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/*
* dproc.c - OpenBSD process access functions for lsof
*/
/*
* Copyright 1994 Purdue Research Foundation, West Lafayette, Indiana
* 47907. All rights reserved.
*
* Written by Victor A. Abell
*
* This software is not subject to any license of the American Telephone
* and Telegraph Company or the Regents of the University of California.
*
* Permission is granted to anyone to use this software for any purpose on
* any computer system, and to alter it and redistribute it freely, subject
* to the following restrictions:
*
* 1. Neither the authors nor Purdue University are responsible for any
* consequences of the use of this software.
*
* 2. The origin of this software must not be misrepresented, either by
* explicit claim or by omission. Credit to the authors and Purdue
* University must appear in documentation and sources.
*
* 3. Altered versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 4. This notice may not be removed or altered.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright 1994 Purdue Research Foundation.\nAll rights reserved.\n";
#endif
#include "common.h"
static void process_kinfo_file(struct lsof_context *ctx,
struct kinfo_file *file);
/*
* Local static values
*/
/*
* gather_proc_info() -- gather process information
*/
void gather_proc_info(struct lsof_context *ctx) {
short pss, sf;
uid_t uid;
struct stat st;
int mib[6];
size_t size = 0;
int res;
struct kinfo_proc *procs = NULL;
struct kinfo_proc *proc;
int num_procs;
int px; /* process loop index */
struct kinfo_file *files = NULL;
struct kinfo_file *file;
int num_files;
int fx; /* file loop index */
char path[PATH_MAX];
/*
* Read the process table.
*/
/* See OpenSBD kernel sys/kern/kern_sysctl.c sysctl_doproc */
/* sysctl(CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc),
* count) */
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_ALL; /* op */
mib[3] = 0; /* arg */
mib[4] = sizeof(struct kinfo_proc); /* elem_size */
/* Loop to probe size, learned from libkvm */
while (1) {
mib[5] = 0; /* elem_count */
/* Probe number of entries */
if (sysctl(mib, 6, NULL, &size, NULL, 0) < 0) {
(void)fprintf(stderr, "%s: can't read process table: %d\n", Pn,
errno);
Error(ctx);
}
/* Alloc more to handle new processes in the meantime */
size = (size_t)(size / sizeof(struct kinfo_proc) * 1.1) *
sizeof(struct kinfo_proc);
if (!procs) {
procs = (struct kinfo_proc *)malloc(size);
} else {
procs = (struct kinfo_proc *)realloc(procs, size);
}
if (!procs) {
(void)fprintf(stderr, "%s: no kinfo_proc * space\n", Pn);
Error(ctx);
}
mib[5] = size / sizeof(struct kinfo_proc); /* elem_count */
res = sysctl(mib, 6, procs, &size, NULL, 0);
if (res >= 0) {
num_procs = size / sizeof(struct kinfo_proc);
break;
} else if (res < 0 && errno != ENOMEM) {
(void)fprintf(stderr, "%s: can't read process table: %d\n", Pn,
errno);
Error(ctx);
}
};
/*
* Examine proc structures and their associated information.
*/
for (proc = procs, px = 0; px < num_procs; px++, proc++) {
if (proc->p_stat == 0 || proc->p_stat == SZOMB)
continue;
/*
* Read process information, process group structure (if
* necessary), and User ID (if necessary).
*
* See if process is excluded.
*
* Read file structure pointers.
*/
uid = proc->p_uid;
if (is_proc_excl(ctx, (int)proc->p_pid, (int)proc->p__pgid,
(UID_ARG)uid, &pss, &sf)) {
continue;
}
/*
* Allocate a local process structure.
*/
if (is_cmd_excl(ctx, proc->p_comm, &pss, &sf))
continue;
alloc_lproc(ctx, (int)proc->p_pid, (int)proc->p__pgid,
(int)proc->p_ppid, (UID_ARG)uid, proc->p_comm, (int)pss,
(int)sf);
Plf = (struct lfile *)NULL; /* Empty list head */
/*
* Read open file structure pointers.
* sysctl(CTL_KERN, KERN_FILE, KERN_FILE_BYPID, pid, sizeof(struct
* kinfo_file), count)
*/
mib[0] = CTL_KERN;
mib[1] = KERN_FILE;
mib[2] = KERN_FILE_BYPID;
mib[3] = proc->p_pid;
mib[4] = sizeof(struct kinfo_file);
size = 0;
/* Loop to probe size, learned from libkvm */
while (1) {
mib[5] = 0; /* elem_count */
/* Probe number of entries */
if (sysctl(mib, 6, NULL, &size, NULL, 0) < 0) {
(void)fprintf(stderr, "%s: can't read file table: %d\n", Pn,
errno);
Error(ctx);
}
/* Alloc more to handle new processes in the meantime */
size = (size_t)(size / sizeof(struct kinfo_file) * 1.1) *
sizeof(struct kinfo_file);
if (!files) {
files = (struct kinfo_file *)malloc(size);
} else {
files = (struct kinfo_file *)realloc(files, size);
}
if (!files) {
(void)fprintf(stderr, "%s: no kinfo_file * space\n", Pn);
Error(ctx);
}
mib[5] = size / sizeof(struct kinfo_file); /* elem_count */
res = sysctl(mib, 6, files, &size, NULL, 0);
if (res >= 0) {
num_files = size / sizeof(struct kinfo_file);
break;
} else if (res < 0 && errno != ENOMEM) {
(void)fprintf(stderr, "%s: can't read file table: %d\n", Pn,
errno);
Error(ctx);
}
};
for (file = files, fx = 0; fx < num_files; fx++, file++) {
process_kinfo_file(ctx, file);
}
/*
* Examine results.
*/
if (examine_lproc(ctx))
return;
}
}
/*
* initialize() - perform all initialization
*/
void initialize(struct lsof_context *ctx) {}
/*
* process_kinfo_file() - process kinfo_file
*/
void process_kinfo_file(struct lsof_context *ctx, struct kinfo_file *file) {
switch (file->f_type) {
case DTYPE_VNODE: /* file */
process_vnode(ctx, file);
break;
case DTYPE_SOCKET:
process_socket(ctx, file);
break;
case DTYPE_PIPE:
process_pipe(ctx, file);
break;
case DTYPE_KQUEUE:
process_kqueue_file(ctx, file);
break;
}
}
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