Blame sysdeps/freebsd/procwd.c

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/* Copyright (C) 2007 Joe Marcus Clarke
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   This file is part of LibGTop 2.
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   LibGTop is free software; you can redistribute it and/or modify it
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   under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 2 of the License,
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   or (at your option) any later version.
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   LibGTop is distributed in the hope that it will be useful, but WITHOUT
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   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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   for more details.
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   You should have received a copy of the GNU General Public License
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   along with LibGTop; see the file COPYING. If not, write to the
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   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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   Boston, MA 02110-1301, USA.
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*/
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#include <config.h>
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#include <glibtop/procwd.h>
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#include <glibtop/error.h>
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#include <glibtop_private.h>
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <sys/param.h>
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#include <sys/user.h>
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#ifdef HAVE_KINFO_GETFILE
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#include <libutil.h>
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#endif
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#include <string.h>
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static const unsigned long _glibtop_sysdeps_proc_wd =
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(1 << GLIBTOP_PROC_WD_EXE) |
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(1 << GLIBTOP_PROC_WD_ROOT) |
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(1 << GLIBTOP_PROC_WD_NUMBER);
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void
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_glibtop_init_proc_wd_s(glibtop *server)
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{
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	server->sysdeps.proc_wd = _glibtop_sysdeps_proc_wd;
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}
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#if (__FreeBSD_version >= 800000 && __FreeBSD_version < 800019) || __FreeBSD_version < 700104
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static GPtrArray *
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parse_output(const char *output, glibtop_proc_wd *buf)
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{
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	GPtrArray *dirs;
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	char     **lines;
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	gboolean   nextwd = FALSE;
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	gboolean   nextrtd = FALSE;
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	gboolean   havertd = FALSE;
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	guint      i;
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	guint      len;
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	dirs = g_ptr_array_sized_new(1);
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	lines = g_strsplit(output, "\n", 0);
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	len = g_strv_length(lines);
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	for (i = 0; i < len && lines[i]; i++) {
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		if (strlen(lines[i]) < 2)
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			continue;
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		if (!strcmp(lines[i], "fcwd")) {
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			nextwd = TRUE;
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			continue;
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		}
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		if (!strcmp(lines[i], "frtd")) {
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			nextrtd = TRUE;
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			continue;
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		}
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		if (!g_str_has_prefix(lines[i], "n"))
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			continue;
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		if (nextwd) {
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			g_ptr_array_add(dirs, g_strdup(lines[i] + 1));
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			nextwd = FALSE;
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		}
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		if (nextrtd && !havertd) {
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			g_strlcpy(buf->root, lines[i] + 1,
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				  sizeof(buf->root));
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			buf->flags |= (1 << GLIBTOP_PROC_WD_ROOT);
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			nextrtd = FALSE;
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			havertd = TRUE;
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		}
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	}
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	g_strfreev(lines);
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	return dirs;
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}
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#endif
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char**
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glibtop_get_proc_wd_s(glibtop *server, glibtop_proc_wd *buf, pid_t pid)
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{
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	int exe_mib[4];
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	size_t len;
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#if __FreeBSD_version > 800018 || (__FreeBSD_version < 800000 && __FreeBSD_version >= 700104)
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	struct kinfo_file *freep, *kif;
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	GPtrArray *dirs;
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#ifndef HAVE_KINFO_GETFILE
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	int name[4];
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#else
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	int cnt;
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#endif
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	int i;
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#else
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	char *output;
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#endif
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	memset (buf, 0, sizeof (glibtop_proc_wd));
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	len = 0;
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	exe_mib[0] = CTL_KERN;
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	exe_mib[1] = KERN_PROC;
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	exe_mib[2] = KERN_PROC_PATHNAME;
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	exe_mib[3] = pid;
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	if (sysctl(exe_mib, 4, NULL, &len, NULL, 0) == 0) {
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		if (len > sizeof(buf->exe))
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			len = sizeof(buf->exe);
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		if (sysctl(exe_mib, 4, buf->exe, &len, NULL, 0) == 0)
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			buf->flags |= (1 << GLIBTOP_PROC_WD_EXE);
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	}
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#if __FreeBSD_version > 800018 || (__FreeBSD_version < 800000 && __FreeBSD_version >= 700104)
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#ifndef HAVE_KINFO_GETFILE
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	len = 0;
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	name[0] = CTL_KERN;
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	name[1] = KERN_PROC;
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	name[2] = KERN_PROC_FILEDESC;
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	name[3] = pid;
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	if (sysctl(name, 4, NULL, &len, NULL, 0) < 0)
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		return NULL;
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	freep = kif = g_malloc(len);
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	if (sysctl(name, 4, kif, &len, NULL, 0) < 0) {
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		g_free(freep);
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		return NULL;
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	}
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#else
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	freep = kinfo_getfile(pid, &cnt);
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#endif
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	dirs = g_ptr_array_sized_new(1);
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#ifndef HAVE_KINFO_GETFILE
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	for (i = 0; i < len / sizeof(*kif); i++, kif++) {
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		if (kif->kf_structsize != sizeof(*kif))
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			continue;
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#else
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	for (i = 0; i < cnt; i++) {
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		kif = &freep[i];
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#endif
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		switch (kif->kf_fd) {
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			case KF_FD_TYPE_ROOT:
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				g_strlcpy(buf->root, kif->kf_path,
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					   sizeof(buf->root));
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				buf->flags |= (1 << GLIBTOP_PROC_WD_ROOT);
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				break;
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			case KF_FD_TYPE_CWD:
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				g_ptr_array_add(dirs, g_strdup (kif->kf_path));
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				break;
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		}
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	}
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	g_free(freep);
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	buf->number = dirs->len;
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	buf->flags |= (1 << GLIBTOP_PROC_WD_NUMBER);
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	g_ptr_array_add(dirs, NULL);
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	return (char **)g_ptr_array_free(dirs, FALSE);
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#else
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	output = execute_lsof(pid);
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	if (output != NULL) {
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		GPtrArray *dirs;
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		dirs = parse_output(output, buf);
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		g_free(output);
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		buf->number = dirs->len;
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		buf->flags |= (1 << GLIBTOP_PROC_WD_NUMBER);
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		g_ptr_array_add(dirs, NULL);
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		return (char **)g_ptr_array_free(dirs, FALSE);
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	}
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#endif
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	return NULL;
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}