54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
/*
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* This file is part of Jehanne.
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*
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* Copyright (C) 2017 Giacomo Tesio <giacomo@tesio.it>
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*
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* This is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, version 3 of the License.
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*
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* Jehanne 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <u.h>
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#include <lib9.h>
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#include <envvars.h>
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void
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main(int argc, char *argv[])
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{
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int fd;
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char buf[256], *cmd, **args;
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sys_rfork(RFNAMEG);
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if(argc < 3){
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fprint(2, "usage: ns/clone pid cmd [args...]\n");
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exits("usage");
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}
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snprint(buf, sizeof(buf), "/proc/%s/ns", argv[1]);
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fd = sys_open(buf, OWRITE);
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if(fd < 0){
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print("cannot open %s\n", buf);
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exits("invalid target pid");
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}
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jehanne_write(fd, "clone", 6);
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sys_close(fd);
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cmd = strdup(argv[2]);
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args = &argv[2];
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if(cmd[0] == '/'
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||(cmd[0] == '.' && (cmd[1] == '/' || (cmd[1] == '.' && cmd[2] == '/')))){
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sys_exec(cmd, (const char**)args);
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sysfatal("exec %s failed: %r", cmd);
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}
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jehanne_pexec(cmd, args);
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sysfatal("exec %s failed: %r", cmd);
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}
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