33 lines
679 B
C
33 lines
679 B
C
/* pivot_root.c - Change the root file system */
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/* Written 2000 by Werner Almesberger */
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#include <stdio.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#define pivot_root(new_root,put_old) syscall(SYS_pivot_root,new_root,put_old)
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#if 0
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/*
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* With kernelheaders 2.3.41 or later, and ancient libc, try the following.
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*/
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#include <errno.h>
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#include <linux/unistd.h>
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static
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_syscall2(int,pivot_root,const char *,new_root,const char *,put_old)
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#endif
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int main(int argc, const char **argv)
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{
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if (argc != 3) {
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fprintf(stderr, "usage: %s new_root put_old\n", argv[0]);
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return 1;
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}
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if (pivot_root(argv[1],argv[2]) < 0) {
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perror("pivot_root");
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return 1;
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}
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return 0;
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}
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