继续分析
/* Now create all the text config files */ setup_config();
将其展开：
实质就是，确定各种参数，分别写入 postgresql.conf 、pg_hba.conf、pg_indent.conf 文件。
/* * set up all the config files */ static void setup_config(void) { char **conflines; char repltok[100]; char path[MAXPGPATH]; fputs(_("creating configuration files ... "), stdout); fflush(stdout); /* postgresql.conf */ conflines = readfile(conf_file); snprintf(repltok, sizeof(repltok), "max_connections = %d", n_connections); conflines = replace_token(conflines, "#max_connections = 100", repltok); if ((n_buffers * (BLCKSZ / 1024)) % 1024 == 0) snprintf(repltok, sizeof(repltok), "shared_buffers = %dMB", (n_buffers * (BLCKSZ / 1024)) / 1024); else snprintf(repltok, sizeof(repltok), "shared_buffers = %dkB", n_buffers * (BLCKSZ / 1024)); conflines = replace_token(conflines, "#shared_buffers = 32MB", repltok); #if DEF_PGPORT != 5432 snprintf(repltok, sizeof(repltok), "#port = %d", DEF_PGPORT); conflines = replace_token(conflines, "#port = 5432", repltok); #endif snprintf(repltok, sizeof(repltok), "lc_messages = '%s'", escape_quotes(lc_messages)); conflines = replace_token(conflines, "#lc_messages = 'C'", repltok); snprintf(repltok, sizeof(repltok), "lc_monetary = '%s'", escape_quotes(lc_monetary)); conflines = replace_token(conflines, "#lc_monetary = 'C'", repltok); snprintf(repltok, sizeof(repltok), "lc_numeric = '%s'", escape_quotes(lc_numeric)); conflines = replace_token(conflines, "#lc_numeric = 'C'", repltok); snprintf(repltok, sizeof(repltok), "lc_time = '%s'", escape_quotes(lc_time)); conflines = replace_token(conflines, "#lc_time = 'C'", repltok); switch (locale_date_order(lc_time)) { case DATEORDER_YMD: strcpy(repltok, "datestyle = 'iso, ymd'"); break; case DATEORDER_DMY: strcpy(repltok, "datestyle = 'iso, dmy'"); break; case DATEORDER_MDY: default: strcpy(repltok, "datestyle = 'iso, mdy'"); break; } conflines = replace_token(conflines, "#datestyle = 'iso, mdy'", repltok); snprintf(repltok, sizeof(repltok), "default_text_search_config = 'pg_catalog.%s'", escape_quotes(default_text_search_config)); conflines = replace_token(conflines, "#default_text_search_config = 'pg_catalog.simple'", repltok); snprintf(path, sizeof(path), "%s/postgresql.conf", pg_data); writefile(path, conflines); chmod(path, S_IRUSR | S_IWUSR); free(conflines); /* pg_hba.conf */ conflines = readfile(hba_file); #ifndef HAVE_UNIX_SOCKETS conflines = filter_lines_with_token(conflines, "@remove-line-for-nolocal@"); #else conflines = replace_token(conflines, "@remove-line-for-nolocal@", ""); #endif #ifdef HAVE_IPV6 /* * Probe to see if there is really any platform support for IPv6, and * comment out the relevant pg_hba line if not. This avoids runtime * warnings if getaddrinfo doesn't actually cope with IPv6. Particularly * useful on Windows, where executables built on a machine with IPv6 may * have to run on a machine without. */ { struct addrinfo *gai_result; struct addrinfo hints; int err = 0; #ifdef WIN32 /* need to call WSAStartup before calling getaddrinfo */ WSADATA wsaData; err = WSAStartup(MAKEWORD(2, 2), &wsaData); #endif /* for best results, this code should match parse_hba() */ hints.ai_flags = AI_NUMERICHOST; hints.ai_family = PF_UNSPEC; hints.ai_socktype = 0; hints.ai_protocol = 0; hints.ai_addrlen = 0; hints.ai_canonname = NULL; hints.ai_addr = NULL; hints.ai_next = NULL; if (err != 0 || getaddrinfo("::1", NULL, &hints, &gai_result) != 0) conflines = replace_token(conflines, "host all all ::1", "#host all all ::1"); } #else /* !HAVE_IPV6 */ /* If we didn't compile IPV6 support at all, always comment it out */ conflines = replace_token(conflines, "host all all ::1", "#host all all ::1"); #endif /* HAVE_IPV6 */ /* Replace default authentication methods */ conflines = replace_token(conflines, "@authmethod@", authmethod); conflines = replace_token(conflines, "@authmethodlocal@", authmethodlocal); conflines = replace_token(conflines, "@authcomment@", strcmp(authmethod, "trust") ? "" : AUTHTRUST_WARNING); /* Replace username for replication */ conflines = replace_token(conflines, "@default_username@", username); snprintf(path, sizeof(path), "%s/pg_hba.conf", pg_data); writefile(path, conflines); chmod(path, S_IRUSR | S_IWUSR); free(conflines); /* pg_ident.conf */ conflines = readfile(ident_file); snprintf(path, sizeof(path), "%s/pg_ident.conf", pg_data); writefile(path, conflines); chmod(path, S_IRUSR | S_IWUSR); free(conflines); check_ok(); }