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Subject[PATCH 10/22] staging: usbip: userspace: utils: remove libsysfs circumvention
Date
Removes all of the helper functions that used a lot of hard-coded
values intead of libsysfs. Most of these functions were unused
anyway.

Signed-off-by: matt mooney <mfm@muteddisk.com>
---
drivers/staging/usbip/userspace/src/utils.c | 250 ---------------------------
drivers/staging/usbip/userspace/src/utils.h | 31 ++--
2 files changed, 18 insertions(+), 263 deletions(-)
diff --git a/drivers/staging/usbip/userspace/src/utils.c b/drivers/staging/usbip/userspace/src/utils.c
index 2a25cec..9b31c78 100644
--- a/drivers/staging/usbip/userspace/src/utils.c
+++ b/drivers/staging/usbip/userspace/src/utils.c
@@ -62,253 +62,3 @@ int modify_match_busid(char *busid, int add)

return 0;
}
-
-int read_integer(char *path)
-{
- char buff[100];
- int fd;
- int ret = 0;
-
- memset(buff, 0, sizeof(buff));
-
- fd = open(path, O_RDONLY);
- if (fd < 0)
- return -1;
-
- ret = read(fd, buff, sizeof(buff));
- if (ret < 0) {
- close(fd);
- return -1;
- }
-
- sscanf(buff, "%d", &ret);
-
- close(fd);
-
- return ret;
-}
-
-int read_string(char *path, char *string, size_t len)
-{
- int fd;
- int ret = 0;
- char *p;
-
- memset(string, 0, len);
-
- fd = open(path, O_RDONLY);
- if (fd < 0) {
- string = NULL;
- return -1;
- }
-
- ret = read(fd, string, len-1);
- if (ret < 0) {
- string = NULL;
- close(fd);
- return -1;
- }
-
- p = strchr(string, '\n');
- *p = '\0';
-
- close(fd);
-
- return 0;
-}
-
-int write_integer(char *path, int value)
-{
- int fd;
- int ret;
- char buff[100];
-
- snprintf(buff, sizeof(buff), "%d", value);
-
- fd = open(path, O_WRONLY);
- if (fd < 0)
- return -1;
-
- ret = write(fd, buff, strlen(buff));
- if (ret < 0) {
- close(fd);
- return -1;
- }
-
- close(fd);
-
- return 0;
-}
-
-int read_bConfigurationValue(char *busid)
-{
- char path[PATH_MAX];
-
- snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/bConfigurationValue", busid);
-
- return read_integer(path);
-}
-
-int write_bConfigurationValue(char *busid, int config)
-{
- char path[PATH_MAX];
-
- snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/bConfigurationValue", busid);
-
- return write_integer(path, config);
-}
-
-int read_bNumInterfaces(char *busid)
-{
- char path[PATH_MAX];
-
- snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/bNumInterfaces", busid);
-
- return read_integer(path);
-}
-
-int read_bDeviceClass(char *busid)
-{
- char path[PATH_MAX];
-
- snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/bDeviceClass", busid);
-
- return read_integer(path);
-}
-
-int getdriver(char *busid, int conf, int infnum, char *driver, size_t len)
-{
- char path[PATH_MAX];
- char linkto[PATH_MAX];
- const char none[] = "none";
- int ret;
-
- snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s:%d.%d/driver", busid, conf, infnum);
-
- /* readlink does not add NULL */
- memset(linkto, 0, sizeof(linkto));
- ret = readlink(path, linkto, sizeof(linkto)-1);
- if (ret < 0) {
- strncpy(driver, none, len);
- return -1;
- } else {
- strncpy(driver, basename(linkto), len);
- return 0;
- }
-}
-
-int getdevicename(char *busid, char *name, size_t len)
-{
- char path[PATH_MAX];
- char idProduct[10], idVendor[10];
-
- snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/idVendor", busid);
- read_string(path, idVendor, sizeof(idVendor));
-
- snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/idProduct", busid);
- read_string(path, idProduct, sizeof(idProduct));
-
- if (!idVendor[0] || !idProduct[0])
- return -1;
-
- snprintf(name, len, "%s:%s", idVendor, idProduct);
-
- return 0;
-}
-
-#define MAXLINE 100
-
-/* if this cannot read a whole line, return -1 */
-int readline(int sockfd, char *buff, int bufflen)
-{
- int ret;
- char c;
- int index = 0;
-
-
- while (index < bufflen) {
- ret = read(sockfd, &c, sizeof(c));
- if (ret < 0 && errno == EINTR)
- continue;
- if (ret <= 0) {
- return -1;
- }
-
- buff[index] = c;
-
- if ( index > 0 && buff[index-1] == '\r' && buff[index] == '\n') {
- /* end of line */
- buff[index-1] = '\0'; /* get rid of delimitor */
- return index;
- } else
- index++;
- }
-
- return -1;
-}
-
-#if 0
-int writeline(int sockfd, char *str, int strlen)
-{
- int ret;
- int index = 0;
- int len;
- char buff[MAXLINE];
-
- if (strlen + 3 > MAXLINE)
- return -1;
-
- strncpy(buff, str, strlen);
- buff[strlen+1] = '\r';
- buff[strlen+2] = '\n';
- buff[strlen+3] = '\0';
-
- len = strlen + 3;
-
- while (len > 0) {
- ret = write(sockfd, buff+index, len);
- if (ret <= 0) {
- return -1;
- }
-
- len -= ret;
- index += ret;
- }
-
- return index;
-}
-#endif
-
-int writeline(int sockfd, char *str, int strlen)
-{
- int ret;
- int index = 0;
- int len;
- char buff[MAXLINE];
-
- len = strnlen(str, strlen);
-
- if (strlen + 2 > MAXLINE)
- return -1;
-
- memcpy(buff, str, strlen);
- buff[strlen] = '\r';
- buff[strlen+1] = '\n'; /* strlen+1 <= MAXLINE-1 */
-
- len = strlen + 2;
-
- while (len > 0) {
- ret = write(sockfd, buff+index, len);
- if (ret < 0 && errno == EINTR)
- continue;
- if (ret <= 0) {
- return -1;
- }
-
- len -= ret;
- index += ret;
- }
-
- return index;
-}
-
diff --git a/drivers/staging/usbip/userspace/src/utils.h b/drivers/staging/usbip/userspace/src/utils.h
index b50e95a..fdcb14d 100644
--- a/drivers/staging/usbip/userspace/src/utils.h
+++ b/drivers/staging/usbip/userspace/src/utils.h
@@ -1,19 +1,24 @@
+/*
+ * Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
+ * 2005-2007 Takahiro Hirofuchi
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
#ifndef __UTILS_H
#define __UTILS_H

-#include <stdlib.h>
-
int modify_match_busid(char *busid, int add);
-int read_string(char *path, char *, size_t len);
-int read_integer(char *path);
-int getdevicename(char *busid, char *name, size_t len);
-int getdriver(char *busid, int conf, int infnum, char *driver, size_t len);
-int read_bNumInterfaces(char *busid);
-int read_bConfigurationValue(char *busid);
-int write_integer(char *path, int value);
-int write_bConfigurationValue(char *busid, int config);
-int read_bDeviceClass(char *busid);
-int readline(int sockfd, char *str, int strlen);
-int writeline(int sockfd, char *buff, int bufflen);

#endif /* __UTILS_H */
--
1.7.5.2


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