48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <sched.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 <sys/types.h>
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#include <unistd.h>
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int main(int argc, char** argv) {
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if (argc <= 2) {
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fprintf(stderr, "error: must provide a namespace file.\n");
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fprintf(stderr, "usage: %s <file> [arguments...]\n", argv[0]);
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return 1;
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}
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int fd = open(argv[1], O_RDONLY);
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if (fd < 0) {
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fprintf(stderr, "error opening %s: %s\n", argv[1], strerror(errno));
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return 1;
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}
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if (setns(fd, 0) < 0) {
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fprintf(stderr, "error joining %s: %s\n", argv[1], strerror(errno));
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return 1;
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}
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execvp(argv[2], &argv[2]);
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return 1;
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}
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