127198fdd5
* Ignoring an ignore flag, yikes * Also replace skip_initramfs with want_initramfs Co-authored-by: Erfan Abdi <erfangplus@gmail.com> Change-Id: Ifdf726f128bc66bf860bbb71024f94f56879710f
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#ifdef CONFIG_INITRAMFS_IGNORE_SKIP_FLAG
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#include <asm/setup.h>
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#endif
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#ifdef CONFIG_INITRAMFS_IGNORE_SKIP_FLAG
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#define INITRAMFS_STR_FIND "skip_initramfs"
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#define INITRAMFS_STR_REPLACE "want_initramfs"
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#define INITRAMFS_STR_LEN (sizeof(INITRAMFS_STR_FIND) - 1)
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static char proc_command_line[COMMAND_LINE_SIZE];
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static void proc_command_line_init(void) {
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char *offset_addr;
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strcpy(proc_command_line, saved_command_line);
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offset_addr = strstr(proc_command_line, INITRAMFS_STR_FIND);
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if (!offset_addr)
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return;
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memcpy(offset_addr, INITRAMFS_STR_REPLACE, INITRAMFS_STR_LEN);
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}
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#endif
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static int cmdline_proc_show(struct seq_file *m, void *v)
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{
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#ifdef CONFIG_INITRAMFS_IGNORE_SKIP_FLAG
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seq_printf(m, "%s\n", proc_command_line);
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#else
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seq_printf(m, "%s\n", saved_command_line);
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#endif
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return 0;
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}
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static int cmdline_proc_open(struct inode *inode, struct file *file)
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{
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return single_open(file, cmdline_proc_show, NULL);
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}
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static const struct file_operations cmdline_proc_fops = {
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.open = cmdline_proc_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static int __init proc_cmdline_init(void)
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{
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#ifdef CONFIG_INITRAMFS_IGNORE_SKIP_FLAG
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proc_command_line_init();
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#endif
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proc_create("cmdline", 0, NULL, &cmdline_proc_fops);
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return 0;
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}
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fs_initcall(proc_cmdline_init);
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