First revision

libemile/emile_scsi_get_dev.c

@@ -0,0 +1,46 @@
+static __attribute__((used)) char* rcsid = "$CVSHeader$";
+/*
+ *
+ * (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
+ *
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include "libemile.h"
+
+#define MAJOR_SD	8	/* SCSI disks */
+
+int emile_scsi_get_dev(char* dev_name, int fd)
+{
+	struct stat st;
+	int ret;
+	int dev;
+	int major;
+	int minor;
+
+	ret = fstat(fd, &st);
+	if (ret == -1)
+		return -1;
+
+	dev = S_ISREG(st.st_mode) ? st.st_dev : st.st_rdev;
+
+	major = (dev >> 8) & 0x0F;	/* major number = driver id */
+	minor = dev & 0xFF;		/* minor number = disk id */
+
+	switch(major)
+	{
+	case MAJOR_SD:	/* SCSI disks */
+		sprintf(dev_name, "/dev/sd%c%d", 'a' + (minor >> 4),
+				minor & 0x0F);
+		break;
+	default:
+		fprintf(stderr, "Unknown device major number %d\n", major);
+		return -1;
+	}
+
+	return 0;
+}

libemile/emile_scsi_get_rdev.c

@@ -0,0 +1,35 @@
+static __attribute__((used)) char* rcsid = "$CVSHeader$";
+/*
+ *
+ * (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
+ *
+ */
+
+#include "partition.h"
+#include "libemile.h"
+
+#define MAJOR_SD	8
+
+int emile_scsi_get_rdev(char* dev_name, int *disk, int *partition)
+{
+	int ret;
+	struct stat st;
+	int major;
+
+	ret = stat(dev_name, &st);
+	if (ret == -1)
+		return -1;
+
+	if (!S_ISBLK(st.st_mode))
+		/*  not a block device */
+		return -1;
+
+	major = (st.st_rdev >> 8) & 0x0F;
+	if (major != MAJOR_SD)
+		return -1;
+
+	*disk = (st.st_rdev & 0xFF) >> 4;
+	*partition = st.st_rdev &  0x0F;
+
+	return disk;
+}

tools/emile-set-startup.c

@@ -0,0 +1,49 @@
+/*
+ *
+ * (c) 2004 Laurent Vivier <LaurentVivier@wanadoo.fr>
+ *
+ */
+
+#include <stdio.h>
+
+#include "libemile.h"
+
+static void usage(int argc, char** argv)
+{
+	fprintf(stderr, "Usage: %s <partition>\n", argv[0]);
+	fprintf(stderr, "\n     Set startup partition\n");
+	fprintf(stderr, "\nbuild: \n%s\n", SIGNATURE);
+}
+
+int main(int argc, char** argv)
+{
+	int ret;
+	int disk;
+	int partition;
+	char disk_name[16];
+
+	if (argc != 2)
+	{
+		usage(argc, argv);
+		return 1;
+	}
+
+	ret = emile_scsi_get_rdev(argv[1], &disk, &partition);
+	if (ret == -1)
+	{
+		fprintf(stderr, "ERROR: cannot find disk of %s\n", argv[1]);
+		return 1;
+	}
+
+	sprintf(disk_name, "/dev/sd%c", 'a' + disk);
+
+	printf("Setting startup partition : %s%d\n", disk_name, partition);
+
+	ret = emile_map_set_startup(disk_name, partition - 1);
+	if (ret == -1) {
+		fprintf(stderr, "ERROR: cannot set startup partition\n");
+		return 1;
+	}
+
+	return 0;
+}