devps.patch.9_25_2000

手机嵌入式Linux下可用的busybox源码

+	if (ioctl (fd, DEVMTAB_GET_MOUNTS, mntentlist)<0) {
+		fprintf (stderr, "\nDEVMTAB_GET_MOUNTS: %s\n", 
+			strerror (errno));
+		exit (1);
+	} 
+
+	fprintf( stdout, "\nEquivalent of /proc/mounts:\n");
+	for( i = 0 ; i < numfilesystems ; i++) {
+		fprintf( stdout, "%s %s %s %s %d %d\n", mntentlist[i].mnt_fsname,
+				mntentlist[i].mnt_dir, mntentlist[i].mnt_type, 
+				mntentlist[i].mnt_opts, mntentlist[i].mnt_freq, 
+				mntentlist[i].mnt_passno);
+	}
+
+
+	/* clean up */
+	free( fslist);
+	free( mntentlist);
+	if (close (fd) != 0) {
+		fprintf (stderr, "close failed for `%s': %s\n",
+			 device, strerror (errno));
+		exit (1);
+	}
+ 
+	exit (0);
+}
+
diff -urN --exclude=.version --exclude=.config* --exclude=.*depend linux-2.2.18-9.virgin/drivers/char/ps-devps.c linux/drivers/char/ps-devps.c
--- linux-2.2.18-9.virgin/drivers/char/ps-devps.c	Wed Dec 31 17:00:00 1969
+++ linux/drivers/char/ps-devps.c	Mon Sep 25 17:32:19 2000
@@ -0,0 +1,148 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini ps implementation for use with the Linux devps driver
+ *
+ *
+ * Copyright (C) 2000 by Erik Andersen <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/devps.h>
+#include <pwd.h>
+#include <grp.h>
+#include <sys/types.h>
+
+
+#define MAX_COLUMN	79
+
+int
+main (int argc, char **argv)
+{
+	char device[80] = "/dev/ps";
+	int i, j, len;
+	int fd;           /* file descriptor for devps device */
+	int status;       /* return status for system calls */
+	pid_t num_pids;
+	pid_t* pid_array = NULL;
+	struct pid_info info;
+	struct passwd *pwd;
+	struct group *grp;
+	char uidName[10] = "";
+	char groupName[10] = "";
+
+	if (argc > 1 && **(argv + 1) == '-') {
+		fprintf(stderr, "Usage: ps-devps\n\nReport process status\n\nThis version of ps accepts no options.\n\n");
+		exit(1);
+	}
+
+	/* open device */ 
+	//fd = open(device, O_RDWR);
+	fd = open(device, O_RDONLY);
+	if (fd < 0) {
+		fprintf (stderr, "open failed for `%s': %s\n",
+			 device, strerror (errno));
+		goto error;
+	}
+
+	/* Find out how many processes there are */
+	status = ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids);
+	if (status<0) {
+		fprintf (stderr, "\nDEVPS_GET_PID_LIST: %s\n", 
+			strerror (errno));
+		goto error;
+	} 
+	
+	/* Allocate some memory -- grab a few extras just in case 
+	 * some new processes start up while we wait. The kernel will
+	 * just ignore any extras if we give it too many, and will trunc.
+	 * the list if we give it too few.  */
+	pid_array = (pid_t*) calloc( num_pids+10, sizeof(pid_t));
+	pid_array[0] = num_pids+10;
+
+	/* Now grab the pid list */
+	status = ioctl (fd, DEVPS_GET_PID_LIST, pid_array);
+	if (status<0) {
+		fprintf (stderr, "\nDEVPS_GET_PID_LIST: %s\n", 
+			strerror (errno));
+		goto error;
+	} 
+
+	/* Print up a ps listing */
+	fprintf(stdout, "%5s  %-8s %-3s %5s %s\n", "PID", "Uid", "Gid",
+			"State", "Command");
+
+	for (i=1; i<pid_array[0] ; i++) {
+	    info.pid = pid_array[i];
+	    status = ioctl (fd, DEVPS_GET_PID_INFO, &info);
+	    if (status<0) {
+		    fprintf (stderr, "\nDEVPS_GET_PID_INFO: %s\n", 
+			    strerror (errno));
+		    goto error;
+	    } 
+		/* Make some adjustments as needed */
+		pwd = getpwuid(info.euid);
+		if (pwd == NULL)
+			sprintf(uidName, "%lu", info.euid);
+		else
+			sprintf(uidName, "%s", pwd->pw_name);
+		grp = getgrgid(info.egid);
+		if (grp == NULL)
+			sprintf(groupName, "%lu", info.egid);
+		else
+			sprintf(groupName, "%s", grp->gr_name);
+
+		len = fprintf(stdout, "%5d %-8s %-8s %c ", info.pid, uidName, groupName, info.state);
+
+		if (strlen(info.command_line) > 1) {
+			for( j=0; j<(sizeof(info.command_line)-1) && j < (MAX_COLUMN-len); j++) {
+				if (*(info.command_line+j) == '\0' && *(info.command_line+j+1) != '\0') {
+					*(info.command_line+j) = ' ';
+				}
+			}
+			*(info.command_line+j) = '\0';
+			fprintf(stdout, "%s\n", info.command_line);
+		} else {
+			fprintf(stdout, "[%s]\n", info.name);
+		}
+	}
+
+	/* Free memory */
+	free( pid_array);
+
+	/* close device */
+	status = close (fd);
+	if (status != 0) {
+		fprintf (stderr, "close failed for `%s': %s\n",
+			 device, strerror (errno));
+		goto error;
+	}
+ 
+	exit (0);
+error:
+	fflush(stdout);
+	fflush(stderr);
+	exit (1);
+}
+
diff -urN --exclude=.version --exclude=.config* --exclude=.*depend linux-2.2.18-9.virgin/fs/Makefile linux/fs/Makefile
--- linux-2.2.18-9.virgin/fs/Makefile	Wed Aug 25 18:29:49 1999
+++ linux/fs/Makefile	Mon Sep 25 16:33:16 2000
@@ -11,9 +11,10 @@
 L_OBJS    = $(join $(SUB_DIRS),$(SUB_DIRS:%=/%.o))
 O_TARGET := fs.o
 O_OBJS    = open.o read_write.o devices.o file_table.o buffer.o \
-		super.o  block_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
+		block_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
 		ioctl.o readdir.o select.o fifo.o locks.o filesystems.o \
 		dcache.o inode.o attr.o bad_inode.o file.o $(BINFMTS) 
+OX_OBJS = super.o
 
