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33 * @(#)getbsize.c 8.1 (Berkeley) 6/4/93
42 getbsize(headerlenp, blocksizep)
46 static char header[20];
47 long n, max, mul, blocksize;
51 #define MB (1024L * 1024L)
52 #define GB (1024L * 1024L * 1024L)
53 #define MAXB GB /* No tera, peta, nor exa. */
55 if ((p = getenv("BLOCKSIZE")) != NULL && *p != '\0') {
56 if ((n = strtol(p, &ep, 10)) < 0)
83 fmterr: warnx("%s: unknown blocksize", p);
89 warnx("maximum blocksize is %ldG", MAXB / GB);
92 if ((blocksize = n * mul) < 512) {
93 underflow: warnx("minimum blocksize is 512");
100 (void)snprintf(header, sizeof(header), "%ld%s-blocks", n, form);
101 *headerlenp = strlen(header);
102 *blocksizep = blocksize;