[libvirt] [PATCH] build: use re-entrant functions in virsh
Eric Blake
eblake at redhat.com
Tue Sep 4 23:36:34 UTC 2012
Today's patches pointed out that virsh was still using localtime(),
which is not thread-safe, even though virsh is definitely
multi-threaded.
* cfg.mk (exclude_file_name_regexp--sc_prohibit_nonreentrant):
Tighten the rule.
* tools/virsh.c (vshOutputLogFile): Avoid localtime.
(vshEditWriteToTempFile, vshEditReadBackFile, cmdCd, cmdPwd)
(vshCloseLogFile): Avoid strerror.
* tools/console.c (vshMakeStdinRaw): Likewise.
* tools/virsh-domain.c (vshGenFileName): Fix spacing in previous
patch.
---
cfg.mk | 2 +-
tools/console.c | 11 +++++++----
tools/virsh-domain.c | 2 +-
tools/virsh.c | 40 ++++++++++++++++++++++++----------------
4 files changed, 33 insertions(+), 22 deletions(-)
diff --git a/cfg.mk b/cfg.mk
index 4cdfd1b..245e0f2 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -780,7 +780,7 @@ exclude_file_name_regexp--sc_prohibit_newline_at_end_of_diagnostic = \
^src/rpc/gendispatch\.pl$$
exclude_file_name_regexp--sc_prohibit_nonreentrant = \
- ^((po|tests)/|docs/.*py$$|tools/(virsh|console)\.c$$)
+ ^((po|tests)/|docs/.*py$$)
exclude_file_name_regexp--sc_prohibit_raw_allocation = \
^(src/util/memory\.[ch]|examples/.*)$$
diff --git a/tools/console.c b/tools/console.c
index fee2ce3..4394e48 100644
--- a/tools/console.c
+++ b/tools/console.c
@@ -1,7 +1,7 @@
/*
* console.c: A dumb serial console client
*
- * Copyright (C) 2007-2008, 2010-2011 Red Hat, Inc.
+ * Copyright (C) 2007-2008, 2010-2012 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@@ -299,13 +299,16 @@ vshGetEscapeChar(const char *s)
return *s;
}
-int vshMakeStdinRaw(struct termios *ttyattr, bool report_errors) {
+int
+vshMakeStdinRaw(struct termios *ttyattr, bool report_errors)
+{
struct termios rawattr;
+ char ebuf[1024];
if (tcgetattr(STDIN_FILENO, ttyattr) < 0) {
if (report_errors)
VIR_ERROR(_("unable to get tty attributes: %s"),
- strerror(errno));
+ virStrerror(errno, ebuf, sizeof(ebuf)));
return -1;
}
@@ -315,7 +318,7 @@ int vshMakeStdinRaw(struct termios *ttyattr, bool report_errors) {
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &rawattr) < 0) {
if (report_errors)
VIR_ERROR(_("unable to set tty attributes: %s"),
- strerror(errno));
+ virStrerror(errno, ebuf, sizeof(ebuf)));
return -1;
}
diff --git a/tools/virsh-domain.c b/tools/virsh-domain.c
index 3cef782..727c39b 100644
--- a/tools/virsh-domain.c
+++ b/tools/virsh-domain.c
@@ -3723,7 +3723,7 @@ vshGenFileName(vshControl *ctl, virDomainPtr dom, const char *mime)
ext = ".png";
/* add mime type here */
- time (&cur_time);
+ time(&cur_time);
localtime_r(&cur_time, &time_info);
strftime(timestr, sizeof(timestr), "%Y-%m-%d-%H:%M:%S", &time_info);
diff --git a/tools/virsh.c b/tools/virsh.c
index 88da429..e3f9e4e 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -511,6 +511,7 @@ vshEditWriteToTempFile(vshControl *ctl, const char *doc)
char *ret;
const char *tmpdir;
int fd;
+ char ebuf[1024];
tmpdir = getenv ("TMPDIR");
if (!tmpdir) tmpdir = "/tmp";
@@ -521,14 +522,14 @@ vshEditWriteToTempFile(vshControl *ctl, const char *doc)