 MOD_LIST_NAME := FS_MODULES
 ALL_SUB_DIRS = coda minix ext2 fat msdos vfat proc isofs nfs umsdos ntfs \
diff -urN --exclude=.version --exclude=.config* --exclude=.*depend linux-2.2.18-9.virgin/fs/super.c linux/fs/super.c
--- linux-2.2.18-9.virgin/fs/super.c	Mon Sep 18 15:02:34 2000
+++ linux/fs/super.c	Mon Sep 25 17:00:57 2000
@@ -18,6 +18,7 @@
  */
 
 #include <linux/config.h>
+#include <linux/module.h>
 #include <linux/malloc.h>
 #include <linux/locks.h>
 #include <linux/smp_lock.h>
@@ -25,6 +26,7 @@
 #include <linux/init.h>
 #include <linux/quotaops.h>
 #include <linux/acct.h>
+#include <linux/devmtab.h>
 
 #include <asm/uaccess.h>
 
@@ -311,7 +313,57 @@
 	{ 0, NULL }
 };
 
-int get_filesystem_info( char *buf )
+
+extern int count_mounted_filesystems()
+{
+	struct vfsmount *tmp = vfsmntlist;
+	int count = 0;
+
+	while (tmp)
+	{
+		tmp = tmp->mnt_next;
+		count++;
+	}
+
+	return count;
+}
+EXPORT_SYMBOL(count_mounted_filesystems);
+
+
+extern void get_mtab_entries( int count, struct k_mntent* mntentlist)
+{
+	struct vfsmount *tmp = vfsmntlist;
+	struct proc_fs_info *fs_infop;
+	int i = 0, len;
+
+	while (tmp && i < count)
+	{
+		strncpy(mntentlist[i].mnt_fsname, tmp->mnt_devname, 
+				sizeof(mntentlist[i].mnt_fsname));
+		strncpy(mntentlist[i].mnt_dir, tmp->mnt_dirname, 
+				sizeof(mntentlist[i].mnt_dir));
+		strncpy(mntentlist[i].mnt_type, tmp->mnt_sb->s_type->name,
+				sizeof(mntentlist[i].mnt_type));
+		len = 0;
+		len+=sprintf(mntentlist[i].mnt_opts, "%s", 
+				tmp->mnt_flags & MS_RDONLY ? "ro" : "rw");
+		for (fs_infop = fs_info; fs_infop->flag; fs_infop++) {
+		  if (tmp->mnt_flags & fs_infop->flag) {
+		    strncpy(mntentlist[i].mnt_opts+len, fs_infop->str, 
+				    sizeof(mntentlist[i].mnt_opts)-len);
+		    len += strlen(fs_infop->str);
+		  }
+		}
+
+		/* TODO -- add in NFS stuff */ 
+
+		tmp = tmp->mnt_next;
+		i++;
+	}
+}
+EXPORT_SYMBOL(get_mtab_entries);
+
+extern int get_filesystem_info( char *buf )
 {
 	struct vfsmount *tmp = vfsmntlist;
 	struct proc_fs_info *fs_infop;
@@ -383,8 +435,37 @@
 
