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bootconfig: Print array as multiple commands for legacy command line

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Print arraied values as multiple same options for legacy
kernel command line. With this rule, if the "kernel.*" and
"init.*" array entries in bootconfig are printed out as
multiple same options, e.g.

kernel {
 console = "ttyS0,115200"
 console += "tty0"
}

will be correctly converted to

console="ttyS0,115200" console="tty0"

in the kernel command line.

Link: http://lkml.kernel.org/r/158220118213.26565.8163300497009463916.stgit@devnote2

Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
This commit is contained in:
Masami Hiramatsu 2020-02-20 21:19:42 +09:00 committed by Steven Rostedt (VMware)
parent a24d286f36
commit 88b913718d
1 changed files with 10 additions and 16 deletions
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26
init/main.c
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@ -268,7 +268,6 @@ static int __init xbc_snprint_cmdline(char *buf, size_t size,
{
struct xbc_node *knode, *vnode;
char *end = buf + size;
char c = '\"';
const char *val;
int ret;
@ -279,25 +278,20 @@ static int __init xbc_snprint_cmdline(char *buf, size_t size,
return ret;
vnode = xbc_node_get_child(knode);
ret = snprintf(buf, rest(buf, end), "%s%c", xbc_namebuf,
vnode ? '=' : ' ');
if (ret < 0)
return ret;
buf += ret;
if (!vnode)
continue;
c = '\"';
xbc_array_for_each_value(vnode, val) {
ret = snprintf(buf, rest(buf, end), "%c%s", c, val);
if (!vnode) {
ret = snprintf(buf, rest(buf, end), "%s ", xbc_namebuf);
if (ret < 0)
return ret;
buf += ret;
continue;
}
xbc_array_for_each_value(vnode, val) {
ret = snprintf(buf, rest(buf, end), "%s=\"%s\" ",
xbc_namebuf, val);
if (ret < 0)
return ret;
buf += ret;
c = ',';
}
if (rest(buf, end) > 2)
strcpy(buf, "\" ");
buf += 2;
}
return buf - (end - size);