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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 19:10:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 19:10:49 +0000
commitcfe5e3905201349e9cf3f95d52ff4bd100bde37d (patch)
treed0baf160cbee3195249d095f85e52d20c21acf02 /disk-utils/partx.c
parentInitial commit. (diff)
downloadutil-linux-cfe5e3905201349e9cf3f95d52ff4bd100bde37d.tar.xz
util-linux-cfe5e3905201349e9cf3f95d52ff4bd100bde37d.zip
Adding upstream version 2.39.3.upstream/2.39.3
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'disk-utils/partx.c')
-rw-r--r--disk-utils/partx.c1081
1 files changed, 1081 insertions, 0 deletions
diff --git a/disk-utils/partx.c b/disk-utils/partx.c
new file mode 100644
index 0000000..8078e9c
--- /dev/null
+++ b/disk-utils/partx.c
@@ -0,0 +1,1081 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ *
+ * partx: tell the kernel about your disk's partitions
+ * [This is not an fdisk - adding and removing partitions
+ * is not a change of the disk, but just telling the kernel
+ * about presence and numbering of on-disk partitions.]
+ *
+ * aeb, 2000-03-21 -- sah is 42 now
+ *
+ * Copyright (C) 2010 Davidlohr Bueso <dave@gnu.org>
+ * Rewritten to use libblkid for util-linux
+ * based on ideas from Karel Zak <kzak@redhat.com>
+ */
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <assert.h>
+#include <dirent.h>
+
+#include <blkid.h>
+#include <libsmartcols.h>
+
+#include "c.h"
+#include "pathnames.h"
+#include "nls.h"
+#include "blkdev.h"
+#include "strutils.h"
+#include "xalloc.h"
+#include "partx.h"
+#include "sysfs.h"
+#include "loopdev.h"
+#include "closestream.h"
+#include "optutils.h"
+
+/* this is the default upper limit, could be modified by --nr */
+#define SLICES_MAX 256
+
+/* basic table settings */
+enum {
+ PARTX_RAW = (1 << 0),
+ PARTX_NOHEADINGS = (1 << 1),
+ PARTX_EXPORT = (1 << 2),
+};
+
+/* all the columns (-o option) */
+enum {
+ COL_PARTNO,
+ COL_START,
+ COL_END,
+ COL_SECTORS,
+ COL_SIZE,
+ COL_NAME,
+ COL_UUID,
+ COL_TYPE,
+ COL_FLAGS,
+ COL_SCHEME,
+};
+
+#define ACT_ERROR "--{add,delete,show,list,raw,pairs}"
+enum {
+ ACT_NONE,
+ ACT_LIST,
+ ACT_SHOW,
+ ACT_ADD,
+ ACT_UPD,
+ ACT_DELETE
+};
+
+enum {
+ FL_BYTES = (1 << 1)
+};
+
+/* column names */
+struct colinfo {
+ const char *name; /* header */
+ double whint; /* width hint (N < 1 is in percent of termwidth) */
+ int flags; /* SCOLS_FL_* */
+ const char *help;
+};
+
+/* columns descriptions */
+static struct colinfo infos[] = {
+ [COL_PARTNO] = { "NR", 0.25, SCOLS_FL_RIGHT, N_("partition number") },
+ [COL_START] = { "START", 0.30, SCOLS_FL_RIGHT, N_("start of the partition in sectors") },
+ [COL_END] = { "END", 0.30, SCOLS_FL_RIGHT, N_("end of the partition in sectors") },
+ [COL_SECTORS] = { "SECTORS", 0.30, SCOLS_FL_RIGHT, N_("number of sectors") },
+ [COL_SIZE] = { "SIZE", 0.30, SCOLS_FL_RIGHT, N_("human readable size") },
+ [COL_NAME] = { "NAME", 0.30, SCOLS_FL_TRUNC, N_("partition name") },
+ [COL_UUID] = { "UUID", 36, 0, N_("partition UUID")},
+ [COL_SCHEME] = { "SCHEME", 0.1, SCOLS_FL_TRUNC, N_("partition table type (dos, gpt, ...)")},
