diff --git a/bcachefs.c b/bcachefs.c
index 2b004a01..12eb253d 100644
--- a/bcachefs.c
+++ b/bcachefs.c
@@ -92,14 +92,9 @@ static char *full_cmd;
static char *pop_cmd(int *argc, char *argv[])
{
- if (*argc < 2) {
- printf("%s: missing command\n", argv[0]);
- usage();
- exit(EXIT_FAILURE);
- }
-
char *cmd = argv[1];
- memmove(&argv[1], &argv[2], *argc * sizeof(argv[0]));
+ if (!(*argc < 2))
+ memmove(&argv[1], &argv[2], *argc * sizeof(argv[0]));
(*argc)--;
full_cmd = mprintf("%s %s", full_cmd, cmd);
@@ -110,10 +105,11 @@ static int fs_cmds(int argc, char *argv[])
{
char *cmd = pop_cmd(&argc, argv);
+ if (argc < 2)
+ return fs_usage();
if (!strcmp(cmd, "usage"))
return cmd_fs_usage(argc, argv);
- usage();
return 0;
}
@@ -121,6 +117,8 @@ static int device_cmds(int argc, char *argv[])
{
char *cmd = pop_cmd(&argc, argv);
+ if (argc < 2)
+ return device_usage();
if (!strcmp(cmd, "add"))
return cmd_device_add(argc, argv);
if (!strcmp(cmd, "remove"))
@@ -138,7 +136,6 @@ static int device_cmds(int argc, char *argv[])
if (!strcmp(cmd, "resize-journal"))
return cmd_device_resize_journal(argc, argv);
- usage();
return 0;
}
@@ -146,19 +143,21 @@ static int data_cmds(int argc, char *argv[])
{
char *cmd = pop_cmd(&argc, argv);
+ if (argc < 2)
+ return data_usage();
if (!strcmp(cmd, "rereplicate"))
return cmd_data_rereplicate(argc, argv);
if (!strcmp(cmd, "job"))
return cmd_data_job(argc, argv);
- usage();
return 0;
}
static int subvolume_cmds(int argc, char *argv[])
{
char *cmd = pop_cmd(&argc, argv);
-
+ if (argc < 2)
+ return subvolume_usage();
if (!strcmp(cmd, "create"))
return cmd_subvolume_create(argc, argv);
if (!strcmp(cmd, "delete"))
@@ -166,7 +165,6 @@ static int subvolume_cmds(int argc, char *argv[])
if (!strcmp(cmd, "snapshot"))
return cmd_subvolume_snapshot(argc, argv);
- usage();
return 0;
}
@@ -179,16 +177,36 @@ int main(int argc, char *argv[])
setvbuf(stdout, NULL, _IOLBF, 0);
char *cmd = pop_cmd(&argc, argv);
+ if (argc < 1) {
+ puts("missing command\n");
+ goto usage;
+ }
+
+ /* these subcommands display usage when argc < 2 */
+ if (!strcmp(cmd, "device"))
+ return device_cmds(argc, argv);
+ if (!strcmp(cmd, "fs"))
+ return fs_cmds(argc, argv);
+ if (!strcmp(cmd, "data"))
+ return data_cmds(argc, argv);
+ if (!strcmp(cmd, "subvolume"))
+ return subvolume_cmds(argc, argv);
+ if (!strcmp(cmd, "format"))
+ return cmd_format(argc, argv);
+ if (!strcmp(cmd, "fsck"))
+ return cmd_fsck(argc, argv);
+
+ if (argc < 2) {
+ printf("%s: missing command\n", argv[0]);
+ usage();
+ exit(EXIT_FAILURE);
+ }
if (!strcmp(cmd, "version"))
return cmd_version(argc, argv);
- if (!strcmp(cmd, "format"))
- return cmd_format(argc, argv);
if (!strcmp(cmd, "show-super"))
return cmd_show_super(argc, argv);
- if (!strcmp(cmd, "fsck"))
- return cmd_fsck(argc, argv);
#if 0
if (!strcmp(cmd, "assemble"))
@@ -201,17 +219,6 @@ int main(int argc, char *argv[])
return cmd_stop(argc, argv);
#endif
- if (!strcmp(cmd, "fs"))
- return fs_cmds(argc, argv);
-
- if (!strcmp(cmd, "device"))
- return device_cmds(argc, argv);
-
- if (!strcmp(cmd, "data"))
- return data_cmds(argc, argv);
- if (!strcmp(cmd, "subvolume"))
- return subvolume_cmds(argc, argv);
-
if (!strcmp(cmd, "unlock"))
return cmd_unlock(argc, argv);
if (!strcmp(cmd, "set-passphrase"))
@@ -245,6 +252,7 @@ int main(int argc, char *argv[])
}
printf("Unknown command %s\n", cmd);
+usage:
usage();
exit(EXIT_FAILURE);
}
diff --git a/cmd_data.c b/cmd_data.c
index 25a2dcb2..d78598d5 100644
--- a/cmd_data.c
+++ b/cmd_data.c
@@ -9,6 +9,19 @@
