mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-13 20:12:26 +00:00
50570326d4
- `dep.c` and `dep2.c`: `debugfs_create_u32` does not return anymore, not sure why: https://unix.stackexchange.com/questions/593983/creating-a-debugfs-file-that-is-used-to-read-write-u32-value/621282#621282 So just doing `debugfs_lookup` for now - vermagic.c:51161bfc66prevents its usage in v5.8. Just migrating to `init_utsname` for now - procfs.c: `struct file_operations` moved to a new `struct proc_ops` at:b567e07513- myprintk.c: `pr_warning` dropped for `pr_warn`:61ff72f401- `poll.c`: `kthread_func` is not defined in kernel, prefix with lkmc to avoid conflict Fix https://github.com/cirosantilli/linux-kernel-module-cheat/issues/136 Fix https://github.com/cirosantilli/linux-kernel-module-cheat/issues/137
42 lines
833 B
C
42 lines
833 B
C
/* https://cirosantilli.com/linux-kernel-module-cheat#procfs */
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#include <linux/module.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h> /* seq_read, seq_lseek, single_open, single_release */
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#include <uapi/linux/stat.h> /* S_IRUSR */
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static const char *filename = "lkmc_procfs";
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static int show(struct seq_file *m, void *v)
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{
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seq_printf(m, "abcd\n");
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return 0;
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}
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static int open(struct inode *inode, struct file *file)
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{
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return single_open(file, show, NULL);
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}
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static const struct proc_ops pops = {
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.proc_lseek = seq_lseek,
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.proc_open = open,
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.proc_read = seq_read,
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.proc_release = single_release,
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};
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static int myinit(void)
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{
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proc_create(filename, 0, NULL, &pops);
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return 0;
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}
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static void myexit(void)
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{
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remove_proc_entry(filename, NULL);
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}
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module_init(myinit)
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module_exit(myexit)
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MODULE_LICENSE("GPL");
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