+ [COL_FLAGS] = { "FLAGS", 0.1, SCOLS_FL_TRUNC, N_("partition flags")},
+ [COL_TYPE] = { "TYPE", 1, SCOLS_FL_RIGHT, N_("partition type (a string, a UUID, or hex)")},
+};
+
+#define NCOLS ARRAY_SIZE(infos)
+
+/* array with IDs of enabled columns */
+static int columns[NCOLS];
+static size_t ncolumns;
+
+static int verbose;
+static int partx_flags;
+static struct loopdev_cxt lc;
+static int loopdev;
+
+static void assoc_loopdev(const char *fname)
+{
+ int rc;
+
+ if (loopcxt_init(&lc, 0))
+ err(EXIT_FAILURE, _("failed to initialize loopcxt"));
+
+ rc = loopcxt_find_unused(&lc);
+ if (rc)
+ err(EXIT_FAILURE, _("%s: failed to find unused loop device"),
+ fname);
+
+ if (verbose)
+ printf(_("Trying to use '%s' for the loop device\n"),
+ loopcxt_get_device(&lc));
+
+ if (loopcxt_set_backing_file(&lc, fname))
+ err(EXIT_FAILURE, _("%s: failed to set backing file"), fname);
+
+ rc = loopcxt_setup_device(&lc);
+
+ if (rc == -EBUSY)
+ err(EXIT_FAILURE, _("%s: failed to set up loop device"), fname);
+
+ loopdev = 1;
+}
+
+static inline int get_column_id(int num)
+{
+ assert(ARRAY_SIZE(columns) == NCOLS);
+ assert((size_t)num < ncolumns);
+ assert(columns[num] < (int) NCOLS);
+ return columns[num];
+}
+
+static inline struct colinfo *get_column_info(int num)
+{
+ return &infos[ get_column_id(num) ];
+}
+
+static int column_name_to_id(const char *name, size_t namesz)
+{
+ size_t i;
+
+ assert(name);
+
+ for (i = 0; i < NCOLS; i++) {
+ const char *cn = infos[i].name;
+
+ if (!strncasecmp(name, cn, namesz) && !*(cn + namesz))
+ return i;
+ }
+ warnx(_("unknown column: %s"), name);
+ return -1;
+}
+
+/*
+ * Given a partition return the corresponding partition number.
+ *
+ * Note that this function tries to use sysfs, otherwise it assumes that the
+ * last characters are always numeric (sda1, sdc20, etc).
+ */
+static int get_partno_from_device(char *partition, dev_t devno)
+{
+ int partno = 0;
+ size_t sz;
+ char *p, *end = NULL;
+
+ assert(partition);
+
+ if (devno) {
+ struct path_cxt *pc;
+ int rc;
+
+ pc = ul_new_sysfs_path(devno, NULL, NULL);
+ if (!pc)
+ goto err;
+
+ rc = ul_path_read_s32(pc, &partno, "partition");
+ ul_unref_path(pc);
+
+ if (rc == 0)
+ return partno;
+ }
+
+ sz = strlen(partition);
+ p = partition + sz - 1;
+
+ if (!isdigit((unsigned char) *p))
+ goto err;
+
+ while (isdigit((unsigned char) *(p - 1))) p--;
+
+ errno = 0;
+ partno = strtol(p, &end, 10);
+ if (errno || !end || *end || p == end)
+ goto err;
+
+ return partno;
+err:
+ errx(EXIT_FAILURE, _("%s: failed to get partition number"), partition);
+}
+
+static int get_max_partno(const char *disk, dev_t devno)
+{
+ char path[PATH_MAX], *parent, *dirname = NULL;
+ struct stat st;
+ DIR *dir;
+ struct dirent *d;
+ int partno = 0;
+
+ if (!devno && !stat(disk, &st))
+ devno = st.st_rdev;
+ if (!devno)
+ goto dflt;
+ parent = strrchr(disk, '/');
+ if (!parent)
+ goto dflt;
+ parent++;
+
+ snprintf(path, sizeof(path), _PATH_SYS_DEVBLOCK "/%d:%d/",
+ major(devno), minor(devno));
+
+ dir = opendir(path);
+ if (!dir)
+ goto dflt;
+
+ dirname = xstrdup(path);
+
+ while ((d = readdir(dir))) {
+ int fd;
+
+ if (!strcmp(d->d_name, ".") ||
+ !strcmp(d->d_name, ".."))