#include "cmds.h"
#include "libbcachefs.h"
+int data_usage(void)
+{
+ puts("bcachefs data - manage filesystem data\n"
+ "Usage: bcachefs data <CMD> [OPTIONS]\n"
+ "\n"
+ "Commands:\n"
+ " rereplicate Rereplicate degraded data\n"
+ " job Kick off low level data jobs\n"
+ "\n"
+ "Report bugs to <linux-bcache@vger.kernel.org>");
+ return 0;
+}
+
static void data_rereplicate_usage(void)
{
puts("bcachefs data rereplicate\n"
diff --git a/cmd_device.c b/cmd_device.c
index 87d85074..1d91ecdd 100644
--- a/cmd_device.c
+++ b/cmd_device.c
@@ -21,6 +21,25 @@
#include "libbcachefs/opts.h"
#include "tools-util.h"
+int device_usage(void)
+{
+ puts("bcachefs device - manage devices within a running filesystem\n"
+ "Usage: bcachefs device <CMD> [OPTION]\n"
+ "\n"
+ "Commands:\n"
+ " add add a new device to an existing filesystem\n"
+ " remove remove a device from an existing filesystem\n"
+ " online re-add an existing member to a filesystem\n"
+ " offline take a device offline, without removing it\n"
+ " evacuate migrate data off a specific device\n"
+ " set-state mark a device as failed\n"
+ " resize resize filesystem on a device\n"
+ " resize-journal resize journal on a device\n"
+ "\n"
+ "Report bugs to <linux-bcachefs@vger.kernel.org>");
+ return 0;
+}
+
static void device_add_usage(void)
{
puts("bcachefs device add - add a device to an existing filesystem\n"
diff --git a/cmd_fs.c b/cmd_fs.c
index 8b9d91b8..f8c46429 100644
--- a/cmd_fs.c
+++ b/cmd_fs.c
@@ -195,6 +195,18 @@ static void print_fs_usage(const char *path, enum units units)
bcache_fs_close(fs);
}
+int fs_usage(void)
+{
+ puts("bcachefs fs - manage a running filesystem\n"
+ "Usage: bcachefs fs <CMD> [OPTION]... path\n"
+ "\n"
+ "Commands:\n"
+ " usage show disk usage\n"
+ "\n"
+ "Report bugs to <linux-bcachefs@vger.kernel.org>");
+ return 0;
+}
+
int cmd_fs_usage(int argc, char *argv[])
{
enum units units = BYTES;
diff --git a/cmd_subvolume.c b/cmd_subvolume.c
index ee4eb750..99a302b8 100644
--- a/cmd_subvolume.c
+++ b/cmd_subvolume.c
@@ -19,6 +19,20 @@
#include "libbcachefs/opts.h"
#include "tools-util.h"
+int subvolume_usage(void)
+{
+ puts("bcachefs subvolume - manage subvolumes and snapshots\n"
+ "Usage: bcachefs subvolume <CMD> [OPTION]\n"
+ "\n"
+ "Commands:\n"
+ " create create a subvolume\n"
+ " delete delete a subvolume\n"
+ " snapshot create a snapshot\n"
+ "\n"
+ "Report bugs to <linux-bcachefs@vger.kernel.org>");
+ return 0;
+}
+
static void subvolume_create_usage(void)
{
puts("bcachefs subvolume create - create a new subvolume\n"
diff --git a/cmds.h b/cmds.h
index 0e27d6d7..52db63f3 100644
--- a/cmds.h
+++ b/cmds.h
@@ -19,8 +19,10 @@ int cmd_run(int argc, char *argv[]);
int cmd_stop(int argc, char *argv[]);
#endif
+int fs_usage(void);
int cmd_fs_usage(int argc, char *argv[]);
+int device_usage(void);
int cmd_device_add(int argc, char *argv[]);
int cmd_device_remove(int argc, char *argv[]);
int cmd_device_online(int argc, char *argv[]);
@@ -30,6 +32,7 @@ int cmd_device_set_state(int argc, char *argv[]);
int cmd_device_resize(int argc, char *argv[]);
int cmd_device_resize_journal(int argc, char *argv[]);
+int data_usage(void);
int cmd_data_rereplicate(int argc, char *argv[]);
int cmd_data_job(int argc, char *argv[]);
@@ -50,6 +53,7 @@ int cmd_version(int argc, char *argv[]);
int cmd_setattr(int argc, char *argv[]);
+int subvolume_usage(void);
int cmd_subvolume_create(int argc, char *argv[]);
int cmd_subvolume_delete(int argc, char *argv[]);
int cmd_subvolume_snapshot(int argc, char *argv[]);