54 lines
940 B
C
54 lines
940 B
C
#define NMOUNT 16
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#define NAMSIZ 32
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struct mtab {
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char file[NAMSIZ];
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char spec[NAMSIZ];
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} mtab[NMOUNT];
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main(argc, argv)
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char **argv;
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{
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register struct mtab *mp;
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register char *p1, *p2;
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int mf;
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sync();
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mf = open("/etc/mtab", 0);
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read(mf, mtab, NMOUNT*2*NAMSIZ);
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if(argc != 2) {
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printf("arg count\n");
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return;
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}
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if (umount(argv[1]) < 0) {
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perror("umount");
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return;
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}
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p1 = argv[1];
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while(*p1++)
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;
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p1--;
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while(*--p1 == '/')
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*p1 = '\0';
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while(p1 > argv[1] && *--p1 != '/')
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;
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if(*p1 == '/')
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p1++;
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argv[1] = p1;
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for (mp = mtab; mp < &mtab[NMOUNT]; mp++) {
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p1 = argv[1];
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p2 = &mp->spec[0];
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while (*p1++ == *p2)
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if (*p2++ == 0) {
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for (p1 = mp->file; p1 < &mp->file[NAMSIZ*2];)
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*p1++ = 0;
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mp = &mtab[NMOUNT];
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while ((--mp)->file[0] == 0);
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mf = creat("/etc/mtab", 0644);
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write(mf, mtab, (mp-mtab+1)*2*NAMSIZ);
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return;
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}
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}
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printf("%s not in mount table\n", argv[1]);
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}
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