zed: purge all mentions of a configuration file

There simply isn't a need for one, since the flags the daemon takes
are all short (mostly just toggles) and administrative in nature,
and are therefore better served by the age-old tradition of sourcing an
environment file and preparing the cmdline in the init-specific handler
itself, if needed at all

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes openzfs#11834

cmd/zed/zed.c

@@ -230,8 +230,6 @@ main(int argc, char *argv[])
 	if (geteuid() != 0)
 		zed_log_die("Must be run as root");
 
-	zed_conf_parse_file(zcp);
-
 	zed_file_close_from(STDERR_FILENO + 1);
 
 	(void) umask(0);

cmd/zed/zed.h

@@ -15,11 +15,6 @@
 #ifndef	ZED_H
 #define	ZED_H
 
-/*
- * Absolute path for the default zed configuration file.
- */
-#define	ZED_CONF_FILE		SYSCONFDIR "/zfs/zed.conf"
-
 /*
  * Absolute path for the default zed pid file.
  */

cmd/zed/zed_conf.c

@@ -53,9 +53,6 @@ zed_conf_create(void)
 	zcp->zevent_fd = -1;		/* opened via zed_event_init() */
 	zcp->max_jobs = 16;
 
-	if (!(zcp->conf_file = strdup(ZED_CONF_FILE)))
-		goto nomem;
-
 	if (!(zcp->pid_file = strdup(ZED_PID_FILE)))
 		goto nomem;
 
@@ -103,10 +100,6 @@ zed_conf_destroy(struct zed_conf *zcp)
 			    zcp->pid_file, strerror(errno));
 		zcp->pid_fd = -1;
 	}
-	if (zcp->conf_file) {
-		free(zcp->conf_file);
-		zcp->conf_file = NULL;
-	}
 	if (zcp->pid_file) {
 		free(zcp->pid_file);
 		zcp->pid_file = NULL;
@@ -163,10 +156,6 @@ _zed_conf_display_help(const char *prog, int got_err)
 	fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-Z",
 	    "Zero state file.");
 	fprintf(fp, "\n");
-#if 0
-	fprintf(fp, "%*c%*s %s [%s]\n", w1, 0x20, -w2, "-c FILE",
-	    "Read configuration from FILE.", ZED_CONF_FILE);
-#endif
 	fprintf(fp, "%*c%*s %s [%s]\n", w1, 0x20, -w2, "-d DIR",
 	    "Read enabled ZEDLETs from DIR.", ZED_ZEDLET_DIR);
 	fprintf(fp, "%*c%*s %s [%s]\n", w1, 0x20, -w2, "-p FILE",
@@ -254,7 +243,7 @@ _zed_conf_parse_path(char **resultp, const char *path)
 void
 zed_conf_parse_opts(struct zed_conf *zcp, int argc, char **argv)
 {
-	const char * const opts = ":hLVc:d:p:P:s:vfFMZIj:";
+	const char * const opts = ":hLVd:p:P:s:vfFMZIj:";
 	int opt;
 	unsigned long raw;
 
@@ -274,9 +263,6 @@ zed_conf_parse_opts(struct zed_conf *zcp, int argc, char **argv)
 		case 'V':
 			_zed_conf_display_version();
 			break;
-		case 'c':
-			_zed_conf_parse_path(&zcp->conf_file, optarg);
-			break;
 		case 'd':
 			_zed_conf_parse_path(&zcp->zedlet_dir, optarg);
 			break;
@@ -331,18 +317,6 @@ zed_conf_parse_opts(struct zed_conf *zcp, int argc, char **argv)
 	}
 }
 
-/*
- * Parse the configuration file into the configuration [zcp].
- *
- * FIXME: Not yet implemented.
- */
-void
-zed_conf_parse_file(struct zed_conf *zcp)
-{
-	if (!zcp)
-		zed_log_die("Failed to parse config: %s", strerror(EINVAL));
-}
-
 /*
  * Scan the [zcp] zedlet_dir for files to exec based on the event class.
  * Files must be executable by user, but not writable by group or other.

cmd/zed/zed_conf.h

@@ -29,7 +29,6 @@ struct zed_conf {
 	int		syslog_facility;	/* syslog facility value */
 	int		min_events;		/* RESERVED FOR FUTURE USE */
 	int		max_events;		/* RESERVED FOR FUTURE USE */
-	char		*conf_file;		/* abs path to config file */
 	char		*pid_file;		/* abs path to pid file */
 	int		pid_fd;			/* fd to pid file for lock */
 	char		*zedlet_dir;		/* abs path to zedlet dir */
@@ -48,8 +47,6 @@ void zed_conf_destroy(struct zed_conf *zcp);
 
 void zed_conf_parse_opts(struct zed_conf *zcp, int argc, char **argv);
 
-void zed_conf_parse_file(struct zed_conf *zcp);
-
 int zed_conf_scan_dir(struct zed_conf *zcp);
 
 int zed_conf_write_pid(struct zed_conf *zcp);

man/man8/zed.8.in

@@ -76,9 +76,6 @@ while the daemon is running.
 .BI \-Z
 Zero the daemon's state, thereby allowing zevents still within the kernel
 to be reprocessed.
-.\" .TP
-.\" .BI \-c\  configfile
-.\" Read the configuration from the specified file.
 .TP
 .BI \-d\  zedletdir
 Read the enabled ZEDLETs from the specified directory.
@@ -203,9 +200,6 @@ the following executables are defined: \fBZDB\fR, \fBZED\fR, \fBZFS\fR,
 rc file if needed.
 
 .SH FILES
-.\" .TP
-.\" @sysconfdir@/zfs/zed.conf
-.\" The default configuration file for the daemon.
 .TP
 .I @sysconfdir@/zfs/zed.d
 The default directory for enabled ZEDLETs.
@@ -250,8 +244,6 @@ environment variables having a "_NOT_IMPLEMENTED_" value.
 .PP
 Internationalization support via gettext has not been added.
 .PP
-The configuration file is not yet implemented.
-.PP
 The diagnosis engine is not yet implemented.
 
 .SH LICENSE