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replace binary firmware helper with shell script

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This commit is contained in:
Kay Sievers 2006-05-28 10:23:32 +02:00
parent 5005ca5991
commit 1388c83011
3 changed files with 30 additions and 156 deletions
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17
extras/firmware/Makefile
View File

@ -1,14 +1,11 @@
# Makefile for udev extra invoked from the udev main Makefile
#
# Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
# Copyright (C) 2004-2006 Kay Sievers <kay.sievers@vrfy.org>
#
# Released under the GNU General Public License, version 2.
#
PROG = firmware_helper
OBJ =
HEADERS =
GEN_HEADERS =
PROG = firmware.sh
MAN_PAGES =
prefix =
@ -29,14 +26,6 @@ all: $(PROG) $(MAN_PAGES)
.PHONY: all
.DEFAULT: all
%.o: %.c $(GEN_HEADERS)
$(E) " CC " $@
$(Q) $(CC) -c $(CFLAGS) $< -o $@
$(PROG): %: $(HEADERS) %.o $(OBJS)
$(E) " LD " $@
$(Q) $(LD) $(LDFLAGS) $@.o $(OBJS) -o $@ $(LIBUDEV) $(LIB_OBJS)
# man pages
%.8: %.xml
$(E) " XMLTO " $@
@ -45,7 +34,6 @@ $(PROG): %: $(HEADERS) %.o $(OBJS)
clean:
$(E) " CLEAN "
$(Q) rm -f $(PROG) $(OBJS) $(GEN_HEADERS)
.PHONY: clean
install-bin: all
@ -67,3 +55,4 @@ uninstall-man:
install-config:
@echo "no config file to install"
.PHONY: install-config

27
extras/firmware/firmware.sh Executable file
View File

@ -0,0 +1,27 @@
#!/bin/sh -e
FIRMWARE_DIRS="/lib/firmware /usr/local/lib/firmware"
err() {
echo "$@" >&2
if [ -x /bin/logger ]; then
/bin/logger -t "${0##*/}[$$]" "$@"
fi
}
if [ ! -e /sys$DEVPATH/loading ]; then
err "udev firmware loader misses sysfs directory"
exit 1
fi
for DIR in $FIRMWARE_DIRS; do
[ -e "$DIR/$FIRMWARE" ] || continue
echo 1 > /sys/$DEVPATH/loading
cat "$DIR/$FIRMWARE" > /sys/$DEVPATH/data
echo 0 > /sys/$DEVPATH/loading
exit 0
done
echo -1 > /sys/$DEVPATH/loading
err "Cannot find firmware file '$FIRMWARE'"
exit 1

142
extras/firmware/firmware_helper.c
View File

@ -1,142 +0,0 @@
/*
* A simple firmware helper program.
*
* Copyright 2005 Red Hat, Inc.
*
* 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 version 2 of the License.
*/
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include <sys/stat.h>
#include "../../udev.h"
#define FIRMWARE_PATH "/lib/firmware"
#define PATH_SIZE 256
#ifdef USE_LOG
void log_message(int priority, const char *format, ...)
{
va_list args;
static int udev_log = -1;
if (udev_log == -1) {
const char *value;
value = getenv("UDEV_LOG");
if (value)
udev_log = log_priority(value);
else
udev_log = LOG_ERR;
}
if (priority > udev_log)
return;
va_start(args, format);
vsyslog(priority, format, args);
va_end(args);
}
#endif
/* Set the 'loading' attribute for a firmware device.
* 1 == currently loading
* 0 == done loading
* -1 == error
*/
static int set_loading(const char *device, int value) {
char loading_path[PATH_SIZE];
int rc;
FILE *f;
snprintf(loading_path, sizeof(loading_path), "/sys/%s/loading", device);
loading_path[sizeof(loading_path)-1] = '\0';
f = fopen(loading_path, "w");
if (!f)
return -1;
rc = fprintf(f, "%d", value);
fclose(f);
if (rc < 0)
return rc;
return 0;
}
int main(int argc, char **argv) {
char *devpath, *firmware, *action, *driver;
char fw_path[PATH_SIZE];
char data_path[PATH_SIZE];
int fw_fd;
char *fw_buffer;
size_t fw_buffer_size;
size_t count;
int rc = 0;
logging_init("firmware_helper");
driver = getenv("PHYSDEVDRIVER");
if (!driver)
driver = "(unknown)";
devpath = getenv("DEVPATH");
firmware = getenv("FIRMWARE");
action = getenv("ACTION");
if (!devpath || !firmware || !action || strcmp(action,"add") != 0) {
err("missing devpath, action or firmware");
exit(1);
}
dbg("try to load firmware '%s' for '%s'", firmware, devpath);
set_loading(devpath, 1);
snprintf(fw_path, sizeof(fw_path), "%s/%s", FIRMWARE_PATH, firmware);
fw_path[sizeof(fw_path)-1] = '\0';
if (file_map(fw_path, &fw_buffer, &fw_buffer_size) != 0 || fw_buffer_size == 0) {
err("could not load firmware '%s' for '%s'", fw_path, devpath);
fw_buffer = NULL;
goto out_err;
}
snprintf(data_path, sizeof(data_path), "/sys/%s/data", devpath);
data_path[sizeof(data_path)-1] = '\0';
fw_fd = open(data_path, O_RDWR);
if (fw_fd < 0) {
rc = errno;
goto out_err;
}
count = 0;
while (count < fw_buffer_size) {
ssize_t c;
c = write(fw_fd, fw_buffer+count, fw_buffer_size-count);
if (c <= 0) {
rc = errno;
close(fw_fd);
goto out_err;
}
count += c;
}
close(fw_fd);
file_unmap(fw_buffer, fw_buffer_size);
set_loading(devpath, 0);
info("loaded '%s' for device '%s'", fw_path, devpath);
logging_close();
return 0;
out_err:
if (fw_buffer)
file_unmap(fw_buffer, fw_buffer_size);
set_loading(devpath, -1);
err("error loading '%s' for device '%s' with driver '%s'", fw_path, devpath, driver);
logging_close();
return rc;
}