+ continue;
+#ifdef _DIRENT_HAVE_D_TYPE
+ if (d->d_type != DT_DIR && d->d_type != DT_UNKNOWN)
+ continue;
+#endif
+ if (strncmp(parent, d->d_name, strlen(parent)) != 0)
+ continue;
+ snprintf(path, sizeof(path), "%s/partition", d->d_name);
+
+ fd = openat(dirfd(dir), path, O_RDONLY);
+ if (fd) {
+ int x = 0;
+ FILE *f = fdopen(fd, "r");
+ if (f) {
+ if (fscanf(f, "%d", &x) == 1 && x > partno)
+ partno = x;
+ fclose(f);
+ }
+ }
+ }
+
+ free(dirname);
+ closedir(dir);
+ return partno;
+dflt:
+ return SLICES_MAX;
+}
+
+static int recount_range_by_pt(blkid_partlist ls, int *lower, int *upper)
+{
+ int n = 0, i, nparts = blkid_partlist_numof_partitions(ls);
+
+ for (i = 0; i < nparts; i++) {
+ blkid_partition par = blkid_partlist_get_partition(ls, i);
+ int partno = blkid_partition_get_partno(par);
+ n = max(partno, n);
+ }
+
+ if (*lower < 0)
+ *lower = n + *lower + 1;
+ if (*upper < 0)
+ *upper = n + *upper + 1;
+
+ if (*lower > *upper && *upper != 0) {
+ warnx(_("specified range <%d:%d> does not make sense"), *lower, *upper);
+ return -EINVAL;
+ }
+ if (verbose)
+ printf(_("range recount: max partno=%d, lower=%d, upper=%d\n"), n, *lower, *upper);
+ return 0;
+}
+
+static void del_parts_warnx(const char *device, int first, int last)
+{
+ if (first == last)
+ warnx(_("%s: error deleting partition %d"), device, first);
+ else
+ warnx(_("%s: error deleting partitions %d-%d"),
+ device, first, last);
+}
+
+static int del_parts(int fd, const char *device, dev_t devno,
+ int lower, int upper)
+{
+ int rc = 0, i, errfirst = 0, errlast = 0;
+
+ assert(fd >= 0);
+ assert(device);
+
+ /* recount range by information in /sys */
+ if (!lower)
+ lower = 1;
+ if (!upper || lower < 0 || upper < 0) {
+ int n = get_max_partno(device, devno);
+ if (!upper)
+ upper = n;
+ else if (upper < 0)
+ upper = n + upper + 1;
+ if (lower < 0)
+ lower = n + lower + 1;
+ }
+ if (lower > upper) {
+ warnx(_("specified range <%d:%d> "
+ "does not make sense"), lower, upper);
+ return -1;
+ }
+
+ for (i = lower; i <= upper; i++) {
+ if (partx_del_partition(fd, i) == 0) {
+ if (verbose)
+ printf(_("%s: partition #%d removed\n"), device, i);
+ continue;
+ }
+
+ if (errno == ENXIO) {
+ if (verbose)
+ printf(_("%s: partition #%d doesn't exist\n"), device, i);
+ continue;
+ }
+ rc = -1;
+ if (verbose)
+ warn(_("%s: deleting partition #%d failed"), device, i);
+ if (!errfirst)
+ errlast = errfirst = i;
+ else if (errlast + 1 == i)
+ errlast++;
+ else {
+ del_parts_warnx(device, errfirst, errlast);
+ errlast = errfirst = i;
+ }
+ }
+
+ if (errfirst)
+ del_parts_warnx(device, errfirst, errlast);
+ return rc;
+}
+
+
+static void add_parts_warnx(const char *device, int first, int last)
+{
+ if (first == last)
+ warnx(_("%s: error adding partition %d"), device, first);
+ else
+ warnx(_("%s: error adding partitions %d-%d"),
+ device, first, last);
+}
+
+static int add_parts(int fd, const char *device,
+ blkid_partlist ls, int lower, int upper)
+{
+ int i, nparts, rc, errfirst = 0, errlast = 0;
+
+ assert(fd >= 0);
+ assert(device);
+ assert(ls);
+
+ rc = recount_range_by_pt(ls, &lower, &upper);
+ if (rc)
+ return rc;
+
+ nparts = blkid_partlist_numof_partitions(ls);
+
+ for (i = 0; i < nparts; i++) {
+ blkid_partition par = blkid_partlist_get_partition(ls, i);
+ int n = blkid_partition_get_partno(par);
+ uintmax_t start, size;
+
+ if (lower && n < lower)
+ continue;
+ if (upper && n > upper)
+ continue;
+
+ start = blkid_partition_get_start(par);
+ size = blkid_partition_get_size(par);
+
+ if (blkid_partition_is_extended(par))
+ /*
+ * Let's follow the Linux kernel and reduce
+ * DOS extended partition to 1 or 2 sectors.
