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Be sure to close() file descriptor on error case

In receivelog.c:writeTimeLineHistoryFile(), we were not properlyclosing the open'd file descriptor in error cases. While thiswouldn't matter much if we were about to exit due to such anerror, that's not the case with pg_receivexlog as it can be along-running process and these errors are non-fatal.This resource leak was found by the Coverity scanner.Back-patch to 9.3 where this issue first appeared.

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src/bin/pg_basebackup
- receivelog.c

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`‎src/bin/pg_basebackup/receivelog.c‎`

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Original file line number	Diff line number	Diff line change
`@@ -329,6 +329,7 @@ writeTimeLineHistoryFile(char basedir, TimeLineID tli, char filename, char *co`
`329`	`329`	`/*`
`330`	`330`	`* If we fail to make the file, delete it to release disk space`
`331`	`331`	`*/`
	`332`	`+close(fd);`
`332`	`333`	`unlink(tmppath);`
`333`	`334`	`errno=save_errno;`
`334`	`335`
`@@ -339,6 +340,7 @@ writeTimeLineHistoryFile(char basedir, TimeLineID tli, char filename, char *co`
`339`	`340`
`340`	`341`	`if (fsync(fd)!=0)`
`341`	`342`	`{`
	`343`	`+close(fd);`
`342`	`344`	`fprintf(stderr,_("%s: could not fsync file \"%s\": %s\n"),`
`343`	`345`	`progname,tmppath,strerror(errno));`
`344`	`346`	`return false;`

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Commitcec62ef

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`‎src/bin/pg_basebackup/receivelog.c‎`

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