1 files changed, 255 insertions, 0 deletions
diff --git a/drivers/staging/usbip/userspace/src/utils.c b/drivers/staging/usbip/userspace/src/utils.c
new file mode 100644
index 000000000000..8f441089b645
--- /dev/null
+++ b/drivers/staging/usbip/userspace/src/utils.c
@@ -0,0 +1,255 @@
+/*
+ *
+ * Copyright (C) 2005-2007 Takahiro Hirofuchi
+ */
+
+#include "utils.h"
+
+int read_integer(char *path)
+{
+	char buff[100];
+	int fd;
+	int ret = 0;
+
+	bzero(buff, 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;
+
+	bzero(string, 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];
+	int ret;
+
+	snprintf(path, PATH_MAX, "/sys/bus/usb/devices/%s:%d.%d/driver", busid, conf, infnum);
+
+	/* readlink does not add NULL */
+	bzero(linkto, 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;
+}
+