postgres.git / summary / log / commit / refs

commit    4fda03b671a6849972d0a66b4af5518cd2a97a70
Author:   Daniel Gustafsson <dgustafsson@postgresql.org>
Date:     Tue Oct 19 10:59:54 2021 +0000
First released in: 15.0, 9.6.24, 10.19, 11.14, 12.9, 13.5, 14.1

    Fix bug in TOC file error message printing
    
    If the blob TOC file cannot be parsed, the error message was failing
    to print the filename as the variable holding it was shadowed by the
    destination buffer for parsing.  When the filename fails to parse,
    the error will print an empty string:
    
     ./pg_restore -d foo -F d dump
     pg_restore: error: invalid line in large object TOC file "": ..
    
    ..instead of the intended error message:
    
     ./pg_restore -d foo -F d dump
     pg_restore: error: invalid line in large object TOC file "dump/blobs.toc": ..
    
    Fix by renaming both variables as the shared name was too generic to
    store either and still convey what the variable held.
    
    Backpatch all the way down to 9.6.
    
    Reviewed-by: Tom Lane
    Discussion: https://postgr.es/m/A2B151F5-B32B-4F2C-BA4A-6870856D9BDE@yesql.se
    Backpatch-through: 9.6


 src/bin/pg_dump/pg_backup_directory.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/bin/pg_dump/pg_backup_directory.c b/src/bin/pg_dump/pg_backup_directory.c
index 27615bfa9b6..262377186b6 100644
--- a/src/bin/pg_dump/pg_backup_directory.c
+++ b/src/bin/pg_dump/pg_backup_directory.c
@@ -442,42 +442,42 @@ _LoadBlobs(ArchiveHandle *AH)
 {
 	Oid			oid;
 	lclContext *ctx = (lclContext *) AH->formatData;
-	char		fname[MAXPGPATH];
+	char		tocfname[MAXPGPATH];
 	char		line[MAXPGPATH];
 
 	StartRestoreBlobs(AH);
 
-	setFilePath(AH, fname, "blobs.toc");
+	setFilePath(AH, tocfname, "blobs.toc");
 
-	ctx->blobsTocFH = cfopen_read(fname, PG_BINARY_R);
+	ctx->blobsTocFH = cfopen_read(tocfname, PG_BINARY_R);
 
 	if (ctx->blobsTocFH == NULL)
 		exit_horribly(modulename, "could not open large object TOC file \"%s\" for input: %s\n",
-					  fname, strerror(errno));
+					  tocfname, strerror(errno));
 
 	/* Read the blobs TOC file line-by-line, and process each blob */
 	while ((cfgets(ctx->blobsTocFH, line, MAXPGPATH)) != NULL)
 	{
-		char		fname[MAXPGPATH + 1];
+		char		blobfname[MAXPGPATH + 1];
 		char		path[MAXPGPATH];
 
-		/* Can't overflow because line and fname are the same length. */
-		if (sscanf(line, "%u %" CppAsString2(MAXPGPATH) "s\n", &oid, fname) != 2)
+		/* Can't overflow because line and blobfname are the same length. */
+		if (sscanf(line, "%u %" CppAsString2(MAXPGPATH) "s\n", &oid, blobfname) != 2)
 			exit_horribly(modulename, "invalid line in large object TOC file \"%s\": \"%s\"\n",
-						  fname, line);
+						  tocfname, line);
 
 		StartRestoreBlob(AH, oid, AH->public.ropt->dropSchema);
-		snprintf(path, MAXPGPATH, "%s/%s", ctx->directory, fname);
+		snprintf(path, MAXPGPATH, "%s/%s", ctx->directory, blobfname);
 		_PrintFileData(AH, path);
 		EndRestoreBlob(AH, oid);
 	}
 	if (!cfeof(ctx->blobsTocFH))
 		exit_horribly(modulename, "error reading large object TOC file \"%s\"\n",
-					  fname);
+					  tocfname);
 
 	if (cfclose(ctx->blobsTocFH) != 0)
 		exit_horribly(modulename, "could not close large object TOC file \"%s\": %s\n",
-					  fname, strerror(errno));
+					  tocfname, strerror(errno));
 
 	ctx->blobsTocFH = NULL;
 


[parent: abdf81a20ba2]