24 lines
546 B
C
24 lines
546 B
C
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#include <fcntl.h>
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#include <linux/types.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <unistd.h>
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int main() {
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int dirfd;
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if ((dirfd = open("/tmp", __O_DIRECTORY)) < 0)
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perror("opendir");
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if (openat(dirfd, "filethatdoesexist", O_RDONLY) < 0)
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perror("openat0");
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if (chroot("/tmp"))
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perror("chroot");
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if (open("/etc/passwd", O_RDONLY) < 0)
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perror("open");
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if (openat(dirfd, "../etc/passwd", O_RDONLY) < 0)
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perror("openat1");
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if (openat(dirfd, "filethatdoesexist", O_RDONLY) < 0)
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perror("openat2");
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}
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