- updated gettext BR

[packages/eject.git] / umount.patch

diff --git a/eject.c b/eject.c
index 4175756..057d2ea 100644
--- a/eject.c
+++ b/eject.c
@@ -42,6 +42,7 @@
 #include <string.h>
 #include <fcntl.h>
 #include <limits.h>
+#include <dirent.h>
 
 #ifdef GETOPTLONG
 #include <getopt.h>
@@ -1133,6 +1134,145 @@ static char *MultiplePartitions(const char *name)
 	return 0;
 }
 
+/*
+ * Find device name in /sys/block/. Returns NULL if not
+ * found. The returned pointer must be free()'d.
+ */
+static char* FindDeviceSysBlock(const char* deviceName)
+{
+	DIR *dir = opendir("/sys/block");
+	struct dirent *d;
+	const char *baseName = strrchr(deviceName, '/');
+	char *device;
+	int len;
+	
+	baseName = baseName ? baseName + 1 : deviceName;
+	if (!dir) {
+		fprintf(stderr, _("%s: can not open directory /sys/block/"), programName);
+		return NULL;
+	}
+	while ((d = readdir(dir)) != NULL) { 
+		if (d->d_type != DT_DIR && d->d_type != DT_LNK && d->d_type != DT_UNKNOWN)
+			continue;
+		len = strlen(d->d_name);
+		if (!strncmp(baseName, d->d_name, len)) {
+			if ((*(baseName+len) >= '0' &&
+			     *(baseName+len) <= '9') ||
+			     *(baseName+len) == '\0') {
+				device = strdup(d->d_name);
+				closedir(dir);
+				return device;
+			}
+		}
+	}
+	closedir(dir);
+	return NULL;
+}
+
+/*
+ * From given path gets a subsystem. Returns subsystem if any found
+ * otherwise returns NULL. Returned value must not be free()'d
+ */
+static char *GetSubSystem(const char *sysfspath)
+{
+	static char subsystem[PATH_MAX];
+	char link_subsystem[PATH_MAX];
+	struct stat buf;
+	char *pos;
+
+	snprintf(link_subsystem, sizeof(link_subsystem), "%s/subsystem", sysfspath);
+
+	if (lstat(link_subsystem, &buf) == -1)
+		return NULL;
+	if (!S_ISLNK(buf.st_mode))
+		return NULL;
+	if (readlink(link_subsystem, subsystem, sizeof(subsystem)) == -1)
+		return NULL;
+	if ((pos = strrchr(subsystem, '/')) == NULL)
+		return NULL;
+	strncpy(subsystem, pos+1, sizeof(subsystem));
+
+	return subsystem;
+}
+
+/*
+ * Check content of /sys/block/<dev>/removable. Returns 1 if the file 
+ * contains '1' otherwise returns 0.
+ */
+static int CheckRemovable(const char* deviceName)
+{
+	FILE *fp;
+	int removable = 0;
+	char *device;
+	char path[PATH_MAX];
+
+	if ((device = FindDeviceSysBlock(deviceName)) == NULL) {
+		fprintf(stderr,
+				_("%s: did not find a device %s in /sys/block/\n"),
+				programName, deviceName);
+		exit(1);
+	}
+	snprintf(path, sizeof(path), "/sys/block/%s/removable", device);
+	free(device);
+	if((fp = fopen(path, "r")) == NULL)
+		return removable;
+	if (fgetc(fp) == '1')
+		removable = 1;
+	
+	fclose(fp);
+	return removable;
+}
+
+/* Check if a device is on hotpluggable subsystem. Returns 1 if is
+ * otherwise returns 0.
+ */
+static int CheckHotpluggable(const char* deviceName)
+{
+	int hotpluggable = 0;
+	char *device;
+	char path[PATH_MAX];
+	char *device_chain;
+	struct stat buf;
+	char *subsystem;
+	char *pos;
+
+	if ((device = FindDeviceSysBlock(deviceName)) == NULL) {
+		fprintf(stderr, _("%s: did not find a device %s in /sys/block/\n"),
+				programName, deviceName);
+		exit(1);
+	}
+	snprintf(path, sizeof(path), "/sys/block/%s/device", device);
+	free(device);
+
+	if (lstat(path, &buf) == -1) 
+		return hotpluggable;
+	if (!S_ISLNK(buf.st_mode))
+		return hotpluggable;
+	if ((device_chain = SymLink(path)) == NULL) 
+		return hotpluggable;
+	while ( strncmp(device_chain, "", sizeof(device_chain) != 0)) {
+		subsystem = GetSubSystem(device_chain);
+		if (subsystem) {
+			/* as hotpluggable we assume devices on these buses  */
+			if (strncmp("usb", subsystem, sizeof("usb")) == 0 ||
+			    strncmp("ieee1394", subsystem, sizeof("ieee1394")) == 0 ||
+			    strncmp("pcmcia", subsystem, sizeof("pcmcia")) == 0 ||
+			    strncmp("mmc", subsystem, sizeof("mmc")) == 0 ||
+			    strncmp("ccw", subsystem, sizeof("ccw")) == 0) {
+				hotpluggable = 1;
+				break;
+			}
+		}
+		/* remove one member from devicechain */
+		pos = strrchr(device_chain, '/');
+		if (pos) 
+			pos[0] = '\0';
+		else
+			device_chain[0] = '\0';
+	}
+
+	return hotpluggable;
+}
 
 /* handle -x option */
 static void HandleXOption(char *deviceName)
@@ -1276,6 +1416,17 @@ int main(int argc, char **argv)
 		exit(0);
 	}
 
+	/* Check if device has removable flag*/
+	if (v_option)
+		printf(_("%s: checking if device \"%s\" has a removable or hotpluggable flag\n"),
+				programName, deviceName);
+	if (!CheckRemovable(deviceName) && !CheckHotpluggable(deviceName))
+	{
+		fprintf(stderr, _("%s: device \"%s\" doesn't have a removable or hotpluggable flag\n"),
+				programName, deviceName);
+		exit(1);		
+	}
+	
 	/* handle -i option */
 	if (i_option) {
 		fd = OpenDevice(deviceName);