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/* Copyright (C) 1998-99 Martin Baulig
This file is part of LibGTop 1.0.
Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
LibGTop is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
LibGTop is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with LibGTop; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <glibtop.h>
#include <glibtop_private.h>
#include <glibtop/procuid.h>
#include <glibtop/error.h>
#include <errno.h>
#include "safeio.h"
/*
* The differences between old and new procfs API are:
* - old has /proc/<pid> file and ioctl() is used to obtain the data.
* - new has /proc/<pid>/* files and read() & friends are used to
* obtain the data.
* - names of structures and members are different. It's mostly the
* prefix. Old uses `pr' and new uses `ps'.
*
* Since almost every line would be in #ifdef, I think it would
* be more readable to just copy everything twice. This is not a big
* file, after all.
*/
#ifdef HAVE_PROCFS_H
/* Read /proc/<pid>/psinfo. */
int
glibtop_get_proc_data_psinfo_s (glibtop *server, struct psinfo *psinfo, pid_t pid)
{
int fd;
char buffer [BUFSIZ];
sprintf (buffer, "/proc/%d/psinfo", (int) pid);
fd = s_open (buffer, O_RDONLY);
if (fd < 0) {
glibtop_warn_io_r (server, "open (%s)", buffer);
return -1;
}
if (s_pread (fd, psinfo, sizeof (struct psinfo), 0)
!= sizeof (struct psinfo))
{
s_close (fd);
glibtop_warn_io_r (server, "pread (%s)", buffer);
return -1;
}
s_close (fd);
return 0;
}
int
glibtop_get_proc_data_usage_s (glibtop *server, struct prusage *prusage, pid_t pid)
{
int fd;
char buffer [BUFSIZ];
sprintf (buffer, "/proc/%d/usage", (int) pid);
fd = s_open (buffer, O_RDONLY);
if (fd < 0) {
glibtop_warn_io_r (server, "open (%s)", buffer);
return -1;
}
if (s_pread (fd, prusage, sizeof (struct prusage), 0)
!= sizeof (struct prusage))
{
s_close (fd);
glibtop_warn_io_r (server, "pread (%s)", buffer);
return -1;
}
s_close (fd);
return 0;
}
#if LIBGTOP_VERSION_CODE >= 1001002
int
glibtop_get_proc_credentials_s(glibtop *server,
struct prcred *prcred,
gid_t *groups,
pid_t pid)
{
int fd;
size_t toread;
char buffer[BUFSIZ];
sprintf(buffer, "/proc/%d/cred", (int)pid);
if((fd = s_open(buffer, O_RDONLY)) < 0)
{
if(errno != EPERM && errno != EACCES)
glibtop_warn_io_r(server, "open (%s)", buffer);
return -1;
}
if(s_pread(fd, prcred, sizeof(struct prcred), 0)
!= sizeof(struct prcred))
{
s_close(fd);
glibtop_warn_io_r(server, "pread (%s)", buffer);
return -1;
}
if(prcred->pr_ngroups >= 0)
{
toread = MIN(prcred->pr_ngroups, GLIBTOP_MAX_GROUPS) * sizeof(gid_t);
if((size_t) s_pread(fd,groups, toread,
G_STRUCT_OFFSET(struct prcred, pr_groups))
!= toread)
prcred->pr_ngroups = 0;
}
s_close(fd);
return 0;
}
#endif /* LIBGTOP_VERSION_CODE >= 1001002 */
int
glibtop_get_proc_status_s(glibtop *server, struct pstatus *pstatus, pid_t pid)
{
int fd;
char buffer[BUFSIZ];
sprintf(buffer, "/proc/%d/status", (int)pid);
if((fd = s_open(buffer, O_RDONLY)) < 0)
{
if(errno != EPERM && errno != EACCES)
glibtop_warn_io_r(server, "open (%s)", buffer);
return -1;
}
if(s_pread(fd, pstatus, sizeof(struct pstatus), 0)
!= sizeof(struct pstatus))
{
s_close(fd);
glibtop_warn_io_r(server, "pread (%s)", buffer);
return -1;
}
s_close(fd);
return 0;
}
#else /* old API */
int
glibtop_get_proc_data_psinfo_s (glibtop *server,
struct prpsinfo *psinfo,
pid_t pid)
{
int fd;
char buffer [BUFSIZ];
sprintf (buffer, "/proc/%d", (int) pid);
fd = s_open (buffer, O_RDONLY);
if (fd < 0) {
if(errno != EPERM && errno != EACCES)
glibtop_warn_io_r (server, "open (%s)", buffer);
return -1;
}
if(ioctl(fd, PIOCPSINFO, psinfo) < 0)
{
s_close (fd);
glibtop_warn_io_r (server, "ioctl(%s, PIOCPSINFO)", buffer);
return -1;
}
s_close (fd);
return 0;
}
int
glibtop_get_proc_data_usage_s (glibtop *server,
struct prusage *prusage,
pid_t pid)
{
int fd;
char buffer [BUFSIZ];
sprintf (buffer, "/proc/%d", (int) pid);
fd = s_open (buffer, O_RDONLY);
if (fd < 0) {
if(errno != EPERM && errno != EACCES)
glibtop_warn_io_r (server, "open (%s)", buffer);
return -1;
}
if(ioctl(fd, PIOCUSAGE, prusage) < 0)
{
s_close (fd);
glibtop_warn_io_r (server, "ioctl(%s, PIOCUSAGE)", buffer);
return -1;
}
s_close (fd);
return 0;
}
int
glibtop_get_proc_credentials_s(glibtop *server,
struct prcred *prcred,
gid_t *groups,
pid_t pid)
{
int fd;
size_t toread;
char buffer[BUFSIZ];
sprintf(buffer, "/proc/%d", (int)pid);
if((fd = s_open(buffer, O_RDONLY)) < 0)
{
if(errno != EPERM && errno != EACCES)
glibtop_warn_io_r(server, "open (%s)", buffer);
return -1;
}
if(ioctl(fd, PIOCCRED, prcred) < 0)
{
s_close(fd);
glibtop_warn_io_r(server, "ioctl(%s, PIOCCRED)", buffer);
return -1;
}
s_close(fd);
return 0;
}
int
glibtop_get_proc_status_s(glibtop *server, struct prstatus *pstatus, pid_t pid)
{
int fd;
char buffer[BUFSIZ];
sprintf(buffer, "/proc/%d", (int)pid);
if((fd = s_open(buffer, O_RDONLY)) < 0)
{
if(errno != EPERM && errno != EACCES)
glibtop_warn_io_r(server, "open (%s)", buffer);
return -1;
}
if(ioctl(fd, PIOCSTATUS, pstatus) < 0)
{
s_close(fd);
glibtop_warn_io_r(server, "ioctl(%s, PIOCSTATUS)", buffer);
return -1;
}
s_close(fd);
return 0;
}
#endif
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