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https://git.postgresql.org/git/postgresql.git
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98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/*
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* dump.c
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*
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* dump functions
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*/
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#include "pg_upgrade.h"
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void
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generate_old_dump(migratorContext *ctx)
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{
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/* run new pg_dumpall binary */
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prep_status(ctx, "Creating catalog dump");
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/*
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* --binary-upgrade records the width of dropped columns in pg_class, and
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* restores the frozenid's for databases and relations.
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*/
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exec_prog(ctx, true,
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SYSTEMQUOTE "\"%s/pg_dumpall\" --port %d --schema-only "
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"--binary-upgrade > \"%s/" ALL_DUMP_FILE "\"" SYSTEMQUOTE,
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ctx->new.bindir, ctx->old.port, ctx->output_dir);
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check_ok(ctx);
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}
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/*
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* split_old_dump
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*
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* This function splits pg_dumpall output into global values and
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* database creation, and per-db schemas. This allows us to create
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* the toast place holders between restoring these two parts of the
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* dump. We split on the first "\connect " after a CREATE ROLE
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* username match; this is where the per-db restore starts.
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*
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* We suppress recreation of our own username so we don't generate
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* an error during restore
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*/
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void
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split_old_dump(migratorContext *ctx)
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{
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FILE *all_dump,
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*globals_dump,
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*db_dump;
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FILE *current_output;
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char line[LINE_ALLOC];
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bool start_of_line = true;
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char create_role_str[MAX_STRING];
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char create_role_str_quote[MAX_STRING];
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char filename[MAXPGPATH];
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bool suppressed_username = false;
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snprintf(filename, sizeof(filename), "%s/%s", ctx->output_dir, ALL_DUMP_FILE);
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if ((all_dump = fopen(filename, "r")) == NULL)
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pg_log(ctx, PG_FATAL, "Cannot open dump file %s\n", filename);
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snprintf(filename, sizeof(filename), "%s/%s", ctx->output_dir, GLOBALS_DUMP_FILE);
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if ((globals_dump = fopen(filename, "w")) == NULL)
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pg_log(ctx, PG_FATAL, "Cannot write to dump file %s\n", filename);
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snprintf(filename, sizeof(filename), "%s/%s", ctx->output_dir, DB_DUMP_FILE);
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if ((db_dump = fopen(filename, "w")) == NULL)
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pg_log(ctx, PG_FATAL, "Cannot write to dump file %s\n", filename);
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current_output = globals_dump;
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/* patterns used to prevent our own username from being recreated */
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snprintf(create_role_str, sizeof(create_role_str),
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"CREATE ROLE %s;", ctx->user);
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snprintf(create_role_str_quote, sizeof(create_role_str_quote),
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"CREATE ROLE %s;", quote_identifier(ctx, ctx->user));
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while (fgets(line, sizeof(line), all_dump) != NULL)
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{
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/* switch to db_dump file output? */
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if (current_output == globals_dump && start_of_line &&
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suppressed_username &&
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strncmp(line, "\\connect ", strlen("\\connect ")) == 0)
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current_output = db_dump;
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/* output unless we are recreating our own username */
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if (current_output != globals_dump || !start_of_line ||
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(strncmp(line, create_role_str, strlen(create_role_str)) != 0 &&
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strncmp(line, create_role_str_quote, strlen(create_role_str_quote)) != 0))
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fputs(line, current_output);
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else
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suppressed_username = true;
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if (strlen(line) > 0 && line[strlen(line) - 1] == '\n')
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start_of_line = true;
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else
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start_of_line = false;
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}
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fclose(all_dump);
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fclose(globals_dump);
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fclose(db_dump);
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}
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