Infrastructure, first drop of toy shell, and a bit of work on df.

1 files changed, 39 insertions, 0 deletions

diff --git a/lib/getmountlist.c b/lib/getmountlist.c
new file mode 100644
index 00000000..a2b0698d
--- /dev/null
+++ b/lib/getmountlist.c
@@ -0,0 +1,39 @@
+/* vi: set ts=4 : */
+
+#include "toys.h"
+
+#include <mntent.h>
+
+char *path_mounts = "/proc/mounts";
+
+// Get a list of mount points from /etc/mtab or /proc/mounts.  This returns
+// a reversed list, which is good for finding overmounts and such.
+
+struct mtab_list *getmountlist(int die)
+{
+	FILE *fp;
+	struct mtab_list *mtlist, *mt;
+	struct mntent me;
+	char evilbuf[2*PATH_MAX];
+
+	mtlist = 0;
+	if (!(fp = setmntent(path_mounts, "r"))) {
+		if (die) error_exit("cannot open %s", path_mounts);
+	} else {
+		while (getmntent_r(fp, &me, evilbuf, sizeof(evilbuf))) {
+			char *str;
+
+			mt = xmalloc(sizeof(struct mtab_list) + strlen(me.mnt_fsname) +
+				strlen(me.mnt_dir) + strlen(me.mnt_type) + 3);
+			mt->next = mtlist;
+			strcpy(mt->type, me.mnt_type);
+			mt->dir = mt->type + strlen(mt->type) + 1;
+			strcpy(mt->dir, me.mnt_dir);
+			mt->device = mt->dir + strlen(mt->dir) + 1;
+			mt->device = ++str;
+			strcpy(str, me.mnt_fsname);
+			mtlist = mt;
+		}
+	}
+	return mtlist;
+}