+ */
+ size = min(size, (uintmax_t) 2);
+
+ if (partx_add_partition(fd, n, start, size) == 0) {
+ if (verbose)
+ printf(_("%s: partition #%d added\n"), device, n);
+ continue;
+ }
+ rc = -1;
+ if (verbose)
+ warn(_("%s: adding partition #%d failed"), device, n);
+ if (!errfirst)
+ errlast = errfirst = n;
+ else if (errlast + 1 == n)
+ errlast++;
+ else {
+ add_parts_warnx(device, errfirst, errlast);
+ errlast = errfirst = n;
+ }
+ }
+
+ if (errfirst)
+ add_parts_warnx(device, errfirst, errlast);
+
+ /*
+ * The kernel with enabled partitions scanner for loop devices add *all*
+ * partitions, so we should delete any extra, unwanted ones, when the -n
+ * option is passed.
+ */
+ if (loopdev && loopcxt_is_partscan(&lc) && (lower || upper)) {
+ for (i = 0; i < nparts; i++) {
+ blkid_partition par = blkid_partlist_get_partition(ls, i);
+ int n = blkid_partition_get_partno(par);
+
+ if (n < lower || n > upper)
+ partx_del_partition(fd, n);
+ }
+ }
+
+ return rc;
+}
+
+static void upd_parts_warnx(const char *device, int first, int last)
+{
+ if (first == last)
+ warnx(_("%s: error updating partition %d"), device, first);
+ else
+ warnx(_("%s: error updating partitions %d-%d"),
+ device, first, last);
+}
+
+static int upd_parts(int fd, const char *device, dev_t devno,
+ blkid_partlist ls, int lower, int upper)
+{
+ int n, nparts, rc = 0, errfirst = 0, errlast = 0, err;
+ blkid_partition par;
+ uintmax_t start, size;
+
+ assert(fd >= 0);
+ assert(device);
+ assert(ls);
+
+ /* recount range by information in /sys, if on disk number of
+ * partitions is greater than in /sys the use on-disk limit */
+ nparts = blkid_partlist_numof_partitions(ls);
+ if (!lower)
+ lower = 1;
+ if (!upper || lower < 0 || upper < 0) {
+ n = get_max_partno(device, devno);
+ if (!upper)
+ upper = n > nparts ? n : nparts;
+ else if (upper < 0)
+ upper = n + upper + 1;
+ if (lower < 0)
+ lower = n + lower + 1;
+ }
+ if (lower > upper) {
+ warnx(_("specified range <%d:%d> "
+ "does not make sense"), lower, upper);
+ return -1;
+ }
+
+ for (n = lower; n <= upper; n++) {
+ par = blkid_partlist_get_partition_by_partno(ls, n);
+ if (!par) {
+ if (verbose)
+ warn(_("%s: no partition #%d"), device, n);
+ continue;
+ }
+
+ start = blkid_partition_get_start(par);
+ size = blkid_partition_get_size(par);
+ if (blkid_partition_is_extended(par))
+ /*
+ * Let's follow the Linux kernel and reduce
+ * DOS extended partition to 1 or 2 sectors.
+ */
+ size = min(size, (uintmax_t) 2);
+
+ err = partx_del_partition(fd, n);
+ if (err == -1 && errno == ENXIO)
+ err = 0; /* good, it already doesn't exist */
+ if (err == -1 && errno == EBUSY)
+ {
+ /* try to resize */
+ err = partx_resize_partition(fd, n, start, size);
+ if (verbose)
+ printf(_("%s: partition #%d resized\n"), device, n);
+ if (err == 0)
+ continue;
+ }
+ if (err == 0 && partx_add_partition(fd, n, start, size) == 0) {
+ if (verbose)
+ printf(_("%s: partition #%d added\n"), device, n);
+ continue;
+ }
+
+ if (err == 0)
+ continue;
+ rc = -1;
+ if (verbose)
+ warn(_("%s: updating partition #%d failed"), device, n);
+ if (!errfirst)
+ errlast = errfirst = n;
+ else if (errlast + 1 == n)
+ errlast++;
+ else {
+ upd_parts_warnx(device, errfirst, errlast);
+ errlast = errfirst = n;
+ }
+ }
+
+ if (errfirst)
+ upd_parts_warnx(device, errfirst, errlast);
