1 files changed, 108 insertions, 0 deletions
diff --git a/src/bin/pg_dump/pg_backup_utils.c b/src/bin/pg_dump/pg_backup_utils.c
new file mode 100644
index 0000000..c709a40
--- /dev/null
+++ b/src/bin/pg_dump/pg_backup_utils.c
@@ -0,0 +1,108 @@
+/*-------------------------------------------------------------------------
+ *
+ * pg_backup_utils.c
+ *	Utility routines shared by pg_dump and pg_restore
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/bin/pg_dump/pg_backup_utils.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres_fe.h"
+
+#include "parallel.h"
+#include "pg_backup_utils.h"
+
+/* Globals exported by this file */
+const char *progname = NULL;
+
+#define MAX_ON_EXIT_NICELY				20
+
+static struct
+{
+	on_exit_nicely_callback function;
+	void	   *arg;
+}			on_exit_nicely_list[MAX_ON_EXIT_NICELY];
+
+static int	on_exit_nicely_index;
+
+/*
+ * Parse a --section=foo command line argument.
+ *
+ * Set or update the bitmask in *dumpSections according to arg.
+ * dumpSections is initialised as DUMP_UNSECTIONED by pg_dump and
+ * pg_restore so they can know if this has even been called.
+ */
+void
+set_dump_section(const char *arg, int *dumpSections)
+{
+	/* if this is the first call, clear all the bits */
+	if (*dumpSections == DUMP_UNSECTIONED)
+		*dumpSections = 0;
+
+	if (strcmp(arg, "pre-data") == 0)
+		*dumpSections |= DUMP_PRE_DATA;
+	else if (strcmp(arg, "data") == 0)
+		*dumpSections |= DUMP_DATA;
+	else if (strcmp(arg, "post-data") == 0)
+		*dumpSections |= DUMP_POST_DATA;
+	else
+	{
+		pg_log_error("unrecognized section name: \"%s\"", arg);
+		fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
+				progname);
+		exit_nicely(1);
+	}
+}
+
+
+/* Register a callback to be run when exit_nicely is invoked. */
+void
+on_exit_nicely(on_exit_nicely_callback function, void *arg)
+{
+	if (on_exit_nicely_index >= MAX_ON_EXIT_NICELY)
+	{
+		pg_log_fatal("out of on_exit_nicely slots");
+		exit_nicely(1);
+	}
+	on_exit_nicely_list[on_exit_nicely_index].function = function;
+	on_exit_nicely_list[on_exit_nicely_index].arg = arg;
+	on_exit_nicely_index++;
+}
+
+/*
+ * Run accumulated on_exit_nicely callbacks in reverse order and then exit
+ * without printing any message.
+ *
+ * If running in a parallel worker thread on Windows, we only exit the thread,
+ * not the whole process.
+ *
+ * Note that in parallel operation on Windows, the callback(s) will be run
+ * by each thread since the list state is necessarily shared by all threads;
+ * each callback must contain logic to ensure it does only what's appropriate
+ * for its thread.  On Unix, callbacks are also run by each process, but only
+ * for callbacks established before we fork off the child processes.  (It'd
+ * be cleaner to reset the list after fork(), and let each child establish
+ * its own callbacks; but then the behavior would be completely inconsistent
+ * between Windows and Unix.  For now, just be sure to establish callbacks
+ * before forking to avoid inconsistency.)
+ */
+void
+exit_nicely(int code)
+{
+	int			i;
+
+	for (i = on_exit_nicely_index - 1; i >= 0; i--)
+		on_exit_nicely_list[i].function(code,
+										on_exit_nicely_list[i].arg);
+
+#ifdef WIN32
+	if (parallel_init_done && GetCurrentThreadId() != mainThreadId)
+		_endthreadex(code);
+#endif
+
+	exit(code);
+}