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/* support for master.cf
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/* #include <postconf.h>
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/* void read_master(fail_on_open)
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/* void show_master(mode, filters)
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/* read_master() reads entries from master.cf into memory.
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/* show_master() writes the entries in the master.cf file
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/* to standard output.
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/* Specify FAIL_ON_OPEN if open failure is a fatal error,
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/* WARN_ON_OPEN if a warning should be logged instead.
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/* If the FOLD_LINE flag is set, show_master() wraps long
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/* A list of zero or more expressions in master_service(3)
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/* format. If no list is specified, show_master() outputs
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/* all master.cf entries in the specified order.
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/* Problems are reported to the standard error stream.
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/* The Secure Mailer license must be distributed with this software.
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/* IBM T.J. Watson Research
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/* Yorktown Heights, NY 10598, USA
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/* Utility library. */
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#include <readlline.h>
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#include <stringops.h>
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#include <mail_params.h>
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#include <match_service.h>
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/* Application-specific. */
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#define STR(x) vstring_str(x)
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/* normalize_options - bring options into canonical form */
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static void normalize_options(ARGV *argv)
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* Normalize options to simplify later processing.
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for (field = PC_MASTER_MIN_FIELDS; argv->argv[field] != 0; field++) {
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arg = argv->argv[field];
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if (arg[0] != '-' || strcmp(arg, "--") == 0)
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if (strncmp(arg, "-o", 2) == 0) {
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/* Split "-oname=value" into "-o" "name=value". */
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argv_insert_one(argv, field + 1, arg + 2);
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argv_replace_one(argv, field, "-o");
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/* arg is now a dangling pointer. */
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} else if (argv->argv[field + 1] != 0) {
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/* Already in "-o" "name=value" form. */
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/* read_master - read and digest the master.cf file */
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void read_master(int fail_on_open_error)
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const char *myname = "read_master";
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if (master_table != 0)
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msg_panic("%s: master table is already initialized", myname);
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* Get the location of master.cf.
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if (var_config_dir == 0)
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path = concatenate(var_config_dir, "/", MASTER_CONF_FILE, (char *) 0);
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* We can't use the master daemon's master_ent routines in their current
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* form. They convert everything to internal form, and they skip disabled
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* The postconf command needs to show default fields as "-", and needs to
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* know about all service names so that it can generate service-dependent
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* parameter names (transport-dependent etc.).
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#define MASTER_BLANKS " \t\r\n" /* XXX */
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* Initialize the in-memory master table.
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master_table = (PC_MASTER_ENT *) mymalloc(sizeof(*master_table));
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* Skip blank lines and comment lines. Degrade gracefully if master.cf is
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* not available, and master.cf is not the primary target.
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if ((fp = vstream_fopen(path, O_RDONLY, 0)) == 0) {
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if (fail_on_open_error)
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msg_fatal("open %s: %m", path);
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msg_warn("open %s: %m", path);
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buf = vstring_alloc(100);
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while (readlline(buf, fp, &line_count) != 0) {
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master_table = (PC_MASTER_ENT *) myrealloc((char *) master_table,
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(entry_count + 2) * sizeof(*master_table));
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argv = argv_split(STR(buf), MASTER_BLANKS);
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if (argv->argc < PC_MASTER_MIN_FIELDS)
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msg_fatal("file %s: line %d: bad field count",
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normalize_options(argv);
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master_table[entry_count].name_space =
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concatenate(argv->argv[0], ".", argv->argv[1], (char *) 0);
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master_table[entry_count].argv = argv;
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master_table[entry_count].valid_names = 0;
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master_table[entry_count].all_params = 0;
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* Null-terminate the master table and clean up.
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master_table[entry_count].argv = 0;
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/* print_master_line - print one master line */
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static void print_master_line(int mode, ARGV *argv)
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int in_daemon_options;
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static int column_goal[] = {
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#define ADD_TEXT(text, len) do { \
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vstream_fputs(text, VSTREAM_OUT); line_len += len; } \
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#define ADD_SPACE ADD_TEXT(" ", 1)
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* Show the standard fields at their preferred column position. Use at
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* least one-space column separation.
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for (line_len = 0, field = 0; field < PC_MASTER_MIN_FIELDS; field++) {
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arg = argv->argv[field];
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} while (line_len < column_goal[field]);
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ADD_TEXT(arg, strlen(arg));
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* Format the daemon command-line options and non-option arguments. Here,
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* we have no data-dependent preference for column positions, but we do
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* have argument grouping preferences.
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in_daemon_options = 1;
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for ( /* void */ ; argv->argv[field] != 0; field++) {
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arg = argv->argv[field];
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if (in_daemon_options) {
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* Try to show the generic options (-v -D) on the first line, and
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* non-options on a later line.
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if (arg[0] != '-' || strcmp(arg, "--") == 0) {
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in_daemon_options = 0;
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if ((mode & FOLD_LINE)
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&& line_len > column_goal[PC_MASTER_MIN_FIELDS - 1]) {
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vstream_fputs("\n" INDENT_TEXT, VSTREAM_OUT);
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line_len = INDENT_LEN;
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* Try to avoid breaking "-o name=value" over multiple lines if
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* it would fit on one line.
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else if ((mode & FOLD_LINE)
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&& line_len > INDENT_LEN && strcmp(arg, "-o") == 0
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&& (aval = argv->argv[field + 1]) != 0
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&& INDENT_LEN + 3 + strlen(aval) < LINE_LIMIT) {
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vstream_fputs("\n" INDENT_TEXT, VSTREAM_OUT);
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line_len = INDENT_LEN;
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ADD_TEXT(arg, strlen(arg));
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* Insert a line break when the next argument won't fit (unless, of
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* course, we just inserted a line break).
259
if (line_len > INDENT_LEN) {
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if ((mode & FOLD_LINE) == 0
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|| line_len + 1 + strlen(arg) < LINE_LIMIT) {
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vstream_fputs("\n" INDENT_TEXT, VSTREAM_OUT);
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line_len = INDENT_LEN;
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ADD_TEXT(arg, strlen(arg));
270
vstream_fputs("\n", VSTREAM_OUT);
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/* show_master - show master.cf entries */
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void show_master(int mode, char **filters)
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PC_MASTER_ENT *masterp;
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ARGV *service_filter = 0;
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* Initialize the service filter.
285
service_filter = match_service_init_argv(filters);
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* Iterate over the master table.
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for (masterp = master_table; (argv = masterp->argv) != 0; masterp++)
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if (service_filter == 0
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|| match_service_match(service_filter, masterp->name_space) != 0)
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print_master_line(mode, argv);
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if (service_filter != 0)
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argv_free(service_filter);
added
removed
src/postconf/postconf_master.c
