8fcfb01a81
The copyrights of the source files were all out of date and were not the same format. This has been corrected. The source of the authors was examining the git log for each file. Signed-off-by: Craig Small <csmall@dropbear.xyz>
117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/*
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* namespace.c - Library API for Linux namespaces
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*
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* Copyright © 2015-2023 Jim Warner <james.warner@comcast.net>
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* Copyright © 2015-2023 Craig Small <csmall@dropbear.xyz>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include "misc.h"
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#include "procps-private.h"
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#define NSPATHLEN 64
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static const char *ns_names[] = {
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[PROCPS_NS_CGROUP] = "cgroup",
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[PROCPS_NS_IPC] = "ipc",
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[PROCPS_NS_MNT] = "mnt",
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[PROCPS_NS_NET] = "net",
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[PROCPS_NS_PID] = "pid",
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[PROCPS_NS_TIME] = "time",
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[PROCPS_NS_USER] = "user",
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[PROCPS_NS_UTS] = "uts"
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};
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/*
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* procps_ns_get_name:
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*
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* Find the name of the namespace with the given ID
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*
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* @id: The ID of the required namespace, see
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* namespace_type
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*
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* Returns: static string of the namespace
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*/
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PROCPS_EXPORT const char *procps_ns_get_name(const int id)
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{
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if (id >= PROCPS_NS_COUNT || id < 0)
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return NULL;
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return ns_names[id];
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}
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/*
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* procps_ns_get_id:
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*
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* Find the namespace ID that matches the given
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* name.
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*
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* @name: the name of the required namespace
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*
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* Returns: ID of found name
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* < 0 means error
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*/
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PROCPS_EXPORT int procps_ns_get_id(const char *name)
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{
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int i;
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if (name == NULL)
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return -EINVAL;
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for (i=0; i < PROCPS_NS_COUNT; i++)
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if (!strcmp(ns_names[i], name))
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return i;
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return -EINVAL;
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}
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/*
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* procs_ns_read_pid:
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*
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* Find all namespaces for the given process.
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* @pid: Process ID for required process
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* @nsp: Pointer to the struct procps_ns
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*
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* Returns:
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* 0 on success
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* < 0 on error
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*/
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PROCPS_EXPORT int procps_ns_read_pid(
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const int pid,
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struct procps_ns *nsp)
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{
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char path[NSPATHLEN+1];
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struct stat st;
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int i;
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if (nsp == NULL)
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return -EINVAL;
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if (pid < 1)
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return -EINVAL;
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for (i=0; i < PROCPS_NS_COUNT; i++) {
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snprintf(path, NSPATHLEN, "/proc/%d/ns/%s", pid, ns_names[i]);
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if (0 == stat(path, &st))
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nsp->ns[i] = (unsigned long)st.st_ino;
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else
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nsp->ns[i] = 0;
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}
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return 0;
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}
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