+ return rc;
+}
+
+static int list_parts(blkid_partlist ls, int lower, int upper)
+{
+ int i, nparts, rc;
+
+ assert(ls);
+
+ rc = recount_range_by_pt(ls, &lower, &upper);
+ if (rc)
+ return rc;
+
+ nparts = blkid_partlist_numof_partitions(ls);
+
+ for (i = 0; i < nparts; i++) {
+ blkid_partition par = blkid_partlist_get_partition(ls, i);
+ int n = blkid_partition_get_partno(par);
+ uintmax_t start, size;
+
+ if (lower && n < lower)
+ continue;
+ if (upper && n > upper)
+ continue;
+
+ start = blkid_partition_get_start(par);
+ size = blkid_partition_get_size(par);
+
+ printf(P_("#%2d: %9ju-%9ju (%9ju sector, %6ju MB)\n",
+ "#%2d: %9ju-%9ju (%9ju sectors, %6ju MB)\n",
+ size),
+ n, start, start + size -1,
+ size, (size << 9) / 1000000);
+ }
+ return 0;
+}
+
+static int add_scols_line(struct libscols_table *table, blkid_partition par)
+{
+ struct libscols_line *line;
+ int i, rc = 0;
+
+ assert(table);
+ assert(par);
+
+ line = scols_table_new_line(table, NULL);
+ if (!line) {
+ warn(_("failed to allocate output line"));
+ return -ENOMEM;
+ }
+
+ for (i = 0; (size_t)i < ncolumns; i++) {
+ char *str = NULL; /* allocated string */
+ const char *cstr = NULL; /* foreign string */
+
+ switch (get_column_id(i)) {
+ case COL_PARTNO:
+ xasprintf(&str, "%d", blkid_partition_get_partno(par));
+ break;
+ case COL_START:
+ xasprintf(&str, "%ju", blkid_partition_get_start(par));
+ break;
+ case COL_END:
+ xasprintf(&str, "%ju",
+ blkid_partition_get_start(par) +
+ blkid_partition_get_size(par) - 1);
+ break;
+ case COL_SECTORS:
+ xasprintf(&str, "%ju", blkid_partition_get_size(par));
+ break;
+ case COL_SIZE:
+ if (partx_flags & FL_BYTES)
+ xasprintf(&str, "%ju", (uintmax_t)
+ blkid_partition_get_size(par) << 9);
+ else
+ str = size_to_human_string(SIZE_SUFFIX_1LETTER,
+ blkid_partition_get_size(par) << 9);
+ break;
+ case COL_NAME:
+ cstr = blkid_partition_get_name(par);
+ break;
+ case COL_UUID:
+ cstr = blkid_partition_get_uuid(par);
+ break;
+ case COL_TYPE:
+ if (blkid_partition_get_type_string(par))
+ cstr = blkid_partition_get_type_string(par);
+ else
+ xasprintf(&str, "0x%x",
+ blkid_partition_get_type(par));
+ break;
+ case COL_FLAGS:
+ xasprintf(&str, "0x%llx", blkid_partition_get_flags(par));
+ break;
+ case COL_SCHEME:
+ {
+ blkid_parttable tab = blkid_partition_get_table(par);
+ if (tab)
+ cstr = blkid_parttable_get_type(tab);
+ break;
+ }
+ default:
+ break;
+ }
+
+ if (cstr)
+ rc = scols_line_set_data(line, i, cstr);
+ else if (str)
+ rc = scols_line_refer_data(line, i, str);
+ if (rc) {
+ warn(_("failed to add output data"));
+ break;
+ }
+ }
+
+ return rc;
+}
+
+static int show_parts(blkid_partlist ls, int scols_flags, int lower, int upper)
+{
+ int i, rc = -1;
+ struct libscols_table *table;
+ int nparts;
+
+ assert(ls);
+
+ nparts = blkid_partlist_numof_partitions(ls);
+ if (!nparts)
+ return 0;
+
+ scols_init_debug(0);
+ table = scols_new_table();
+ if (!table) {
+ warn(_("failed to allocate output table"));
+ return -1;
+ }
+ scols_table_enable_raw(table, !!(scols_flags & PARTX_RAW));
+ scols_table_enable_export(table, !!(scols_flags & PARTX_EXPORT));
+ scols_table_enable_noheadings(table, !!(scols_flags & PARTX_NOHEADINGS));
+
+ for (i = 0; (size_t)i < ncolumns; i++) {
+ struct colinfo *col = get_column_info(i);
+
