[libvirt] [PATCH v1 28/32] util: pidfile: use VIR_AUTOFREE instead of VIR_FREE for scalar types
Sukrit Bhatnagar
skrtbhtngr at gmail.com
Sat Jul 28 18:01:43 UTC 2018
By making use of GNU C's cleanup attribute handled by the
VIR_AUTOFREE macro for declaring scalar variables, majority
of the VIR_FREE calls can be dropped, which in turn leads to
getting rid of most of our cleanup sections.
Signed-off-by: Sukrit Bhatnagar <skrtbhtngr at gmail.com>
---
src/util/virpidfile.c | 185 ++++++++++++++++----------------------------------
1 file changed, 59 insertions(+), 126 deletions(-)
diff --git a/src/util/virpidfile.c b/src/util/virpidfile.c
index 1a85d43..d82bf92 100644
--- a/src/util/virpidfile.c
+++ b/src/util/virpidfile.c
@@ -97,29 +97,18 @@ int virPidFileWrite(const char *dir,
const char *name,
pid_t pid)
{
- int rc;
- char *pidfile = NULL;
+ VIR_AUTOFREE(char *) pidfile = NULL;
- if (name == NULL || dir == NULL) {
- rc = -EINVAL;
- goto cleanup;
- }
+ if (name == NULL || dir == NULL)
+ return -EINVAL;
- if (virFileMakePath(dir) < 0) {
- rc = -errno;
- goto cleanup;
- }
+ if (virFileMakePath(dir) < 0)
+ return -errno;
- if (!(pidfile = virPidFileBuildPath(dir, name))) {
- rc = -ENOMEM;
- goto cleanup;
- }
+ if (!(pidfile = virPidFileBuildPath(dir, name)))
+ return -ENOMEM;
- rc = virPidFileWritePath(pidfile, pid);
-
- cleanup:
- VIR_FREE(pidfile);
- return rc;
+ return virPidFileWritePath(pidfile, pid);
}
@@ -170,25 +159,16 @@ int virPidFileRead(const char *dir,
const char *name,
pid_t *pid)
{
- int rc;
- char *pidfile = NULL;
+ VIR_AUTOFREE(char *) pidfile = NULL;
*pid = 0;
- if (name == NULL || dir == NULL) {
- rc = -EINVAL;
- goto cleanup;
- }
+ if (name == NULL || dir == NULL)
+ return -EINVAL;
- if (!(pidfile = virPidFileBuildPath(dir, name))) {
- rc = -ENOMEM;
- goto cleanup;
- }
+ if (!(pidfile = virPidFileBuildPath(dir, name)))
+ return -ENOMEM;
- rc = virPidFileReadPath(pidfile, pid);
-
- cleanup:
- VIR_FREE(pidfile);
- return rc;
+ return virPidFileReadPath(pidfile, pid);
}
@@ -219,11 +199,11 @@ int virPidFileReadPathIfAlive(const char *path,
{
int ret;
bool isLink;
- char *procPath = NULL;
- char *procLink = NULL;
+ VIR_AUTOFREE(char *) procPath = NULL;
+ VIR_AUTOFREE(char *) procLink = NULL;
+ VIR_AUTOFREE(char *) resolvedBinPath = NULL;
+ VIR_AUTOFREE(char *) resolvedProcLink = NULL;
size_t procLinkLen;
- char *resolvedBinPath = NULL;
- char *resolvedProcLink = NULL;
const char deletedText[] = " (deleted)";
size_t deletedTextLen = strlen(deletedText);
pid_t retPid;
@@ -232,7 +212,7 @@ int virPidFileReadPathIfAlive(const char *path,
*pid = -1;
if ((ret = virPidFileReadPath(path, &retPid)) < 0)
- goto cleanup;
+ return ret;
#ifndef WIN32
/* Check that it's still alive. Safe to skip this sanity check on
@@ -252,13 +232,12 @@ int virPidFileReadPathIfAlive(const char *path,
goto cleanup;
}
- if (virAsprintf(&procPath, "/proc/%lld/exe", (long long)retPid) < 0) {
- ret = -ENOMEM;
- goto cleanup;
- }
+ if (virAsprintf(&procPath, "/proc/%lld/exe", (long long)retPid) < 0)
+ return -ENOMEM;
if ((ret = virFileIsLink(procPath)) < 0)
- goto cleanup;
+ return ret;
+
isLink = ret;
if (isLink && virFileLinkPointsTo(procPath, binPath)) {
@@ -275,27 +254,21 @@ int virPidFileReadPathIfAlive(const char *path,
* "$procpath (deleted)". Read that link, remove the " (deleted)"
* part, and see if it has the same canonicalized name as binpath.