 	return len;
 }
+EXPORT_SYMBOL(get_filesystem_info);
+
+extern int count_kfstypes()
+{
+	struct file_system_type * tmp = file_systems;
+	int count = 0;
+
+	while (tmp) {
+		count++;
+		tmp = tmp->next;
+	}
+
+	return count;
+}
+EXPORT_SYMBOL(count_kfstypes);
+
+extern void get_kfstype_list(int count, struct k_fstype* fstypelist)
+{
+	int i = 0;
+	struct file_system_type * tmp = file_systems;
+
+	while (tmp && i < count) {
+		strncpy(fstypelist[i].mnt_type, tmp->name, sizeof(fstypelist[i].mnt_type));
+		fstypelist[i].mnt_nodev = (tmp->fs_flags & FS_REQUIRES_DEV)? 0 : 1;
+		tmp = tmp->next;
+		i++;
+	}
+}
+EXPORT_SYMBOL(get_kfstype_list);
 
-int get_filesystem_list(char * buf)
+extern int get_filesystem_list(char * buf)
 {
 	int len = 0;
 	struct file_system_type * tmp;
@@ -398,6 +479,7 @@
 	}
 	return len;
 }
+EXPORT_SYMBOL(get_filesystem_list);
 
 struct file_system_type *get_fs_type(const char *name)
 {
diff -urN --exclude=.version --exclude=.config* --exclude=.*depend linux-2.2.18-9.virgin/include/linux/devmtab.h linux/include/linux/devmtab.h
--- linux-2.2.18-9.virgin/include/linux/devmtab.h	Wed Dec 31 17:00:00 1969
+++ linux/include/linux/devmtab.h	Mon Sep 25 17:00:57 2000
@@ -0,0 +1,55 @@
+/* vi: set sw=8 ts=8: */
+/*
+ * -- <linux/devmtab.h>
+ *  
+ * Copyright (C) 2000 Erik Andersen <[e-mail]>
+ * 
+ * May be copied or modified under the terms of the GNU General Public License.
+ * See linux/COPYING for more information.
+ *
+ * This driver implements an interface whereby programs such as mount(8),
+ * umount(8), and df(1) may obtain all the process information they need to do
+ * their jobs without needing to use /proc.
+ *
+ */
+ 
+#ifndef	_LINUX_DEVMTAB_H
+#define	_LINUX_DEVMTAB_H
+
+
+/*******************************************************
+ * The list of all ioctl(2) commands suported by devmtab.
+ * For the devmtab ioctls, I have commandeered some of the
+ * higher bits of byte 0xeb.
+ *******************************************************/
+#define DEVMTAB_COUNT_FILESYSTEMS  0xebaa /* Get a list of all fs */ 
+#define DEVMTAB_GET_FILESYSTEMS    0xebab /* Get a list of all fs */ 
+#define DEVMTAB_COUNT_MOUNTS       0xebac /* Returns number of mounted filesystems */
+#define DEVMTAB_GET_MOUNTS         0xebad /* Get a list of a mounted fs */
+#define DEVMTAB_SET_ROOTFS_DEVNAME 0xebae /* Replace /dev/root with real name */
+
+/*******************************************************
+ * devmtab ioctl(2) structures
+ *******************************************************/
+
+/* An array of these is returned by the DEVMTAB_GET_FILESYSTEMS ioctl.
+ */
+struct k_fstype {
+	char    mnt_type[255];   /* filesystem type: ext2, nfs, etc. */
+	int     mnt_nodev;       /* Is this a device-less filesystem? */
+};
+
+/* An array of these is returned by the DEVMTAB_GET_MOUNTS ioctl.
+ * This struct should be the same as what libc returns via the
+ * getmntent(3) function (excat this comes from the kernel, not
+ * from whatever noise is in /etc/mtab at the moment... */
+struct k_mntent {
+	char    mnt_fsname[255];    /* name of mounted file system */
+	char    mnt_dir[255];       /* path of file system mount point */
+	char    mnt_type[255];      /* filesystem type: ext2, nfs, etc. */
+	char    mnt_opts[255];      /* Comma-separated list of mount options */
+	int     mnt_freq;       /* dump frequency in days */
+	int     mnt_passno;     /* pass number for parallel fsck */
+};
+
+#endif  /* _LINUX_DEVMTAB_H */
diff -urN --exclude=.version --exclude=.config* --exclude=.*depend linux-2.2.18-9.virgin/include/linux/devps.h linux/include/linux/devps.h
