48 lines
1.8 KiB
C
48 lines
1.8 KiB
C
#ifndef _W_MINIX_PROC_H
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#define _W_MINIX_PROC_H
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/*
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* This header file is tailored very specifically to the needs of w(1), which
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* needs process information but uses a BSD infrastructure (namely, the Kernel
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* Data Access Library or, eh, KVM.. huh?) which we cannot implement in MINIX3
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* without making a very, very large number of changes all over the place.
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*
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* In order to allow w(1) to function on MINIX3, we override some of the KVM
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* functionality with MINIX3 implementations, by means of #defines. While that
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* is indeed butt ugly, this approach does have advantages: we are able to
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* implement the full expected functionality with minimal changes to w(1)
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* itself, and whenever w(1) uses a KVM function or a process information field
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* that this header does not supply, w(1) will break during compilation.
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*/
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struct minix_proc {
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pid_t p_pid; /* process ID */
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pid_t p__pgid; /* process group ID */
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pid_t p_tpgid; /* tty process group ID (= p_pgid or 0) */
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dev_t p_tdev; /* controlling terminal (= tty rdev or 0) */
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char p_minix_state; /* minix specific: process kernel state */
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char p_minix_pstate; /* minix specific: process PM state */
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char p_comm[256]; /* simple command line (= process name) */
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};
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#undef kinfo_proc2
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#define kinfo_proc2 minix_proc
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struct minix_proc *minix_getproc(void *dummy, int op, int arg, int elemsize,
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int *cnt);
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#undef kvm_getproc2
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#define kvm_getproc2 minix_getproc
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#undef kvm_geterr
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#define kvm_geterr(dummy) strerror(errno)
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char **minix_getargv(void *dummy, const struct minix_proc *p, int nchr);
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#undef kvm_getargv2
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#define kvm_getargv2 minix_getargv
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int minix_proc_compare(const struct minix_proc *p1,
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const struct minix_proc *p2);
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#undef proc_compare_wrapper
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#define proc_compare_wrapper minix_proc_compare
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#endif /* !_W_MINIX_PROC_H */
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