diff options
Diffstat (limited to 'extras/multipath-tools/devmap_name')
| -rw-r--r-- | extras/multipath-tools/devmap_name/Makefile | 47 | ||||
| -rw-r--r-- | extras/multipath-tools/devmap_name/devmap_name.8 | 30 | ||||
| -rw-r--r-- | extras/multipath-tools/devmap_name/devmap_name.c | 60 |
3 files changed, 137 insertions, 0 deletions
diff --git a/extras/multipath-tools/devmap_name/Makefile b/extras/multipath-tools/devmap_name/Makefile new file mode 100644 index 0000000000..a9683341b2 --- /dev/null +++ b/extras/multipath-tools/devmap_name/Makefile @@ -0,0 +1,47 @@ +# Makefile +# +# Copyright (C) 2003 Christophe Varoqui, <christophe.varoqui@free.fr> + +EXEC = devmap_name + +prefix = +exec_prefix = ${prefix} +bindir = ${exec_prefix}/sbin +udevdir = ../../.. +klibcdir = $(udevdir)/klibc +mandir = /usr/share/man/man8 +libdmdir = ../libdevmapper + +CC = gcc +GZIP = /bin/gzip -9 -c + +GCCINCDIR := ${shell $(CC) -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp"} +KERNEL_DIR = /lib/modules/${shell uname -r}/build +CFLAGS = -pipe -g -O2 -Wall -Wunused -Wstrict-prototypes -nostdinc \ + -I$(klibcdir)/klibc/include -I$(klibcdir)/klibc/include/bits32 \ + -I$(GCCINCDIR) -I$(KERNEL_DIR)/include -I$(sysfsdir) -I. + +OBJS = devmap_name.o +CRT0 = $(klibcdir)/klibc/crt0.o +LIB = $(klibcdir)/klibc/libc.a +LIBGCC := $(shell $(CC) -print-libgcc-file-name ) + +DMOBJS = $(libdmdir)/libdm-common.o $(libdmdir)/ioctl/libdevmapper.o + +$(EXEC): $(OBJS) + $(LD) -o $(EXEC) $(CRT0) $(OBJS) $(DMOBJS) $(LIB) $(LIBGCC) + strip $(EXEC) + $(GZIP) $(EXEC).8 > $(EXEC).8.gz + +clean: + rm -f core *.o $(EXEC) *.gz + +install: + install -d $(DESTDIR)$(bindir) + install -m 755 $(EXEC) $(DESTDIR)$(bindir)/ + install -d $(DESTDIR)$(mandir) + install -m 644 $(EXEC).8.gz $(DESTDIR)$(mandir) + +uninstall: + rm $(DESTDIR)$(bindir)/$(EXEC) + rm $(DESTDIR)$(mandir)/$(EXEC).8.gz diff --git a/extras/multipath-tools/devmap_name/devmap_name.8 b/extras/multipath-tools/devmap_name/devmap_name.8 new file mode 100644 index 0000000000..f4f03c3ec6 --- /dev/null +++ b/extras/multipath-tools/devmap_name/devmap_name.8 @@ -0,0 +1,30 @@ +.TH DEVMAP_NAME 8 "February 2004" "" "Linux Administrator's Manual" +.SH NAME +devmap_name \- Query device-mapper name +.SH SYNOPSIS +.BI devmap_name " major minor" +.SH DESCRIPTION +.B devmap_name +queries the device-mapper for the name for the device +specified by +.I major +and +.I minor +number. +.br +.B devmap_name +can be called from +.B udev +by the following rule in +.IR /etc/udev/udev.rules : +.sp +.nf +KERNEL="dm-[0-9]*", PROGRAM="/sbin/devmap_name %M %m", \\ + NAME="%k", SYMLINK="%c" +.fi +.SH "SEE ALSO" +.BR udev (8), +.BR dmsetup (8) +.SH AUTHORS +.B devmap_name +was developed by Christophe Varoqui, <christophe.varoqui@free.fr> and others. diff --git a/extras/multipath-tools/devmap_name/devmap_name.c b/extras/multipath-tools/devmap_name/devmap_name.c new file mode 100644 index 0000000000..0932e4f8bb --- /dev/null +++ b/extras/multipath-tools/devmap_name/devmap_name.c @@ -0,0 +1,60 @@ +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <linux/kdev_t.h> + +#include "../libdevmapper/libdevmapper.h" + +static void usage(char * progname) { + fprintf(stderr, "usage : %s major minor\n", progname); + exit(1); +} + +int main(int argc, char **argv) +{ + int r = 0; + struct dm_names *names; + unsigned next = 0; + int major, minor; + + /* sanity check */ + if (argc != 3) + usage(argv[0]); + + major = atoi(argv[1]); + minor = atoi(argv[2]); + + struct dm_task *dmt; + + if (!(dmt = dm_task_create(DM_DEVICE_LIST))) + return 0; + + if (!dm_task_run(dmt)) + goto out; + + if (!(names = dm_task_get_names(dmt))) + goto out; + + if (!names->dev) { + printf("No devices found\n"); + goto out; + } + + do { + names = (void *) names + next; + if ((int) MAJOR(names->dev) == major && + (int) MINOR(names->dev) == minor) { + printf("%s\n", names->name); + goto out; + } + next = names->next; + } while (next); + + /* No correspondance found */ + r = 1; + + out: + dm_task_destroy(dmt); + return r; +} + |