From 2f0649f6fe411d7e07c8d56cf8ea56db53536da8 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:06:04 +0200 Subject: Adding upstream version 2.0.13. Signed-off-by: Daniel Baumann --- usr/utils/mount_main.c | 156 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 156 insertions(+) create mode 100644 usr/utils/mount_main.c (limited to 'usr/utils/mount_main.c') 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 +#include +#include +#include +#include +#include +#include + +#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); +} -- cgit v1.2.3