fd = mkstemps(ret, 4);
if (fd == -1) {
vshError(ctl, _("mkstemps: failed to create temporary file: %s"),
- strerror(errno));
+ virStrerror(errno, ebuf, sizeof(ebuf)));
VIR_FREE(ret);
return NULL;
}
if (safewrite(fd, doc, strlen(doc)) == -1) {
vshError(ctl, _("write: %s: failed to write to temporary file: %s"),
- ret, strerror(errno));
+ ret, virStrerror(errno, ebuf, sizeof(ebuf)));
VIR_FORCE_CLOSE(fd);
unlink(ret);
VIR_FREE(ret);
@@ -536,7 +537,7 @@ vshEditWriteToTempFile(vshControl *ctl, const char *doc)
}
if (VIR_CLOSE(fd) < 0) {
vshError(ctl, _("close: %s: failed to write or close temporary file: %s"),
- ret, strerror(errno));
+ ret, virStrerror(errno, ebuf, sizeof(ebuf)));
unlink(ret);
VIR_FREE(ret);
return NULL;
@@ -606,11 +607,12 @@ char *
vshEditReadBackFile(vshControl *ctl, const char *filename)
{
char *ret;
+ char ebuf[1024];
if (virFileReadAll(filename, VSH_MAX_XML_FILE, &ret) == -1) {
vshError(ctl,
_("%s: failed to read temporary file: %s"),
- filename, strerror(errno));
+ filename, virStrerror(errno, ebuf, sizeof(ebuf)));
return NULL;
}
return ret;
@@ -637,6 +639,7 @@ cmdCd(vshControl *ctl, const vshCmd *cmd)
const char *dir = NULL;
char *dir_malloced = NULL;
bool ret = true;
+ char ebuf[1024];
if (!ctl->imode) {
vshError(ctl, "%s", _("cd: command valid only in interactive mode"));
@@ -650,7 +653,8 @@ cmdCd(vshControl *ctl, const vshCmd *cmd)
dir = "/";
if (chdir(dir) == -1) {
- vshError(ctl, _("cd: %s: %s"), strerror(errno), dir);
+ vshError(ctl, _("cd: %s: %s"),
+ virStrerror(errno, ebuf, sizeof(ebuf)), dir);
ret = false;
}
@@ -672,11 +676,12 @@ cmdPwd(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
{
char *cwd;
bool ret = true;
+ char ebuf[1024];
cwd = getcwd(NULL, 0);
if (!cwd) {
vshError(ctl, _("pwd: cannot get current directory: %s"),
- strerror(errno));
+ virStrerror(errno, ebuf, sizeof(ebuf)));
ret = false;
} else {
vshPrint(ctl, _("%s\n"), cwd);
@@ -2188,7 +2193,7 @@ vshOutputLogFile(vshControl *ctl, int log_level, const char *msg_format,
size_t len;
const char *lvl = "";
time_t stTime;
- struct tm *stTm;
+ struct tm stTm;
if (ctl->log_fd == -1)
return;
@@ -2198,15 +2203,15 @@ vshOutputLogFile(vshControl *ctl, int log_level, const char *msg_format,
*
* [YYYY.MM.DD HH:MM:SS SIGNATURE PID] LOG_LEVEL message
*/
- time (&stTime);
- stTm = localtime(&stTime);
+ time(&stTime);
+ localtime_r(&stTime, &stTm);
virBufferAsprintf(&buf, "[%d.%02d.%02d %02d:%02d:%02d %s %d] ",
- (1900 + stTm->tm_year),
- (1 + stTm->tm_mon),
- stTm->tm_mday,
- stTm->tm_hour,
- stTm->tm_min,
- stTm->tm_sec,
+ (1900 + stTm.tm_year),
+ (1 + stTm.tm_mon),
+ stTm.tm_mday,
+ stTm.tm_hour,
+ stTm.tm_min,
+ stTm.tm_sec,
SIGN_NAME,
(int) getpid());
switch (log_level) {
@@ -2264,10 +2269,13 @@ error:
void
vshCloseLogFile(vshControl *ctl)
{
+ char ebuf[1024];
+
/* log file close */
if (VIR_CLOSE(ctl->log_fd) < 0) {
vshError(ctl, _("%s: failed to write log file: %s"),
- ctl->logfile ? ctl->logfile : "?", strerror (errno));
+ ctl->logfile ? ctl->logfile : "?",
+ virStrerror(errno, ebuf, sizeof(ebuf)));
}
if (ctl->logfile) {
--
1.7.11.4
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