pg_regress_main.c

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/*-------------------------------------------------------------------------
 *
 * pg_regress_main --- regression test for the main backend
 *
 * This is a C implementation of the previous shell script for running
 * the regression tests, and should be mostly compatible with it.
 * Initial author of C translation: Magnus Hagander
 *
 * This code is released under the terms of the PostgreSQL License.
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/test/regress/pg_regress_main.c
 *
 *-------------------------------------------------------------------------
 */
 
#include "postgres_fe.h"
 
#include "lib/stringinfo.h"
#include "pg_regress.h"
 
/*
 * start a psql test process for specified file (including redirection),
 * and return process ID
 */
static PID_TYPE
psql_start_test(const char *testname,
                _stringlist **resultfiles,
                _stringlist **expectfiles,
                _stringlist **tags)
{
    PID_TYPE    pid;
    char        infile[MAXPGPATH];
    char        outfile[MAXPGPATH];
    char        expectfile[MAXPGPATH];
    StringInfoData psql_cmd;
    char       *appnameenv;
 
    /*
     * Look for files in the output dir first, consistent with a vpath search.
     * This is mainly to create more reasonable error messages if the file is
     * not found.  It also allows local test overrides when running pg_regress
     * outside of the source tree.
     */
    snprintf(infile, sizeof(infile), "%s/sql/%s.sql",
             outputdir, testname);
    if (!file_exists(infile))
        snprintf(infile, sizeof(infile), "%s/sql/%s.sql",
                 inputdir, testname);
 
    snprintf(outfile, sizeof(outfile), "%s/results/%s.out",
             outputdir, testname);
 
    snprintf(expectfile, sizeof(expectfile), "%s/expected/%s.out",
             expecteddir, testname);
    if (!file_exists(expectfile))
        snprintf(expectfile, sizeof(expectfile), "%s/expected/%s.out",
                 inputdir, testname);
 
    add_stringlist_item(resultfiles, outfile);
    add_stringlist_item(expectfiles, expectfile);
 
    initStringInfo(&psql_cmd);
 
    if (launcher)
        appendStringInfo(&psql_cmd, "%s ", launcher);
 
    /*
     * Use HIDE_TABLEAM to hide different AMs to allow to use regression tests
     * against different AMs without unnecessary differences.
     */
    appendStringInfo(&psql_cmd,
                     "\"%s%spsql\" -X -a -q -d \"%s\" %s < \"%s\" > \"%s\" 2>&1",
                     bindir ? bindir : "",
                     bindir ? "/" : "",
                     dblist->str,
                     "-v HIDE_TABLEAM=on -v HIDE_TOAST_COMPRESSION=on",
                     infile,
                     outfile);
 
    appnameenv = psprintf("pg_regress/%s", testname);
    setenv("PGAPPNAME", appnameenv, 1);
    free(appnameenv);
 
    pid = spawn_process(psql_cmd.data);
 
    if (pid == INVALID_PID)
    {
        fprintf(stderr, _("could not start process for test %s\n"),
                testname);
        exit(2);
    }
 
    unsetenv("PGAPPNAME");
 
    pfree(psql_cmd.data);
 
    return pid;
}
 
static void
psql_init(int argc, char **argv)
{
    /* set default regression database name */
    add_stringlist_item(&dblist, "regression");
}
 
int
main(int argc, char *argv[])
{
    return regression_main(argc, argv,
                           psql_init,
                           psql_start_test,
                           NULL /* no postfunc needed */ );
}