3:59 a.m.
There are couple of places where we have a string and want to
save it to a file. Atomically. In all those places we use
virFileRewrite() but also implement the very same callback which
takes the string and write it into temp file. This makes no
sense. Unify the callbacks and move them to one place.
Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com>
---
src/conf/virsecretobj.c | 20 ++------------------
src/libvirt_private.syms | 1 +
src/network/leaseshelper.c | 14 +-------------
src/util/virfile.c | 24 +++++++++++++++++++++++-
src/util/virfile.h | 7 +++++--
src/util/virxml.c | 4 ++--
6 files changed, 34 insertions(+), 36 deletions(-)
diff --git a/src/conf/virsecretobj.c b/src/conf/virsecretobj.c
index 2bdfe08..1351f18 100644
--- a/src/conf/virsecretobj.c
+++ b/src/conf/virsecretobj.c
@@ -692,20 +692,6 @@ virSecretObjDeleteData(virSecretObjPtr secret)
has virSecretDef stored as XML in "$basename.xml". If a value of the
secret is defined, it is stored as base64 (with no formatting) in
"$basename.base64". "$basename" is in both cases the
base64-encoded UUID. */
-
-static int
-virSecretRewriteFile(int fd,
- void *opaque)
-{
- char *data = opaque;
-
- if (safewrite(fd, data, strlen(data)) < 0)
- return -1;
-
- return 0;
-}
-
-
int
virSecretObjSaveConfig(virSecretObjPtr secret)
{
@@ -715,8 +701,7 @@ virSecretObjSaveConfig(virSecretObjPtr secret)
if (!(xml = virSecretDefFormat(secret->def)))
goto cleanup;
- if (virFileRewrite(secret->configFile, S_IRUSR | S_IWUSR,
- virSecretRewriteFile, xml) < 0)
+ if (virFileRewriteStr(secret->configFile, S_IRUSR | S_IWUSR, xml) < 0)
goto cleanup;
ret = 0;
@@ -739,8 +724,7 @@ virSecretObjSaveData(virSecretObjPtr secret)
if (!(base64 = virStringEncodeBase64(secret->value, secret->value_size)))
goto cleanup;
- if (virFileRewrite(secret->base64File, S_IRUSR | S_IWUSR,
- virSecretRewriteFile, base64) < 0)
+ if (virFileRewriteStr(secret->base64File, S_IRUSR | S_IWUSR, base64) < 0)
goto cleanup;
ret = 0;
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index b1f42f2..0641030 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1600,6 +1600,7 @@ virFileRemoveLastComponent;
virFileResolveAllLinks;
virFileResolveLink;
virFileRewrite;
+virFileRewriteStr;
virFileSanitizePath;
virFileSkipRoot;
virFileStripSuffix;
diff --git a/src/network/leaseshelper.c b/src/network/leaseshelper.c
index 16f6eb8..a0262dd 100644
--- a/src/network/leaseshelper.c
+++ b/src/network/leaseshelper.c
@@ -64,17 +64,6 @@ usage(int status)
exit(status);
}
-static int
-customLeaseRewriteFile(int fd, void *opaque)
-{
- char **data = opaque;
-
- if (safewrite(fd, *data, strlen(*data)) < 0)
- return -1;
-
- return 0;
-}
-
/* Flags denoting actions for a lease */
enum virLeaseActionFlags {
VIR_LEASE_ACTION_ADD, /* Create new lease */
@@ -252,8 +241,7 @@ main(int argc, char **argv)
}
/* Write to file */
- if (virFileRewrite(custom_lease_file, 0644,
- customLeaseRewriteFile, &leases_str) < 0)
+ if (virFileRewriteStr(custom_lease_file, 0644, leases_str) < 0)
goto cleanup;
break;
diff --git a/src/util/virfile.c b/src/util/virfile.c
index 1fb89ce..c9ecb8a 100644
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -443,7 +443,7 @@ int
virFileRewrite(const char *path,
mode_t mode,
virFileRewriteFunc rewrite,
- void *opaque)
+ const void *opaque)
{
char *newfile = NULL;
int fd = -1;
@@ -494,6 +494,28 @@ virFileRewrite(const char *path,
}
+static int
+virFileRewriteStrHelper(int fd, const void *opaque)
+{
+ const char *data = opaque;
+
+ if (safewrite(fd, data, strlen(data)) < 0)
+ return -1;
+
+ return 0;
+}
+
+
+int
+virFileRewriteStr(const char *path,
+ mode_t mode,
+ const char *str)
+{
+ return virFileRewrite(path, mode,
+ virFileRewriteStrHelper, str);
+}
+
+
int virFileTouch(const char *path, mode_t mode)
{
int fd = -1;
diff --git a/src/util/virfile.h b/src/util/virfile.h
index b4ae6ea..060067d 100644
--- a/src/util/virfile.h
+++ b/src/util/virfile.h
@@ -101,11 +101,14 @@ void virFileWrapperFdFree(virFileWrapperFdPtr dfd);
int virFileLock(int fd, bool shared, off_t start, off_t len, bool waitForLock);
int virFileUnlock(int fd, off_t start, off_t len);
-typedef int (*virFileRewriteFunc)(int fd, void *opaque);
+typedef int (*virFileRewriteFunc)(int fd, const void *opaque);
int virFileRewrite(const char *path,
mode_t mode,
virFileRewriteFunc rewrite,
- void *opaque);
+ const void *opaque);
+int virFileRewriteStr(const char *path,
+ mode_t mode,
+ const char *str);
int virFileTouch(const char *path, mode_t mode);
diff --git a/src/util/virxml.c b/src/util/virxml.c
index 96c17fa..6660248 100644
--- a/src/util/virxml.c
+++ b/src/util/virxml.c
@@ -871,9 +871,9 @@ struct virXMLRewriteFileData {
};
static int
-virXMLRewriteFile(int fd, void *opaque)
+virXMLRewriteFile(int fd, const void *opaque)
{
- struct virXMLRewriteFileData *data = opaque;
+ const struct virXMLRewriteFileData *data = opaque;
if (data->warnCommand) {
if (virXMLEmitWarning(fd, data->warnName, data->warnCommand) < 0)
--
2.8.4