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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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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.h>
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#include <glibtop_private.h>
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#include <glibtop/procuid.h>
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#include <glibtop/error.h>
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#include <errno.h>
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#include "safeio.h"
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/*
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* The differences between old and new procfs API are:
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* - old has /proc/<pid> file and ioctl() is used to obtain the data.
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* - new has /proc/<pid>/* files and read() & friends are used to
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* obtain the data.
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* - names of structures and members are different. It's mostly the
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* prefix. Old uses `pr' and new uses `ps'.
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*
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* Since almost every line would be in #ifdef, I think it would
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* be more readable to just copy everything twice. This is not a big
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* file, after all.
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*/
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#ifdef HAVE_PROCFS_H
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/* Read /proc/<pid>/psinfo. */
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int
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glibtop_get_proc_data_psinfo_s (glibtop *server, struct psinfo *psinfo, pid_t pid)
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{
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int fd;
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char buffer [BUFSIZ];
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sprintf (buffer, "/proc/%d/psinfo", (int) pid);
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fd = s_open (buffer, O_RDONLY);
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if (fd < 0) {
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glibtop_warn_io_r (server, "open (%s)", buffer);
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return -1;
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}
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if (s_pread (fd, psinfo, sizeof (struct psinfo), 0)
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!= sizeof (struct psinfo))
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{
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s_close (fd);
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glibtop_warn_io_r (server, "pread (%s)", buffer);
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return -1;
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}
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s_close (fd);
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return 0;
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}
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int
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glibtop_get_proc_data_usage_s (glibtop *server, struct prusage *prusage, pid_t pid)
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{
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int fd;
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char buffer [BUFSIZ];
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sprintf (buffer, "/proc/%d/usage", (int) pid);
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fd = s_open (buffer, O_RDONLY);
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if (fd < 0) {
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glibtop_warn_io_r (server, "open (%s)", buffer);
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return -1;
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}
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if (s_pread (fd, prusage, sizeof (struct prusage), 0)
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!= sizeof (struct prusage))
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{
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s_close (fd);
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glibtop_warn_io_r (server, "pread (%s)", buffer);
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return -1;
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}
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s_close (fd);
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return 0;
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}
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#if LIBGTOP_VERSION_CODE >= 1001002
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int
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glibtop_get_proc_credentials_s(glibtop *server,
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struct prcred *prcred,
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gid_t *groups,
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pid_t pid)
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{
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int fd;
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size_t toread;
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char buffer[BUFSIZ];
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sprintf(buffer, "/proc/%d/cred", (int)pid);
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if((fd = s_open(buffer, O_RDONLY)) < 0)
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{
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if(errno != EPERM && errno != EACCES)
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glibtop_warn_io_r(server, "open (%s)", buffer);
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return -1;
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}
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if(s_pread(fd, prcred, sizeof(struct prcred), 0)
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!= sizeof(struct prcred))
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{
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s_close(fd);
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glibtop_warn_io_r(server, "pread (%s)", buffer);
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return -1;
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}
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if(prcred->pr_ngroups >= 0)
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{
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toread = MIN(prcred->pr_ngroups, GLIBTOP_MAX_GROUPS) * sizeof(gid_t);
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if((size_t) s_pread(fd,groups, toread,
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G_STRUCT_OFFSET(struct prcred, pr_groups))
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!= toread)
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prcred->pr_ngroups = 0;
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}
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s_close(fd);
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return 0;
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}
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#endif /* LIBGTOP_VERSION_CODE >= 1001002 */
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int
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glibtop_get_proc_status_s(glibtop *server, struct pstatus *pstatus, pid_t pid)
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{
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int fd;
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char buffer[BUFSIZ];
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sprintf(buffer, "/proc/%d/status", (int)pid);
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if((fd = s_open(buffer, O_RDONLY)) < 0)
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{
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if(errno != EPERM && errno != EACCES)
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glibtop_warn_io_r(server, "open (%s)", buffer);
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return -1;
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}
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if(s_pread(fd, pstatus, sizeof(struct pstatus), 0)
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!= sizeof(struct pstatus))
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{
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s_close(fd);
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glibtop_warn_io_r(server, "pread (%s)", buffer);
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return -1;
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}
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s_close(fd);
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return 0;
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}
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#else /* old API */
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int
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glibtop_get_proc_data_psinfo_s (glibtop *server,
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struct prpsinfo *psinfo,
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pid_t pid)
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{
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int fd;
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char buffer [BUFSIZ];
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sprintf (buffer, "/proc/%d", (int) pid);
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fd = s_open (buffer, O_RDONLY);
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if (fd < 0) {
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if(errno != EPERM && errno != EACCES)
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glibtop_warn_io_r (server, "open (%s)", buffer);
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return -1;
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}
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if(ioctl(fd, PIOCPSINFO, psinfo) < 0)
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{
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s_close (fd);
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glibtop_warn_io_r (server, "ioctl(%s, PIOCPSINFO)", buffer);
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return -1;
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}
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s_close (fd);
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return 0;
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}
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int
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glibtop_get_proc_data_usage_s (glibtop *server,
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struct prusage *prusage,
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pid_t pid)
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{
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int fd;
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char buffer [BUFSIZ];
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sprintf (buffer, "/proc/%d", (int) pid);
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fd = s_open (buffer, O_RDONLY);
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if (fd < 0) {
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if(errno != EPERM && errno != EACCES)
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glibtop_warn_io_r (server, "open (%s)", buffer);
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return -1;
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}
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if(ioctl(fd, PIOCUSAGE, prusage) < 0)
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{
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s_close (fd);
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glibtop_warn_io_r (server, "ioctl(%s, PIOCUSAGE)", buffer);
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return -1;
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}
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s_close (fd);
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return 0;
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}
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int
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glibtop_get_proc_credentials_s(glibtop *server,
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struct prcred *prcred,
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gid_t *groups,
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pid_t pid)
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{
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int fd;
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size_t toread;
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char buffer[BUFSIZ];
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sprintf(buffer, "/proc/%d", (int)pid);
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if((fd = s_open(buffer, O_RDONLY)) < 0)
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{
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if(errno != EPERM && errno != EACCES)
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glibtop_warn_io_r(server, "open (%s)", buffer);
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return -1;
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}
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if(ioctl(fd, PIOCCRED, prcred) < 0)
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{
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s_close(fd);
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glibtop_warn_io_r(server, "ioctl(%s, PIOCCRED)", buffer);
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return -1;
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}
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s_close(fd);
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return 0;
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}
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int
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glibtop_get_proc_status_s(glibtop *server, struct prstatus *pstatus, pid_t pid)
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{
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int fd;
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char buffer[BUFSIZ];
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sprintf(buffer, "/proc/%d", (int)pid);
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if((fd = s_open(buffer, O_RDONLY)) < 0)
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{
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if(errno != EPERM && errno != EACCES)
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glibtop_warn_io_r(server, "open (%s)", buffer);
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return -1;
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}
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if(ioctl(fd, PIOCSTATUS, pstatus) < 0)
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{
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s_close(fd);
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glibtop_warn_io_r(server, "ioctl(%s, PIOCSTATUS)", buffer);
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return -1;
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}
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s_close(fd);
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return 0;
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}
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#endif
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