eb6c7cd036
Hi, The following patch makes udev/udevstart be a common binary. First, doing this grows udev by a total of 1.8kB (ppc32, stripped) whereas udevstart by itself is 6.4kB. I know you mentioned being able to replace udevstart with a script, but at 1.8kB I don't think it'll be easy to beat this with size there. Next, the following are by-eye timings of before, after, and with devfs on a slow, but still usable embedded platform (config stripped down to more-or-less bare for ramdisk): -- Embedded Planet RPX LITE, 64Mhz MPC 823e -- devfs : 15.333s, 15.253s, 14.988s (15.191s avg) udev-pristine : 18.675s, 18.079s, 18.418s (18.390s avg) udev-multi : 14.587s, 14.747s, 14.868s (14.734s avg) The patch ends up being rather large to add this, as in doing so I ended up making all refs (that I hit..) to devpath/subsystem be marked as 'const'. Signed-off-by: Tom Rini <trini@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
/*
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* dev_d.c - dev.d/ multiplexer
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*
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* Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*/
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/*
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* This essentially emulates the following shell script logic in C:
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* DIR="/etc/dev.d"
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* export DEVNAME="whatever_dev_name_udev_just_gave"
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* for I in "${DIR}/$DEVNAME/"*.dev "${DIR}/$1/"*.dev "${DIR}/default/"*.dev ; do
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* if [ -f $I ]; then $I $1 ; fi
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* done
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* exit 1;
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include "udev.h"
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#include "udev_lib.h"
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#include "logging.h"
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#define DEVD_DIR "/etc/dev.d/"
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#define DEVD_SUFFIX ".dev"
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static int run_program(char *name)
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{
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pid_t pid;
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dbg("running %s", name);
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pid = fork();
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switch (pid) {
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case 0:
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/* child */
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execv(name, main_argv);
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dbg("exec of child failed");
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exit(1);
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case -1:
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dbg("fork of child failed");
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break;
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return -1;
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default:
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wait(NULL);
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}
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return 0;
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}
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/*
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* runs files in these directories in order:
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* <node name given by udev>/
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* subsystem/
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* default/
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*/
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void dev_d_send(struct udevice *dev, const char *subsystem, const char *devpath)
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{
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char dirname[256];
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char env_devname[NAME_SIZE];
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char *devname;
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char *temp;
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if (udev_dev_d == 0)
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return;
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if (dev->type == 'b' || dev->type == 'c') {
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strfieldcpy(env_devname, udev_root);
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strfieldcat(env_devname, dev->name);
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} else if (dev->type == 'n') {
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strfieldcpy(env_devname, dev->name);
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setenv("DEVPATH", devpath, 1);
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}
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setenv("DEVNAME", env_devname, 1);
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dbg("DEVNAME='%s'", env_devname);
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devname = strdup(dev->name);
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if (!devname) {
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dbg("out of memory");
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return;
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}
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/* Chop the device name up into pieces based on '/' */
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temp = strchr(devname, '/');
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while (temp != NULL) {
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*temp = 0x00;
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strcpy(dirname, DEVD_DIR);
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strfieldcat(dirname, devname);
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call_foreach_file(run_program, dirname, DEVD_SUFFIX);
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*temp = '/';
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++temp;
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temp = strchr(temp, '/');
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}
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strcpy(dirname, DEVD_DIR);
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strfieldcat(dirname, dev->name);
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call_foreach_file(run_program, dirname, DEVD_SUFFIX);
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strcpy(dirname, DEVD_DIR);
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strfieldcat(dirname, subsystem);
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call_foreach_file(run_program, dirname, DEVD_SUFFIX);
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strcpy(dirname, DEVD_DIR "default");
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call_foreach_file(run_program, dirname, DEVD_SUFFIX);
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}
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