64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
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#include "inc.h"
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#include <sys/svrctl.h>
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const char *
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svrctl_name(unsigned long req)
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{
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switch (req) {
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NAME(PMSETPARAM);
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NAME(PMGETPARAM);
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NAME(VFSGETPARAM);
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NAME(VFSSETPARAM);
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}
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return NULL;
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}
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int
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svrctl_arg(struct trace_proc * proc, unsigned long req, void * ptr, int dir)
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{
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struct sysgetenv *env;
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switch (req) {
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case PMSETPARAM:
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case VFSSETPARAM:
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if ((env = (struct sysgetenv *)ptr) == NULL)
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return IF_OUT;
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put_buf(proc, "key", PF_STRING, (vir_bytes)env->key,
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env->keylen);
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put_buf(proc, "value", PF_STRING, (vir_bytes)env->val,
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env->vallen);
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return IF_ALL;
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case PMGETPARAM:
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case VFSGETPARAM:
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if ((env = (struct sysgetenv *)ptr) == NULL)
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return IF_OUT | IF_IN;
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/*
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* So far this is the only IOCTL case where the output depends
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* on one of the values in the input: if the given key is NULL,
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* PM provides the entire system environment in return, which
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* means we cannot just print a single string. We rely on PM
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* not changing the key field, which (while true) is an
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* assumption. With the current (simple) model we would have
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* to save the provided key pointer somewhere otherwise.
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*/
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if (dir == IF_OUT)
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put_buf(proc, "key", PF_STRING, (vir_bytes)env->key,
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env->keylen);
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else
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put_buf(proc, "value",
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(env->key != NULL) ? PF_STRING : 0,
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(vir_bytes)env->val, env->vallen);
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return IF_ALL;
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default:
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return 0;
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}
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}
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