Add the show command to print the partition information ala gpt(8).
Update the manpage accordingly. While here, mention the MBR scheme and add a bugs section. With this commit gpt(8) can be obsoleted.
This commit is contained in:
Marcel Moolenaar
parent
3745c395ec
commit
c83e7f0d4c
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=172837
@ -31,8 +31,8 @@ __FBSDID("$FreeBSD$");
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#include <stdint.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <err.h>
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#include <fcntl.h>
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#include <readpassphrase.h>
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#include <string.h>
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#include <strings.h>
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#include <libgeom.h>
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@ -49,6 +49,8 @@ uint32_t version = 0;
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static char optional[] = "";
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static char flags[] = "C";
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static void gpart_show(struct gctl_req *, unsigned);
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struct g_command class_commands[] = {
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{ "add", 0, NULL, {
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{ 'b', "start", NULL, G_TYPE_STRING },
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@ -86,6 +88,186 @@ struct g_command class_commands[] = {
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G_OPT_SENTINEL },
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"geom", NULL
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},
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{ "show", 0, gpart_show, G_NULL_OPTS, "[geom ...]", NULL },
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{ "undo", 0, NULL, G_NULL_OPTS, "geom", NULL },
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G_CMD_SENTINEL
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};
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static struct gclass *
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find_class(struct gmesh *mesh, const char *name)
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{
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struct gclass *classp;
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LIST_FOREACH(classp, &mesh->lg_class, lg_class) {
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if (strcmp(classp->lg_name, name) == 0)
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return (classp);
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}
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return (NULL);
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}
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static struct ggeom *
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find_geom(struct gclass *classp, const char *name)
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{
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struct ggeom *gp;
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LIST_FOREACH(gp, &classp->lg_geom, lg_geom) {
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if (strcmp(gp->lg_name, name) == 0)
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return (gp);
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}
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return (NULL);
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}
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static const char *
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find_geomcfg(struct ggeom *gp, const char *cfg)
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{
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struct gconfig *gc;
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LIST_FOREACH(gc, &gp->lg_config, lg_config) {
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if (!strcmp(gc->lg_name, cfg))
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return (gc->lg_val);
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}
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return (NULL);
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}
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static const char *
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find_provcfg(struct gprovider *pp, const char *cfg)
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{
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struct gconfig *gc;
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LIST_FOREACH(gc, &pp->lg_config, lg_config) {
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if (!strcmp(gc->lg_name, cfg))
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return (gc->lg_val);
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}
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return (NULL);
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}
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static struct gprovider *
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find_provider(struct ggeom *gp, unsigned long long minsector)
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{
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struct gprovider *pp, *bestpp;
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unsigned long long offset;
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unsigned long long sector, bestsector;
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bestpp = NULL;
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LIST_FOREACH(pp, &gp->lg_provider, lg_provider) {
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offset = atoll(find_provcfg(pp, "offset"));
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sector = offset / pp->lg_sectorsize;
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if (sector < minsector)
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continue;
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if (bestpp != NULL && sector >= bestsector)
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continue;
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bestpp = pp;
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bestsector = sector;
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}
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return (bestpp);
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}
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static const char *
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fmtsize(long double rawsz)
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{
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static char buf[32];
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static const char *sfx[] = { "B", "KB", "MB", "GB", "TB" };
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long double sz;
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int sfxidx;
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sfxidx = 0;
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sz = (long double)rawsz;
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while (sfxidx < 4 && sz > 1099.0) {
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sz /= 1000;
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sfxidx++;
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}
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sprintf(buf, "%.1Lf%s", sz, sfx[sfxidx]);
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return (buf);
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}
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static void
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gpart_show_geom(struct ggeom *gp)
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{
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struct gprovider *pp;
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const char *s, *scheme;
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unsigned long long first, last, sector, end;
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unsigned long long offset, length, secsz;
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int idx, wblocks, wname;
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scheme = find_geomcfg(gp, "scheme");
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s = find_geomcfg(gp, "first");
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first = atoll(s);
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s = find_geomcfg(gp, "last");
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last = atoll(s);
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wblocks = strlen(s);
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wname = strlen(gp->lg_name);
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pp = LIST_FIRST(&gp->lg_consumer)->lg_provider;
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secsz = pp->lg_sectorsize;
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printf("=>%*llu %*llu %*s %s (%s)\n",
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wblocks, first, wblocks, (last - first + 1),
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wname, gp->lg_name,
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scheme, fmtsize(pp->lg_mediasize));
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while ((pp = find_provider(gp, first)) != NULL) {
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s = find_provcfg(pp, "offset");
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offset = atoll(s);
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sector = offset / secsz;
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s = find_provcfg(pp, "length");
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length = atoll(s);
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s = find_provcfg(pp, "index");
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idx = atoi(s);
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end = sector + length / secsz;