+ if (!scols_table_new_column(table, col->name, col->whint, col->flags)) {
+ warnx(_("failed to allocate output column"));
+ goto done;
+ }
+ }
+
+ rc = recount_range_by_pt(ls, &lower, &upper);
+ if (rc)
+ goto done;
+
+ for (i = 0; i < nparts; i++) {
+ blkid_partition par = blkid_partlist_get_partition(ls, i);
+ int n = blkid_partition_get_partno(par);
+
+ if (lower && n < lower)
+ continue;
+ if (upper && n > upper)
+ continue;
+
+ rc = add_scols_line(table, par);
+ if (rc)
+ break;
+ }
+
+ rc = 0;
+ scols_print_table(table);
+done:
+ scols_unref_table(table);
+ return rc;
+}
+
+static blkid_partlist get_partlist(blkid_probe pr,
+ const char *device, char *type)
+{
+ blkid_partlist ls;
+ blkid_parttable tab;
+
+ assert(pr);
+ assert(device);
+
+ if (type) {
+ char *name[] = { type, NULL };
+
+ if (blkid_probe_filter_partitions_type(pr,
+ BLKID_FLTR_ONLYIN, name)) {
+ warnx(_("failed to initialize blkid "
+ "filter for '%s'"), type);
+ return NULL;
+ }
+ }
+
+ ls = blkid_probe_get_partitions(pr);
+ if (!ls) {
+ warnx(_("%s: failed to read partition table"), device);
+ return NULL;
+ }
+
+ tab = blkid_partlist_get_table(ls);
+ if (verbose && tab) {
+ printf(_("%s: partition table type '%s' detected\n"),
+ device, blkid_parttable_get_type(tab));
+
+ if (!blkid_partlist_numof_partitions(ls))
+ printf(_("%s: partition table with no partitions"), device);
+ }
+
+ return ls;
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ FILE *out = stdout;
+ size_t i;
+
+ fputs(USAGE_HEADER, out);
+ fprintf(out,
+ _(" %s [-a|-d|-s|-u] [--nr <n:m> | <partition>] <disk>\n"),
+ program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, out);
+ fputs(_("Tell the kernel about the presence and numbering of partitions.\n"), out);
+
+ fputs(USAGE_OPTIONS, out);
+ fputs(_(" -a, --add add specified partitions or all of them\n"), out);
+ fputs(_(" -d, --delete delete specified partitions or all of them\n"), out);
+ fputs(_(" -u, --update update specified partitions or all of them\n"), out);
+ fputs(_(" -s, --show list partitions\n\n"), out);
+ fputs(_(" -b, --bytes print SIZE in bytes rather than in human readable format\n"), out);
+ fputs(_(" -g, --noheadings don't print headings for --show\n"), out);
+ fputs(_(" -n, --nr <n:m> specify the range of partitions (e.g. --nr 2:4)\n"), out);
+ fputs(_(" -o, --output <list> define which output columns to use\n"), out);
+ fputs(_(" --output-all output all columns\n"), out);
+ fputs(_(" -P, --pairs use key=\"value\" output format\n"), out);
+ fputs(_(" -r, --raw use raw output format\n"), out);
+ fputs(_(" -S, --sector-size <num> overwrite sector size\n"), out);
+ fputs(_(" -t, --type <type> specify the partition type\n"), out);
+ fputs(_(" --list-types list supported partition types and exit\n"), out);
+ fputs(_(" -v, --verbose verbose mode\n"), out);
+
+ fputs(USAGE_SEPARATOR, out);
+ printf(USAGE_HELP_OPTIONS(22));
+
+ fputs(USAGE_COLUMNS, out);
+ for (i = 0; i < NCOLS; i++)
+ fprintf(out, " %10s %s\n", infos[i].name, _(infos[i].help));
+
+ printf(USAGE_MAN_TAIL("partx(8)"));
+
+ exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char **argv)
+{
+ int fd, c, what = ACT_NONE, lower = 0, upper = 0, rc = 0;
+ int scols_flags = 0;
+ char *type = NULL;
+ char *device = NULL; /* pointer to argv[], ie: /dev/sda1 */