*/
- if (!(procLink = areadlink(procPath))) {
- ret = -errno;
- goto cleanup;
- }
+ if (!(procLink = areadlink(procPath)))
+ return -errno;
+
procLinkLen = strlen(procLink);
if (procLinkLen > deletedTextLen)
procLink[procLinkLen - deletedTextLen] = 0;
if ((ret = virFileResolveAllLinks(binPath, &resolvedBinPath)) < 0)
- goto cleanup;
+ return ret;
if ((ret = virFileResolveAllLinks(procLink, &resolvedProcLink)) < 0)
- goto cleanup;
+ return ret;
ret = STREQ(resolvedBinPath, resolvedProcLink) ? 0 : -1;
cleanup:
- VIR_FREE(procPath);
- VIR_FREE(procLink);
- VIR_FREE(resolvedProcLink);
- VIR_FREE(resolvedBinPath);
-
/* return the originally set pid of -1 unless we proclaim success */
if (ret == 0)
*pid = retPid;
@@ -326,24 +299,15 @@ int virPidFileReadIfAlive(const char *dir,
pid_t *pid,
const char *binpath)
{
- int rc = 0;
- char *pidfile = NULL;
+ VIR_AUTOFREE(char *) pidfile = NULL;
- if (name == NULL || dir == NULL) {
- rc = -EINVAL;
- goto cleanup;
- }
+ if (name == NULL || dir == NULL)
+ return -EINVAL;
- if (!(pidfile = virPidFileBuildPath(dir, name))) {
- rc = -ENOMEM;
- goto cleanup;
- }
+ if (!(pidfile = virPidFileBuildPath(dir, name)))
+ return -ENOMEM;
- rc = virPidFileReadPathIfAlive(pidfile, pid, binpath);
-
- cleanup:
- VIR_FREE(pidfile);
- return rc;
+ return virPidFileReadPathIfAlive(pidfile, pid, binpath);
}
@@ -361,24 +325,15 @@ int virPidFileDeletePath(const char *pidfile)
int virPidFileDelete(const char *dir,
const char *name)
{
- int rc = 0;
- char *pidfile = NULL;
+ VIR_AUTOFREE(char *) pidfile = NULL;
- if (name == NULL || dir == NULL) {
- rc = -EINVAL;
- goto cleanup;
- }
+ if (name == NULL || dir == NULL)
+ return -EINVAL;
- if (!(pidfile = virPidFileBuildPath(dir, name))) {
- rc = -ENOMEM;
- goto cleanup;
- }
+ if (!(pidfile = virPidFileBuildPath(dir, name)))
+ return -ENOMEM;
- rc = virPidFileDeletePath(pidfile);
-
- cleanup:
- VIR_FREE(pidfile);
- return rc;
+ return virPidFileDeletePath(pidfile);
}
int virPidFileAcquirePath(const char *path,
@@ -470,24 +425,15 @@ int virPidFileAcquire(const char *dir,
bool waitForLock,
pid_t pid)
{
- int rc = 0;
- char *pidfile = NULL;
+ VIR_AUTOFREE(char *) pidfile = NULL;
- if (name == NULL || dir == NULL) {
- rc = -EINVAL;
- goto cleanup;
- }
+ if (name == NULL || dir == NULL)
+ return -EINVAL;
- if (!(pidfile = virPidFileBuildPath(dir, name))) {
- rc = -ENOMEM;
- goto cleanup;
- }
+ if (!(pidfile = virPidFileBuildPath(dir, name)))
+ return -ENOMEM;
- rc = virPidFileAcquirePath(pidfile, waitForLock, pid);
-
- cleanup:
- VIR_FREE(pidfile);
- return rc;
+ return virPidFileAcquirePath(pidfile, waitForLock, pid);
}
@@ -518,24 +464,15 @@ int virPidFileRelease(const char *dir,
const char *name,
int fd)
{
- int rc = 0;
- char *pidfile = NULL;
+ VIR_AUTOFREE(char *) pidfile = NULL;
- if (name == NULL || dir == NULL) {
- rc = -EINVAL;
- goto cleanup;
- }
+ if (name == NULL || dir == NULL)
+ return -EINVAL;
- if (!(pidfile = virPidFileBuildPath(dir, name))) {
- rc = -ENOMEM;
- goto cleanup;
- }
+ if (!(pidfile = virPidFileBuildPath(dir, name)))
+ return -ENOMEM;
- rc = virPidFileReleasePath(pidfile, fd);
-
- cleanup:
- VIR_FREE(pidfile);
- return rc;
+ return virPidFileReleasePath(pidfile, fd);
}
@@ -545,8 +482,7 @@ virPidFileConstructPath(bool privileged,
const char *progname,
char **pidfile)
{
- int ret = -1;
- char *rundir = NULL;
+ VIR_AUTOFREE(char *) rundir = NULL;
if (privileged) {
/*
@@ -556,29 +492,26 @@ virPidFileConstructPath(bool privileged,
if (!statedir) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("No statedir specified"));
- goto cleanup;
+ return -1;
}
if (virAsprintf(pidfile, "%s/run/%s.pid", statedir, progname) < 0)
- goto cleanup;
+ return -1;
} else {
if (!(rundir = virGetUserRuntimeDirectory()))
- goto cleanup;
+ return -1;
if (virFileMakePathWithMode(rundir, 0700) < 0) {
virReportSystemError(errno,
_("Cannot create user runtime directory '%s'"),
rundir);
- goto cleanup;
+ return -1;
}
if (virAsprintf(pidfile, "%s/%s.pid", rundir, progname) < 0)
- goto cleanup;
+ return -1;
}
- ret = 0;
- cleanup:
- VIR_FREE(rundir);
- return ret;
+ return 0;
}
--
1.8.3.1
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