diff options
Diffstat (limited to 'fish/cmds.c')
| -rw-r--r-- | fish/cmds.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/fish/cmds.c b/fish/cmds.c index 4529d291..561018ab 100644 --- a/fish/cmds.c +++ b/fish/cmds.c @@ -66,6 +66,7 @@ void list_commands (void) printf ("%-20s %s\n", "cp", "copy a file"); printf ("%-20s %s\n", "cp-a", "copy a file or directory recursively"); printf ("%-20s %s\n", "debug", "debugging and internals"); + printf ("%-20s %s\n", "dmesg", "return kernel messages"); printf ("%-20s %s\n", "download", "download a file to the local machine"); printf ("%-20s %s\n", "drop-caches", "drop kernel page cache, dentries and inodes"); printf ("%-20s %s\n", "exists", "test if file or directory exists"); @@ -468,6 +469,9 @@ void display_command (const char *cmd) if (strcasecmp (cmd, "drop_caches") == 0 || strcasecmp (cmd, "drop-caches") == 0) pod2text ("drop-caches - drop kernel page cache, dentries and inodes", " drop-caches <whattodrop>\n\nThis instructs the guest kernel to drop its page cache,\nand/or dentries and inode caches. The parameter C<whattodrop>\ntells the kernel what precisely to drop, see\nL<http://linux-mm.org/Drop_Caches>\n\nSetting C<whattodrop> to 3 should drop everything.\n\nThis automatically calls L<sync(2)> before the operation,\nso that the maximum guest memory is freed."); else + if (strcasecmp (cmd, "dmesg") == 0) + pod2text ("dmesg - return kernel messages", " dmesg\n\nThis returns the kernel messages (C<dmesg> output) from\nthe guest kernel. This is sometimes useful for extended\ndebugging of problems.\n\nAnother way to get the same information is to enable\nverbose messages with C<set_verbose> or by setting\nthe environment variable C<LIBGUESTFS_DEBUG=1> before\nrunning the program."); + else display_builtin_command (cmd); } @@ -2280,6 +2284,21 @@ static int run_drop_caches (const char *cmd, int argc, char *argv[]) return r; } +static int run_dmesg (const char *cmd, int argc, char *argv[]) +{ + char *r; + if (argc != 0) { + fprintf (stderr, "%s should have 0 parameter(s)\n", cmd); + fprintf (stderr, "type 'help %s' for help on %s\n", cmd, cmd); + return -1; + } + r = guestfs_dmesg (g); + if (r == NULL) return -1; + printf ("%s\n", r); + free (r); + return 0; +} + int run_action (const char *cmd, int argc, char *argv[]) { if (strcasecmp (cmd, "launch") == 0 || strcasecmp (cmd, "run") == 0) @@ -2606,6 +2625,9 @@ int run_action (const char *cmd, int argc, char *argv[]) if (strcasecmp (cmd, "drop_caches") == 0 || strcasecmp (cmd, "drop-caches") == 0) return run_drop_caches (cmd, argc, argv); else + if (strcasecmp (cmd, "dmesg") == 0) + return run_dmesg (cmd, argc, argv); + else { fprintf (stderr, "%s: unknown command\n", cmd); return -1; |