG_TO_DEFAULT:
if (forked_into_background)
- log_syslog_verror (fs, args);
+ log_syslog_verror (orig_errno, fs, args);
else
- log_stderr_verror (fs, args);
+ log_stderr_verror (orig_errno, fs, args);
break;
case LOG_TO_SYSLOG:
- log_syslog_verror (fs, args);
+ log_syslog_verror (orig_errno, fs, args);
break;
case LOG_TO_STDERR:
- log_stderr_verror (fs, args);
+ log_stderr_verror (orig_errno, fs, args);
break;
case LOG_TO_NULL:
/* nothing */
break;
}
+
+ errno = orig_errno; /* Restore errno before leaving the function. */
}
/* Note: preserves the previous value of errno. */
--
2.44.0