1 files changed, 156 insertions, 0 deletions
diff --git a/usr/utils/mount_main.c b/usr/utils/mount_main.c
new file mode 100644
index 0000000..0d299c4
--- /dev/null
+++ b/usr/utils/mount_main.c
@@ -0,0 +1,156 @@
+/*
+ * by rmk
+ */
+#include <sys/mount.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <mntent.h>
+
+#include "mount_opts.h"
+
+#define _PATH_MOUNTED		"/etc/mtab"
+#define _PATH_PROC_MOUNTS	"/proc/mounts"
+
+char *progname;
+
+static struct extra_opts extra;
+static unsigned long rwflag;
+
+static __noreturn usage(void)
+{
+	fprintf(stderr, "Usage: %s [-r] [-w] [-o options] [-t type] [-f] [-i] "
+		"[-n] device directory\n", progname);
+	exit(1);
+}
+
+static __noreturn print_mount(char *type)
+{
+	FILE *mfp;
+	struct mntent *mnt;
+
+	mfp = setmntent(_PATH_PROC_MOUNTS, "r");
+	if (!mfp)
+		mfp = setmntent(_PATH_MOUNTED, "r");
+	if (!mfp)
+		perror("setmntent");
+
+	while ((mnt = getmntent(mfp)) != NULL) {
+		if (mnt->mnt_fsname && !strncmp(mnt->mnt_fsname, "no", 2))
+			continue;
+		if (type && mnt->mnt_type && strcmp(type, mnt->mnt_type))
+			continue;
+		printf("%s on %s", mnt->mnt_fsname, mnt->mnt_dir);
+		if (mnt->mnt_type != NULL && *mnt->mnt_type != '\0')
+			printf(" type %s", mnt->mnt_type);
+		if (mnt->mnt_opts != NULL && *mnt->mnt_opts != '\0')
+			printf(" (%s)", mnt->mnt_opts);
+		printf("\n");
+	}
+	endmntent(mfp);
+	exit(0);
+}
+
+static int
+do_mount(char *dev, char *dir, char *type, unsigned long rwflag, void *data)
+{
+	char *s;
+	int error = 0;
+
+	while ((s = strsep(&type, ",")) != NULL) {
+retry:
+		if (mount(dev, dir, s, rwflag, data) == -1) {
+			error = errno;
+			/*
+			 * If the filesystem is not found, or the
+			 * superblock is invalid, try the next.
+			 */
+			if (error == ENODEV || error == EINVAL)
+				continue;
+
+			/*
+			 * If we get EACCESS, and we're trying to
+			 * mount readwrite and this isn't a remount,
+			 * try read only.
+			 */
+			if (error == EACCES &&
+			    (rwflag & (MS_REMOUNT | MS_RDONLY)) == 0) {
+				rwflag |= MS_RDONLY;
+				goto retry;
+			}
+		} else {
+			error = 0;
+		}
+		break;
+	}
+
+	if (error) {
+		errno = error;
+		perror("mount");
+		return 255;
+	}
+
+	return 0;
+}
+
+int main(int argc, char *argv[])
+{
+	char *type = NULL;
+	int c;
+
+	progname = argv[0];
+	rwflag = MS_VERBOSE;
+
+	do {
+		c = getopt(argc, argv, "fhino:rt:w");
+		if (c == EOF)
+			break;
+		switch (c) {
+		case 'f':
+			/* we can't edit /etc/mtab yet anyway; exit */
+			exit(0);
+		case 'i':
+			/* ignore for now; no support for mount helpers */
+			break;
+		case 'h':
+			usage();
+		case 'n':
+			/* no mtab writing */
+			break;
+		case 'o':
+			rwflag = parse_mount_options(optarg, rwflag, &extra);
+			break;
+		case 'r':
+			rwflag |= MS_RDONLY;
+			break;
+		case 't':
+			type = optarg;
+			break;
+		case 'w':
+			rwflag &= ~MS_RDONLY;
+			break;
+		case '?':
+			fprintf(stderr, "%s: invalid option -%c\n",
+				progname, optopt);
+			exit(1);
+		}
+	} while (1);
+
+	if (optind == argc)
+		print_mount(type);
+
+	/*
+	 * If remount, bind or move was specified, then we don't
+	 * have a "type" as such.  Use the dummy "none" type.
+	 */
+	if (rwflag & MS_TYPE)
+		type = "none";
+
+	if (optind + 2 != argc || type == NULL)
+		usage();
+
+	return do_mount(argv[optind], argv[optind + 1], type, rwflag,
+			extra.str);
+}