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if (first < sector) {
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printf(" %*llu %*llu %*s - free - (%s)\n",
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wblocks, first, wblocks, sector - first,
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wname, "",
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fmtsize((sector - first) * secsz));
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}
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printf(" %*llu %*llu %*d %s (%s)\n",
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wblocks, sector, wblocks, end - sector,
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wname, idx,
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find_provcfg(pp, "type"), fmtsize(pp->lg_mediasize));
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first = end;
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}
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if (first <= last) {
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printf(" %*llu %*llu %*s - free - (%s)\n",
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wblocks, first, wblocks, last - first + 1,
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wname, "",
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fmtsize((last - first + 1) * secsz));
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}
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printf("\n");
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}
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static void
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gpart_show(struct gctl_req *req, unsigned fl __unused)
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{
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struct gmesh mesh;
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struct gclass *classp;
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struct ggeom *gp;
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const char *name;
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int error, i, nargs;
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name = gctl_get_ascii(req, "class");
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if (name == NULL)
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abort();
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error = geom_gettree(&mesh);
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if (error != 0)
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errc(EXIT_FAILURE, error, "Cannot get GEOM tree");
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classp = find_class(&mesh, name);
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if (classp == NULL) {
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geom_deletetree(&mesh);
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errx(EXIT_FAILURE, "Class %s not found.", name);
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}
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nargs = gctl_get_int(req, "nargs");
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if (nargs > 0) {
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for (i = 0; i < nargs; i++) {
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name = gctl_get_ascii(req, "arg%d", i);
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gp = find_geom(classp, name);
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if (gp != NULL)
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gpart_show_geom(gp);
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else
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errx(EXIT_FAILURE, "No such geom: %s.", name);
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}
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} else {
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LIST_FOREACH(gp, &classp->lg_geom, lg_geom) {
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gpart_show_geom(gp);
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}
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}
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geom_deletetree(&mesh);
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}
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@ -24,7 +24,7 @@
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.\"
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.\" $FreeBSD$
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.\"
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.Dd May 15, 2007
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.Dd Oct 20, 2007
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.Dt GPART 8
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.Os
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.Sh NAME
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@ -37,12 +37,15 @@ lines in your kernel configuration file:
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.Bd -ragged -offset indent
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.Cd "options GEOM_PART_APM"
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.Cd "options GEOM_PART_GPT"
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.Cd "options GEOM_PART_MBR"
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.Ed
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.Pp
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The GEOM_PART_APM option adds support for the Apple Partition Map (APM)
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found on Apple Macintosh computers, and the GEOM_PART_GPT option adds
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support for the GUID Partition Table (GPT) found on Intel Itanium
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computers and Intel-based Macintosh computers.
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found on Apple Macintosh computers.
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The GEOM_PART_GPT option adds support for the GUID Partition Table (GPT)
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found on Intel Itanium computers and Intel-based Macintosh computers.
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The GEOM_PART_MBR option adds support for the Master Boot Record (MBR)
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found on PCs and used on many removable media.
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.Pp
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Usage of the
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.Xr gpart 8
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@ -88,6 +91,10 @@ utility:
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.Op Fl t Ar type
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.Op Fl f Ar flags
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.Ar geom
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.\" ==== SHOW ====
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.Nm
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.Cm show
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.Op Ar geom ...
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.\" ==== UNDO ====
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.Nm
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.Cm undo
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@ -223,6 +230,10 @@ Additional operational flags.
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See the section entitled "Operational flags" below for a discussion
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about its use.
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.El
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.\" ==== SHOW ====
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.It Cm show
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Show the current partition information of the specified geoms
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or all geoms if none are specified.
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.\" ==== UNDO ====
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.It Cm undo
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Revert any pending changes.
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@ -254,7 +265,7 @@ A FreeBSD partition that uses the BSD disklabel to sub-divide the
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partition into file systems.
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This is a legacy partition type and should not be used for the APM
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or GPT schemes.
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The scheme-specific types are "!FreeBSD" for APM, and
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The scheme-specific types are "!165" for MBR, "!FreeBSD" for APM, and
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"!516e7cb4-6ecf-11d6-8ff8-00022d09712b" for GPT.
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.It freebsd-swap
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A FreeBSD partition dedicated to swap space.
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@ -304,5 +315,11 @@ The
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.Nm
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utility appeared in
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.Fx 7.0 .
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.Sh BUGS
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The MBR partitioning scheme cannot yet be used to create a bootable
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MBR.
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.Pp
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Support for the PC98 or Sun partitioning schemes is not yet present.
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The BSD disklabel is also not supported yet.
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.Sh AUTHORS
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.An Marcel Moolenaar Aq marcel@FreeBSD.org
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