mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-22 17:55:57 +01:00
56738a1c70
Unsquashed version at v2-rc-unsquashed, but that cannot be merged as it breaks bisects at several points. All bugs will not bisect to this humongous change. It all started with a conversion of the Bash scripts to Python, mainly because I couldn't stand not being able to properly use --options for run which has a million options. Then since that required a full testing, I decided to do all the refactorings that I had in mind at once, and so I did and it became v2-rc. This is the largest patch I have ever done! OMG a few weeks of extra time. I'm never writing a Bash script for anything that starts getting big again. Some of the features are: * separate build-qemu and build-gem5 commands * common: convert scripts to python. Add --option for everything * rename build to build-buildroot now that we are splitting all the build commands, Linux kernel to follow * move all git submodules to submodules/ and all buildroot packages to packages/ * refactor the out/ structure. Keep projects on toplevel, because guest projects separate archs and host ones don't, making a toplevel arch wrong * do-release: rename to just release https://stackoverflow.com/questions/16174992/cant-get-argparse-to-read-quoted-string-with-dashes-in-it * run: add --terminal and explain gem5 pdb * just track the lvimrc * store CLI kernel config fragment inside buildlroot to avoid conflicts * gem5: document m5 initparam * readme: make a bunch of things awesomer * readme: fix broken refs * parsec-benchmark: update to 75d55ac446a43c47efb1044844a108c6c330184c Could not fetch otherwise. * gem5: M5_OVERRIDE_PY_SOURCE
47 lines
1009 B
C
47 lines
1009 B
C
/* https://github.com/cirosantilli/linux-kernel-module-cheat#anonymous-inode */
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#define _GNU_SOURCE
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h> /* sleep */
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#include "../anonymous_inode.h"
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int main(int argc, char **argv)
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{
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char buf[1024];
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int fd_ioctl, fd_ioctl_anon, ret;
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size_t i, nreads;
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if (argc < 2) {
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puts("Usage: ./prog <ioctl-file> [<nreads>]");
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return EXIT_FAILURE;
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} else if (argc > 2) {
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nreads = strtol(argv[2], NULL, 10);
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} else {
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nreads = 3;
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}
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fd_ioctl = open(argv[1], O_RDONLY);
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if (fd_ioctl == -1) {
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perror("open");
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return EXIT_FAILURE;
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}
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ret = ioctl(fd_ioctl, LKMC_ANONYMOUS_INODE_GET_FD, &fd_ioctl_anon);
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if (ret == -1) {
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perror("ioctl");
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return EXIT_FAILURE;
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}
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for (i = 0; i < nreads; ++i) {
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ret = read(fd_ioctl_anon, buf, sizeof(buf));
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printf("%.*s\n", ret, buf);
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}
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close(fd_ioctl_anon);
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close(fd_ioctl);
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return EXIT_SUCCESS;
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}
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