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cdba: Add option to run cdba-server locally without ssh

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cdba is mainly intended for remote usage, but it also works well for
controlling devices that you just need occasionally and then directly
connect to your local laptop instead of a remote server.

Another use case is if you just use cdba to power up a standard distro on a
remote board and then SSH into it remotely. To avoid interruptions, it's
better to start cdba locally on the server in a tmux session. That way,
temporary disconnections do not power down the board.

From a protocol perspective, everything is transferred through STDIN and
STDOUT. It makes no difference if we have ssh piping the data to a remote
server, or if the data is directly passed to the cdba-server binary started
locally. The functionality works exactly the same.

Add an option for this in the cdba client. If the -h <host> option is
omitted, cdba-server is started locally.
This commit is contained in:
Stephan Gerhold
2025-01-10 14:34:00 +01:00
parent 828d76df63
commit 06531f3db1
2 changed files with 13 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
README
View File

@@ -19,11 +19,12 @@ from sandbox/cdba/cdba-server. Available devices are read from $HOME/.cdba
= Client side
The client is invoked as:
cdba -b <board> -h <host> [-c <power-cylce-count>] [-s <status-fifo>] [boot.img]
cdba -b <board> [-h <host>] [-c <power-cylce-count>] [-s <status-fifo>] [boot.img]
<host> will be connected to using ssh and <board> will be selected for
operation. As the board's fastboot interface shows up the given boot.img
will be transfered and booted on the device. If [boot.img] is omitted,
will be transfered and booted on the device. If <host> is omitted, the
cdba-server is started locally without using ssh. If [boot.img] is omitted,
"fastboot continue" is run to boot the installed operating system.
The board will execute until the key sequence ^A q is invoked or the board

18
cdba.c
View File

@@ -103,8 +103,13 @@ static int fork_ssh(const char *host, const char *cmd, int *pipes)
close(piped_stderr[0]);
close(piped_stderr[1]);
execlp("ssh", "ssh", host, cmd, NULL);
err(1, "launching ssh failed");
if (host) {
execlp("ssh", "ssh", host, cmd, NULL);
err(1, "launching ssh failed");
} else {
execlp(cmd, cmd, NULL);
err(1, "launching cdba-server failed");
}
default:
close(piped_stdin[0]);
close(piped_stdout[1]);
@@ -583,12 +588,12 @@ static void usage(void)
{
extern const char *__progname;
fprintf(stderr, "usage: %s -b <board> -h <host> [-t <timeout>] "
fprintf(stderr, "usage: %s -b <board> [-h <host>] [-t <timeout>] "
"[-T <inactivity-timeout>] [boot.img]\n",
__progname);
fprintf(stderr, "usage: %s -i -b <board> -h <host>\n",
fprintf(stderr, "usage: %s -i -b <board> [-h <host>]\n",
__progname);
fprintf(stderr, "usage: %s -l -h <host>\n",
fprintf(stderr, "usage: %s -l [-h <host>]\n",
__progname);
exit(1);
}
@@ -667,9 +672,6 @@ int main(int argc, char **argv)
}
}
if (!host)
usage();
switch (verb) {
case CDBA_BOOT:
if (optind > argc || !board)