--- linux-2.2.18-9.virgin/include/linux/devps.h	Wed Dec 31 17:00:00 1969
+++ linux/include/linux/devps.h	Mon Sep 25 17:00:57 2000
@@ -0,0 +1,78 @@
+/*
+ * -- <linux/devps.h>
+ *  
+ * Copyright (C) 2000 Erik Andersen <[e-mail]>
+ * 
+ * May be copied or modified under the terms of the GNU General Public License.
+ * See linux/COPYING for more information.
+ *
+ * This driver implements an interface whereby programs such as ps(1), top(1),
+ * killall(1) and the like may obtain all the process information they need to
+ * do their jobs.
+ *
+ */
+ 
+#ifndef	_LINUX_DEVPS_H
+#define	_LINUX_DEVPS_H
+
+
+/*******************************************************
+ * The list of all ioctl(2) commands suported by devps.
+ * For the devps ioctls, I have commandeered some of the
+ * higher bits of byte 0xeb.
+ *******************************************************/
+#define DEVPS_GET_NUM_PIDS	0xeba1 /* Get a list of all PIDs */ 
+#define DEVPS_GET_PID_LIST	0xeba2 /* Get a list of all PIDs */ 
+#define DEVPS_GET_PID_INFO	0xeba3 /* Get info about a specific PID */
+#define DEVPS_GET_CURRENT_PID	0xeba4 /* Get the current PID */
+
+/*******************************************************
+ * devps ioctl(2) structures
+ *******************************************************/
+
+
+struct pid_info
+{
+	char  name[16];
+	long flags;
+	pid_t pgrp;
+	clock_t tms_cutime;
+	clock_t tms_cstime;
+	clock_t tms_utime;
+	clock_t tms_stime;
+	unsigned long min_flt;
+	unsigned long cmin_flt;
+	unsigned long maj_flt;
+	unsigned long cmaj_flt;
+	pid_t session;
+	pid_t pid;
+	pid_t ppid;
+	int tty;
+	unsigned long start_time;
+	unsigned long uid,euid,suid,fsuid;
+	unsigned long gid,egid,sgid,fsgid;
+	long priority, nice;
+	char state;
+	int processor;
+	unsigned long nswap, cnswap;
+	char command_line[256];
+	char environment[256];
+	char root[256];
+	char cwd[256];
+#if 0
+	/* TODO: Add in this (and probably more) stuff */
+
+	int resident;
+	int size;
+	int share;
+	unsigned long vsize;
+	char exe[MAX_PATH];
+	unsigned long vm_total, vm_locked, vm_rss, vm_data, vm_stack, vm_exec, vm_lib;
+	unsigned long start_code, end_code, start_data, eip, esp;
+	unsigned long signal, blocked;
+#endif
+
+
+};
+
+#endif  /* _LINUX_DEVPS_H */
diff -urN --exclude=.version --exclude=.config* --exclude=.*depend linux-2.2.18-9.virgin/include/linux/fs.h linux/include/linux/fs.h
--- linux-2.2.18-9.virgin/include/linux/fs.h	Mon Sep 18 15:08:47 2000
+++ linux/include/linux/fs.h	Mon Sep 25 17:37:50 2000
@@ -573,6 +573,16 @@
 	struct semaphore s_vfs_rename_sem;	/* Kludge */
 };
 
+/* fs/super.c */
+#include <linux/devmtab.h>
+
+extern int count_kfstypes( void);
+extern void get_kfstype_list( int count, struct k_fstype* fstypelist); 
+extern int count_mounted_filesystems( void);
+extern int get_filesystem_info(char *buf);
+extern int get_filesystem_list(char *buf);
+extern void get_mtab_entries( int count, struct k_mntent* mntentlist);
+
 /*
  * VFS helper functions..
  */
diff -urN --exclude=.version --exclude=.config* --exclude=.*depend linux-2.2.18-9.virgin/include/linux/miscdevice.h linux/include/linux/miscdevice.h
--- linux-2.2.18-9.virgin/include/linux/miscdevice.h	Mon Aug  9 13:04:41 1999
+++ linux/include/linux/miscdevice.h	Mon Sep 25 16:33:17 2000
@@ -11,6 +11,8 @@
 #define APOLLO_MOUSE_MINOR 7
 #define PC110PAD_MINOR 9
 #define MAC_MOUSE_MINOR 10
+#define DEVPS_MINOR		21
+#define DEVMTAB_MINOR		22
 #define WATCHDOG_MINOR		130	/* Watchdog timer     */
 #define TEMP_MINOR		131	/* Temperature Sensor */
 #define RTC_MINOR 135