+ char *wholedisk = NULL; /* allocated, ie: /dev/sda */
+ char *outarg = NULL;
+ dev_t disk_devno = 0, part_devno = 0;
+ unsigned int sector_size = 0;
+
+ enum {
+ OPT_LIST_TYPES = CHAR_MAX + 1,
+ OPT_OUTPUT_ALL
+ };
+ static const struct option long_opts[] = {
+ { "bytes", no_argument, NULL, 'b' },
+ { "noheadings", no_argument, NULL, 'g' },
+ { "raw", no_argument, NULL, 'r' },
+ { "list", no_argument, NULL, 'l' },
+ { "show", no_argument, NULL, 's' },
+ { "add", no_argument, NULL, 'a' },
+ { "delete", no_argument, NULL, 'd' },
+ { "update", no_argument, NULL, 'u' },
+ { "type", required_argument, NULL, 't' },
+ { "list-types", no_argument, NULL, OPT_LIST_TYPES },
+ { "nr", required_argument, NULL, 'n' },
+ { "output", required_argument, NULL, 'o' },
+ { "output-all", no_argument, NULL, OPT_OUTPUT_ALL },
+ { "pairs", no_argument, NULL, 'P' },
+ { "sector-size",required_argument, NULL, 'S' },
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, 'V' },
+ { "verbose", no_argument, NULL, 'v' },
+ { NULL, 0, NULL, 0 }
+ };
+
+ static const ul_excl_t excl[] = { /* rows and cols in ASCII order */
+ { 'P','a','d','l','r','s','u' },
+ { 0 }
+ };
+ int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ close_stdout_atexit();
+
+ while ((c = getopt_long(argc, argv,
+ "abdglrsuvn:t:o:PS:hV", long_opts, NULL)) != -1) {
+
+ err_exclusive_options(c, long_opts, excl, excl_st);
+
+ switch(c) {
+ case 'a':
+ what = ACT_ADD;
+ break;
+ case 'b':
+ partx_flags |= FL_BYTES;
+ break;
+ case 'd':
+ what = ACT_DELETE;
+ break;
+ case 'g':
+ scols_flags |= PARTX_NOHEADINGS;
+ break;
+ case 'l':
+ what = ACT_LIST;
+ break;
+ case 'n':
+ if (parse_range(optarg, &lower, &upper, 0))
+ errx(EXIT_FAILURE, _("failed to parse --nr <M-N> range"));
+ break;
+ case 'o':
+ outarg = optarg;
+ break;
+ case OPT_OUTPUT_ALL:
+ for (ncolumns = 0; ncolumns < ARRAY_SIZE(infos); ncolumns++)
+ columns[ncolumns] = ncolumns;
+ break;
+ case 'P':
+ scols_flags |= PARTX_EXPORT;
+ what = ACT_SHOW;
+ break;
+ case 'r':
+ scols_flags |= PARTX_RAW;
+ what = ACT_SHOW;
+ break;
+ case 's':
+ what = ACT_SHOW;
+ break;
+ case 'S':
+ sector_size = strtou32_or_err(optarg, _("invalid sector size argument"));
+ break;
+ case 't':
+ type = optarg;
+ break;
+ case 'u':
+ what = ACT_UPD;
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case OPT_LIST_TYPES:
+ {
+ size_t idx = 0;
+ const char *name = NULL;
+
+ while (blkid_partitions_get_name(idx++, &name) == 0)
+ puts(name);
+ return EXIT_SUCCESS;
+ }
+ case 'h':
+ usage();
+ case 'V':
+ print_version(EXIT_SUCCESS);
+ default:
+ errtryhelp(EXIT_FAILURE);
+ }
+ }
+
+ if (what == ACT_NONE)
+ what = ACT_SHOW;
+
+ /* --show default, could by modified by -o */
+ if (what == ACT_SHOW && !ncolumns) {
+ columns[ncolumns++] = COL_PARTNO;
+ columns[ncolumns++] = COL_START;
+ columns[ncolumns++] = COL_END;
+ columns[ncolumns++] = COL_SECTORS;
+ columns[ncolumns++] = COL_SIZE;
+ columns[ncolumns++] = COL_NAME;
+ columns[ncolumns++] = COL_UUID;
+ }
+
+ if (what == ACT_SHOW && outarg &&
+ string_add_to_idarray(outarg, columns, ARRAY_SIZE(columns),
+ &ncolumns, column_name_to_id) < 0)
+ return EXIT_FAILURE;
+
+ /*
+ * Note that 'partx /dev/sda1' == 'partx /dev/sda1 /dev/sda'
+ * so assume that the device and/or disk are always the last
+ * arguments to be passed to partx.
