55 lines
1,000 B
C
55 lines
1,000 B
C
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/* Translate internal FS device number to a /dev/ name. */
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <dirent.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#define PATH_DEV "/dev"
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int
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main(int argc, char *argv[])
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{
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DIR *dev;
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struct dirent *e;
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int dev_n;
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if(argc <= 1 || argc > 3) {
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fprintf(stderr, "Usage: \n"
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"%s <major> <minor>\n"
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"%s <devicenumber>\n", argv[0], argv[0]);
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return 1;
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} else if(argc == 2) dev_n = atoi(argv[1]);
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else if(argc == 3) dev_n = (atoi(argv[1]) << MAJOR) | atoi(argv[2]);
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if(chdir(PATH_DEV) < 0) {
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perror(PATH_DEV " chdir");
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return 1;
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}
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if(!(dev=opendir("."))) {
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perror(". in " PATH_DEV);
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return 1;
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}
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while((e=readdir(dev))) {
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struct stat st;
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if(stat(e->d_name, &st) < 0) {
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continue;
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}
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if((st.st_mode & (S_IFBLK | S_IFCHR)) && dev_n == st.st_rdev) {
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printf("%s/%s\n", PATH_DEV, e->d_name);
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return 0;
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}
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}
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return 1;
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}
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