libfdisk: add fdisk_get_devmodel() and fdisk_get_devno()

Signed-off-by: Karel Zak <kzak@redhat.com>

5 files changed, 61 insertions, 0 deletions

diff --git a/libfdisk/docs/libfdisk-sections.txt b/libfdisk/docs/libfdisk-sections.txt
index ecc37caf4..4b9d92e18 100644
--- a/libfdisk/docs/libfdisk-sections.txt
+++ b/libfdisk/docs/libfdisk-sections.txt
@@ -300,7 +300,9 @@ fdisk_disable_dialogs
 fdisk_get_alignment_offset
 fdisk_get_collision
 fdisk_get_devfd
+fdisk_get_devmodel
 fdisk_get_devname
+fdisk_get_devno
 fdisk_get_disklabel_item
 fdisk_get_first_lba
 fdisk_get_geom_cylinders
diff --git a/libfdisk/src/context.c b/libfdisk/src/context.c
index 779a9a889..ad5f99de4 100644
--- a/libfdisk/src/context.c
+++ b/libfdisk/src/context.c
@@ -112,6 +112,10 @@ static int init_nested_from_parent(struct fdisk_context *cxt, int isnew)
 		cxt->protect_bootbits = parent->protect_bootbits;
 	}
 
+	free(cxt->dev_model);
+	cxt->dev_model = NULL;
+	cxt->dev_model_probed = 0;
+
 	free(cxt->dev_path);
 	cxt->dev_path = NULL;
 
@@ -541,6 +545,10 @@ static void reset_context(struct fdisk_context *cxt)
 	free(cxt->dev_path);
 	cxt->dev_path = NULL;
 
+	free(cxt->dev_model);
+	cxt->dev_model = NULL;
+	cxt->dev_model_probed = 0;
+
 	free(cxt->collision);
 	cxt->collision = NULL;
 
@@ -1326,6 +1334,48 @@ const char *fdisk_get_devname(struct fdisk_context *cxt)
 }
 
 /**
+ * fdisk_get_devno:
+ * @cxt: context
+ *
+ * Returns: device number or zero for non-block devices
+ */
+dev_t fdisk_get_devno(struct fdisk_context *cxt)
+{
+	assert(cxt);
+	return S_ISBLK(cxt->dev_st.st_mode) ? cxt->dev_st.st_rdev : 0;
+}
+
+/**
+ * fdisk_get_devmodel:
+ * @cxt: context
+ *
+ * Returns: device model string or NULL.
+ */
+const char *fdisk_get_devmodel(struct fdisk_context *cxt)
+{
+#ifdef __linux__
+	assert(cxt);
+
+	if (cxt->dev_model_probed)
+		return cxt->dev_model;
+
+	if (fdisk_get_devno(cxt)) {
+		struct path_cxt *pc = ul_new_sysfs_path(fdisk_get_devno(cxt), NULL, NULL);
+
+		if (pc) {
+			ul_path_read_string(pc, &cxt->dev_model, "device/model");
+			ul_unref_path(pc);
+		}
+	}
+	cxt->dev_model_probed = 1;
+	return cxt->dev_model;
+#else
+	return NULL;
+#endif
+
+}
+
+/**
  * fdisk_get_devfd:
  * @cxt: context
  *
diff --git a/libfdisk/src/fdiskP.h b/libfdisk/src/fdiskP.h
index bf2f60e08..19c1c7953 100644
--- a/libfdisk/src/fdiskP.h
+++ b/libfdisk/src/fdiskP.h
@@ -365,6 +365,7 @@ struct fdisk_ask {
 struct fdisk_context {
 	int dev_fd;         /* device descriptor */
 	char *dev_path;     /* device path */
+	char *dev_model;    /* on linux /sys/block/<name>/device/model or NULL */
 	struct stat dev_st; /* stat(2) result */
 
 	int refcount;
@@ -387,6 +388,7 @@ struct fdisk_context {
 		     protect_bootbits : 1,	/* don't zeroize first sector */
 		     pt_collision : 1,		/* another PT detected by libblkid */
 		     no_disalogs : 1,		/* disable dialog-driven partititoning */
+		     dev_model_probed : 1,	/* tried to read from sys */
 		     listonly : 1;		/* list partition, nothing else */
 
 	char *collision;			/* name of already existing FS/PT */
diff --git a/libfdisk/src/libfdisk.h.in b/libfdisk/src/libfdisk.h.in
index 0f8ecd96f..6f5188d3f 100644
--- a/libfdisk/src/libfdisk.h.in
+++ b/libfdisk/src/libfdisk.h.in
@@ -28,6 +28,7 @@ extern "C" {
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdint.h>
+#include <sys/types.h>
 
 /**
  * LIBFDISK_VERSION:
@@ -231,8 +232,12 @@ fdisk_sector_t fdisk_set_first_lba(struct fdisk_context *cxt, fdisk_sector_t lba
 fdisk_sector_t fdisk_get_last_lba(struct fdisk_context *cxt);
 fdisk_sector_t fdisk_set_last_lba(struct fdisk_context *cxt, fdisk_sector_t lba);
 fdisk_sector_t fdisk_get_nsectors(struct fdisk_context *cxt);
+
 const char *fdisk_get_devname(struct fdisk_context *cxt);
 int fdisk_get_devfd(struct fdisk_context *cxt);
+dev_t fdisk_get_devno(struct fdisk_context *cxt);
+const char *fdisk_get_devmodel(struct fdisk_context *cxt);
+
 
 unsigned int fdisk_get_geom_heads(struct fdisk_context *cxt);
 fdisk_sector_t fdisk_get_geom_sectors(struct fdisk_context *cxt);
diff --git a/libfdisk/src/libfdisk.sym b/libfdisk/src/libfdisk.sym
index c9f35bebb..8f80d7964 100644
--- a/libfdisk/src/libfdisk.sym
+++ b/libfdisk/src/libfdisk.sym
@@ -300,4 +300,6 @@ FDISK_2.32 {
 
 FDISK_2.33 {
 	fdisk_ask_number_is_wrap_negative;
+	fdisk_get_devmodel;
+	fdisk_get_devno;
 } FDISK_2.32;