staging: usbip: userspace: utils: remove libsysfs circumvention
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> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
matt mooney
Greg Kroah-Hartman
parent
4737d7e332
commit
42685d577f
@ -62,253 +62,3 @@ int modify_match_busid(char *busid, int add)
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return 0;
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}
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int read_integer(char *path)
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{
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char buff[100];
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int fd;
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int ret = 0;
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memset(buff, 0, sizeof(buff));
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fd = open(path, O_RDONLY);
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if (fd < 0)
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return -1;
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ret = read(fd, buff, sizeof(buff));
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if (ret < 0) {
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close(fd);
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return -1;
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}
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sscanf(buff, "%d", &ret);
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close(fd);
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return ret;
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}
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int read_string(char *path, char *string, size_t len)
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{
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int fd;
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int ret = 0;
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char *p;
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memset(string, 0, len);
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fd = open(path, O_RDONLY);
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if (fd < 0) {
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string = NULL;
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return -1;
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}
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ret = read(fd, string, len-1);
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if (ret < 0) {
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string = NULL;
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close(fd);
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return -1;
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}
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p = strchr(string, '\n');
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*p = '\0';
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close(fd);
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return 0;
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}
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int write_integer(char *path, int value)
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{
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int fd;
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int ret;
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char buff[100];
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snprintf(buff, sizeof(buff), "%d", value);
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fd = open(path, O_WRONLY);
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if (fd < 0)
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return -1;
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ret = write(fd, buff, strlen(buff));
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if (ret < 0) {
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close(fd);
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return -1;
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}
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close(fd);
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return 0;
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}
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int read_bConfigurationValue(char *busid)
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{
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char path[PATH_MAX];
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snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/bConfigurationValue", busid);
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return read_integer(path);
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}
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int write_bConfigurationValue(char *busid, int config)
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{
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char path[PATH_MAX];
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snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/bConfigurationValue", busid);
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return write_integer(path, config);
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}
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int read_bNumInterfaces(char *busid)
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{
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char path[PATH_MAX];
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snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/bNumInterfaces", busid);
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return read_integer(path);
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}
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int read_bDeviceClass(char *busid)
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{
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char path[PATH_MAX];
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snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/bDeviceClass", busid);
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return read_integer(path);
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}
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int getdriver(char *busid, int conf, int infnum, char *driver, size_t len)
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{
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char path[PATH_MAX];
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char linkto[PATH_MAX];
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const char none[] = "none";
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int ret;
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snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s:%d.%d/driver", busid, conf, infnum);
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/* readlink does not add NULL */
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memset(linkto, 0, sizeof(linkto));
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ret = readlink(path, linkto, sizeof(linkto)-1);
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if (ret < 0) {
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strncpy(driver, none, len);
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return -1;
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} else {
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strncpy(driver, basename(linkto), len);
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return 0;
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}
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}
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int getdevicename(char *busid, char *name, size_t len)
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{
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char path[PATH_MAX];
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char idProduct[10], idVendor[10];
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snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/idVendor", busid);
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read_string(path, idVendor, sizeof(idVendor));
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snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s/idProduct", busid);
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read_string(path, idProduct, sizeof(idProduct));
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if (!idVendor[0] || !idProduct[0])
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return -1;
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snprintf(name, len, "%s:%s", idVendor, idProduct);
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return 0;
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}
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#define MAXLINE 100
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/* if this cannot read a whole line, return -1 */
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int readline(int sockfd, char *buff, int bufflen)
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{
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int ret;
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char c;
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int index = 0;
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while (index < bufflen) {
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ret = read(sockfd, &c, sizeof(c));
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if (ret < 0 && errno == EINTR)
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continue;
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if (ret <= 0) {
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return -1;
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}
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buff[index] = c;
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if ( index > 0 && buff[index-1] == '\r' && buff[index] == '\n') {
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/* end of line */
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buff[index-1] = '\0'; /* get rid of delimitor */
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return index;
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} else
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index++;
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}
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return -1;
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}
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#if 0
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int writeline(int sockfd, char *str, int strlen)
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{
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int ret;
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int index = 0;
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int len;
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char buff[MAXLINE];
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if (strlen + 3 > MAXLINE)
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return -1;
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strncpy(buff, str, strlen);
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buff[strlen+1] = '\r';
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buff[strlen+2] = '\n';
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buff[strlen+3] = '\0';
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len = strlen + 3;
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while (len > 0) {
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ret = write(sockfd, buff+index, len);
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if (ret <= 0) {
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return -1;
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}
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len -= ret;
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index += ret;
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}
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return index;
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}
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#endif
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int writeline(int sockfd, char *str, int strlen)
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{
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int ret;
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int index = 0;
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int len;
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char buff[MAXLINE];
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len = strnlen(str, strlen);
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if (strlen + 2 > MAXLINE)
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return -1;
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memcpy(buff, str, strlen);
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buff[strlen] = '\r';
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buff[strlen+1] = '\n'; /* strlen+1 <= MAXLINE-1 */
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len = strlen + 2;
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while (len > 0) {
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ret = write(sockfd, buff+index, len);
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if (ret < 0 && errno == EINTR)
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continue;
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if (ret <= 0) {
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return -1;
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}
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len -= ret;
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index += ret;
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}
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return index;
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}
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@ -1,19 +1,24 @@
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/*
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* Copyright (C) 2011 matt mooney <mfm@muteddisk.com>
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* 2005-2007 Takahiro Hirofuchi
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __UTILS_H
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#define __UTILS_H
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#include <stdlib.h>
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int modify_match_busid(char *busid, int add);
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int read_string(char *path, char *, size_t len);
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int read_integer(char *path);
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int getdevicename(char *busid, char *name, size_t len);
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int getdriver(char *busid, int conf, int infnum, char *driver, size_t len);
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int read_bNumInterfaces(char *busid);
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int read_bConfigurationValue(char *busid);
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int write_integer(char *path, int value);
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int write_bConfigurationValue(char *busid, int config);
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int read_bDeviceClass(char *busid);
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int readline(int sockfd, char *str, int strlen);
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int writeline(int sockfd, char *buff, int bufflen);
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#endif /* __UTILS_H */
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