+ */
+ if (optind == argc - 2) {
+ /* passed 2 arguments:
+ * /dev/sda1 /dev/sda : partition + whole-disk
+ * -- /dev/sda1 : partition that should be used as a whole-disk
+ */
+ device = argv[optind];
+
+ if (strcmp(device, "-") == 0) {
+ device = NULL;
+ wholedisk = xstrdup(argv[optind + 1]);
+ } else {
+ device = argv[optind];
+ wholedisk = xstrdup(argv[optind + 1]);
+
+ if (device && wholedisk && !startswith(device, wholedisk))
+ errx(EXIT_FAILURE, _("partition and disk name do not match"));
+ }
+ } else if (optind == argc - 1) {
+ /* passed only one arg (ie: /dev/sda3 or /dev/sda) */
+ struct stat sb;
+
+ device = argv[optind];
+
+ if (stat(device, &sb))
+ err(EXIT_FAILURE, _("stat of %s failed"), device);
+
+ part_devno = sb.st_rdev;
+
+ if (blkid_devno_to_wholedisk(part_devno,
+ NULL, 0, &disk_devno) == 0 &&
+ part_devno != disk_devno)
+ wholedisk = blkid_devno_to_devname(disk_devno);
+
+ if (!wholedisk) {
+ wholedisk = xstrdup(device);
+ disk_devno = part_devno;
+ device = NULL;
+ part_devno = 0;
+ }
+ } else {
+ warnx(_("bad usage"));
+ errtryhelp(EXIT_FAILURE);
+ }
+ if (device && (upper || lower))
+ errx(EXIT_FAILURE, _("--nr and <partition> are mutually exclusive"));
+
+ assert(wholedisk);
+
+ if (device) {
+ /* use partno from given partition instead of --nr range, e.g:
+ * partx -d /dev/sda3
+ * is the same like:
+ * partx -d --nr 3 /dev/sda
+ */
+ struct stat sb;
+
+ if (!part_devno && !stat(device, &sb))
+ part_devno = sb.st_rdev;
+
+ lower = upper = get_partno_from_device(device, part_devno);
+ }
+
+ if (verbose)
+ printf(_("partition: %s, disk: %s, lower: %d, upper: %d\n"),
+ device ? device : "none", wholedisk, lower, upper);
+
+ if (what == ACT_ADD || what == ACT_DELETE) {
+ struct stat x;
+
+ if (stat(wholedisk, &x))
+ errx(EXIT_FAILURE, "%s", wholedisk);
+
+ if (S_ISREG(x.st_mode)) {
+ /* not a blkdev, try to associate it to a loop device */
+ if (what == ACT_DELETE)
+ errx(EXIT_FAILURE, _("%s: cannot delete partitions"),
+ wholedisk);
+ if (!loopmod_supports_partscan())
+ errx(EXIT_FAILURE, _("%s: partitioned loop devices unsupported"),
+ wholedisk);
+ assoc_loopdev(wholedisk);
+ free(wholedisk);
+ wholedisk = xstrdup(lc.device);
+ } else if (!S_ISBLK(x.st_mode))
+ errx(EXIT_FAILURE, _("%s: not a block device"), wholedisk);
+ }
+ if ((fd = open(wholedisk, O_RDONLY)) == -1)
+ err(EXIT_FAILURE, _("cannot open %s"), wholedisk);
+
+ if (what == ACT_DELETE)
+ rc = del_parts(fd, wholedisk, disk_devno, lower, upper);
+ else {
+ blkid_probe pr = blkid_new_probe();
+ blkid_partlist ls = NULL;
+
+ if (!pr || blkid_probe_set_device(pr, fd, 0, 0))
+ warnx(_("%s: failed to initialize blkid prober"),
+ wholedisk);
+ else {
+ if (sector_size)
+ blkid_probe_set_sectorsize(pr, sector_size);
+
+ ls = get_partlist(pr, wholedisk, type);
+ }
+
+ if (ls) {
+ switch (what) {
+ case ACT_SHOW:
+ rc = show_parts(ls, scols_flags, lower, upper);
+ break;
+ case ACT_LIST:
+ rc = list_parts(ls, lower, upper);
+ break;
+ case ACT_ADD:
+ rc = add_parts(fd, wholedisk, ls, lower, upper);
+ break;
+ case ACT_UPD:
+ rc = upd_parts(fd, wholedisk, disk_devno, ls, lower, upper);
+ break;
+ case ACT_NONE:
+ break;
+ default:
+ abort();
+ }
+ } else
+ rc = 1;
+
+ blkid_free_probe(pr);
+ }
+
+ free(wholedisk);
+
+ if (loopdev)
+ loopcxt_deinit(&lc);
+
+ if (close_fd(fd) != 0)
+ err(EXIT_FAILURE, _("write failed"));
+
+ return rc ? EXIT_FAILURE : EXIT_SUCCESS;
+}