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Added dev2name - translate (minor,major) device numbers, or (minor|major<<..)

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device number, to /dev/* node name.
This commit is contained in:
Ben Gras 2005-07-21 13:17:56 +00:00
parent b343c18712
commit da9b8e45f9
2 changed files with 63 additions and 0 deletions
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9
commands/simple/Makefile
View File

@ -66,6 +66,7 @@ ALL = \
date \ date \
dd \ dd \
decomp16 \ decomp16 \
dev2name \
df \ df \
dhrystone \ dhrystone \
diff \ diff \
@ -313,6 +314,10 @@ decomp16: decomp16.c
$(CCLD) -o $@ $? $(CCLD) -o $@ $?
@install -S 4kw $@ @install -S 4kw $@
dev2name: dev2name.c
$(CCLD) -o $@ $?
@install -S 4kw $@
df: df.c df: df.c
$(CCLD) -I$(SYS) -o $@ $? $(CCLD) -I$(SYS) -o $@ $?
@install -S 4kw $@ @install -S 4kw $@
@ -880,6 +885,7 @@ install: \
/usr/bin/date \ /usr/bin/date \
/usr/bin/dd \ /usr/bin/dd \
/usr/bin/decomp16 \ /usr/bin/decomp16 \
/bin/dev2name \
/usr/bin/df \ /usr/bin/df \
/usr/bin/dhrystone \ /usr/bin/dhrystone \
/usr/bin/diff \ /usr/bin/diff \
@ -1139,6 +1145,9 @@ install: \
/usr/bin/dd: dd /usr/bin/dd: dd
install -cs -o bin $? $@ install -cs -o bin $? $@
/bin/dev2name: dev2name
install -cs -o bin $? $@
/usr/bin/decomp16: decomp16 /usr/bin/decomp16: decomp16
install -cs -o bin $? $@ install -cs -o bin $? $@

54
commands/simple/dev2name.c Normal file
View File

@ -0,0 +1,54 @@
/* Translate internal FS device number to a /dev/ name. */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <dirent.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <minix/config.h>
#include <minix/const.h>
#define PATH_DEV "/dev"
int
main(int argc, char *argv[])
{
DIR *dev;
struct dirent *e;
int dev_n;
if(argc <= 1 || argc > 3) {
fprintf(stderr, "Usage: \n"
"%s <major> <minor>\n"
"%s <devicenumber>\n", argv[0], argv[0]);
return 1;
} else if(argc == 2) dev_n = atoi(argv[1]);
else if(argc == 3) dev_n = (atoi(argv[1]) << MAJOR) | atoi(argv[2]);
if(chdir(PATH_DEV) < 0) {
perror(PATH_DEV " chdir");
return 1;
}
if(!(dev=opendir("."))) {
perror(". in " PATH_DEV);
return 1;
}
while((e=readdir(dev))) {
struct stat st;
if(stat(e->d_name, &st) < 0) {
continue;
}
if((st.st_mode & (S_IFBLK | S_IFCHR)) && dev_n == st.st_rdev) {
printf("%s/%s\n", PATH_DEV, e->d_name);
return 0;
}
}
return 1;
}