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authorRusty Russell <rusty@rustcorp.com.au>2014-04-28 11:34:33 +0930
committerRusty Russell <rusty@rustcorp.com.au>2014-04-28 11:48:34 +0930
commit51e158c12aca3c9ac63988611a97c05109b14dc9 (patch)
tree579ef4259a17200a77ec111c6a6ca082d43a368d /kernel/params.c
parent2ee41e62ba5b952e9d9fcba6f7079a0c608bb849 (diff)
downloadlinux-sh-51e158c12aca3c9ac63988611a97c05109b14dc9.tar.gz
param: hand arguments after -- straight to init
The kernel passes any args it doesn't need through to init, except it assumes anything containing '.' belongs to the kernel (for a module). This change means all users can clearly distinguish which arguments are for init. For example, the kernel uses debug ("dee-bug") to mean log everything to the console, where systemd uses the debug from the Scandinavian "day-boog" meaning "fail to boot". If a future versions uses argv[] instead of reading /proc/cmdline, this confusion will be avoided. eg: test 'FOO="this is --foo"' -- 'systemd.debug="true true true"' Gives: argv[0] = '/debug-init' argv[1] = 'test' argv[2] = 'systemd.debug=true true true' envp[0] = 'HOME=/' envp[1] = 'TERM=linux' envp[2] = 'FOO=this is --foo' Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'kernel/params.c')
-rw-r--r--kernel/params.c25
1 files changed, 14 insertions, 11 deletions
diff --git a/kernel/params.c b/kernel/params.c
index b00142e7f3ba..1e52ca233fd9 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -177,13 +177,13 @@ static char *next_arg(char *args, char **param, char **val)
}
/* Args looks like "foo=bar,bar2 baz=fuz wiz". */
-int parse_args(const char *doing,
- char *args,
- const struct kernel_param *params,
- unsigned num,
- s16 min_level,
- s16 max_level,
- int (*unknown)(char *param, char *val, const char *doing))
+char *parse_args(const char *doing,
+ char *args,
+ const struct kernel_param *params,
+ unsigned num,
+ s16 min_level,
+ s16 max_level,
+ int (*unknown)(char *param, char *val, const char *doing))
{
char *param, *val;
@@ -198,6 +198,9 @@ int parse_args(const char *doing,
int irq_was_disabled;
args = next_arg(args, &param, &val);
+ /* Stop at -- */
+ if (!val && strcmp(param, "--") == 0)
+ return args;
irq_was_disabled = irqs_disabled();
ret = parse_one(param, val, doing, params, num,
min_level, max_level, unknown);
@@ -208,22 +211,22 @@ int parse_args(const char *doing,
switch (ret) {
case -ENOENT:
pr_err("%s: Unknown parameter `%s'\n", doing, param);
- return ret;
+ return ERR_PTR(ret);
case -ENOSPC:
pr_err("%s: `%s' too large for parameter `%s'\n",
doing, val ?: "", param);
- return ret;
+ return ERR_PTR(ret);
case 0:
break;
default:
pr_err("%s: `%s' invalid for parameter `%s'\n",
doing, val ?: "", param);
- return ret;
+ return ERR_PTR(ret);
}
}
/* All parsed OK. */
- return 0;
+ return NULL;
}
/* Lazy bastard, eh? */