summaryrefslogtreecommitdiffstats
path: root/0003-Fix-8051-use-old-way-as-fallback-to-save-configurati.patch
diff options
context:
space:
mode:
Diffstat (limited to '0003-Fix-8051-use-old-way-as-fallback-to-save-configurati.patch')
-rw-r--r--0003-Fix-8051-use-old-way-as-fallback-to-save-configurati.patch96
1 files changed, 0 insertions, 96 deletions
diff --git a/0003-Fix-8051-use-old-way-as-fallback-to-save-configurati.patch b/0003-Fix-8051-use-old-way-as-fallback-to-save-configurati.patch
deleted file mode 100644
index ddc2066..0000000
--- a/0003-Fix-8051-use-old-way-as-fallback-to-save-configurati.patch
+++ /dev/null
@@ -1,96 +0,0 @@
-From bd2302cb5ff137e03b056c9643991bd7ce7f0f5e Mon Sep 17 00:00:00 2001
-From: Remi Collet <remi@remirepo.net>
-Date: Mon, 16 Nov 2020 11:04:10 +0100
-Subject: [PATCH] Fix #8051 use old way as fallback to save configuration file
- in non writable dir
-
----
- src/config.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++
- 1 file changed, 65 insertions(+)
-
-diff --git a/src/config.c b/src/config.c
-index 07ed91e5f..c93407265 100644
---- a/src/config.c
-+++ b/src/config.c
-@@ -1580,6 +1580,67 @@ void rewriteConfigRemoveOrphaned(struct rewriteConfigState *state) {
- dictReleaseIterator(di);
- }
-
-+/* This function overwrites the old configuration file with the new content.
-+ *
-+ * 1) The old file length is obtained.
-+ * 2) If the new content is smaller, padding is added.
-+ * 3) A single write(2) call is used to replace the content of the file.
-+ * 4) Later the file is truncated to the length of the new content.
-+ *
-+ * This way we are sure the file is left in a consistent state even if the
-+ * process is stopped between any of the four operations.
-+ *
-+ * This fallback method is called when atomic fails because of missing
-+ * write permission in the configuration directory (e.g. /etc)
-+ *
-+ * The function returns 0 on success, otherwise -1 is returned and errno
-+ * set accordingly. */
-+int rewriteConfigOverwriteFileFallback(char *configfile, sds content) {
-+ int retval = 0;
-+ int fd = open(configfile,O_RDWR|O_CREAT,0644);
-+ int content_size = sdslen(content), padding = 0;
-+ struct stat sb;
-+ sds content_padded;
-+
-+ /* 1) Open the old file (or create a new one if it does not
-+ * exist), get the size. */
-+ if (fd == -1) return -1; /* errno set by open(). */
-+ if (fstat(fd,&sb) == -1) {
-+ close(fd);
-+ return -1; /* errno set by fstat(). */
-+ }
-+
-+ /* 2) Pad the content at least match the old file size. */
-+ content_padded = sdsdup(content);
-+ if (content_size < sb.st_size) {
-+ /* If the old file was bigger, pad the content with
-+ * a newline plus as many "#" chars as required. */
-+ padding = sb.st_size - content_size;
-+ content_padded = sdsgrowzero(content_padded,sb.st_size);
-+ content_padded[content_size] = '\n';
-+ memset(content_padded+content_size+1,'#',padding-1);
-+ }
-+
-+ /* 3) Write the new content using a single write(2). */
-+ if (write(fd,content_padded,strlen(content_padded)) == -1) {
-+ retval = -1;
-+ goto cleanup;
-+ }
-+
-+ /* 4) Truncate the file to the right length if we used padding. */
-+ if (padding) {
-+ if (ftruncate(fd,content_size) == -1) {
-+ /* Non critical error... */
-+ }
-+ }
-+ serverLog(LL_DEBUG, "Rewritten config file (%s) successfully", configfile);
-+
-+cleanup:
-+ sdsfree(content_padded);
-+ close(fd);
-+ return retval;
-+}
-+
- /* This function replaces the old configuration file with the new content
- * in an atomic manner.
- *
-@@ -1608,6 +1669,10 @@ int rewriteConfigOverwriteFile(char *configfile, sds content) {
- #endif
-
- if (fd == -1) {
-+ if (errno == EACCES) {
-+ serverLog(LL_DEBUG, "Could not create tmp config file (%s), try fallback", strerror(errno));
-+ return rewriteConfigOverwriteFileFallback(configfile, content);
-+ }
- serverLog(LL_WARNING, "Could not create tmp config file (%s)", strerror(errno));
- return retval;
- }
---
-2.25.4
-