
Путь: Toys/Other, команды версии: Ver.4 Ver.9 pwgen Комментарии в файле pwgen.c :
Исходный текст в файле pwgen.c #define FOR_pwgen
#include "toys.h"
GLOBALS(
char *r;
)
void pwgen_main(void)
{
int length = 8, count, ii, jj, c, rand = 0, x = 0;
unsigned xx = 80, yy = 24;
char randbuf[16];
if (isatty(1)) terminal_size(&xx, &yy);
else toys.optflags |= FLAG_1;
if (toys.optc && (length = atolx(*toys.optargs))>sizeof(toybuf))
error_exit("bad length");
if (toys.optc>1) count = atolx(toys.optargs[1]);
else count = FLAG(1) ? 1 : (xx/(length+1))*(yy-1);
for (jj = 0; jj<count; jj++) {
for (ii = 0; ii<length;) {
// Don't fetch more random than necessary, give each byte 2 tries to fit
if (!rand) xgetrandom(randbuf, rand = sizeof(randbuf));
c = 33+randbuf[--rand]%93; // remainder 69 makes >102 less likely
if (FLAG(s)) randbuf[rand] = 0;
if (c>='A' && c<='Z') {
if (FLAG(A)) continue;
// take out half the capital letters to be more human readable
else c |= (0x80&randbuf[rand])>>2;
}
if (FLAG(0) && c>='0' && c<='9') continue;
if (FLAG(B) && strchr("0O1lI8B5S2ZD'`.,", c)) continue;
if (FLAG(v) && strchr("aeiou", tolower(c))) continue;
if (!FLAG(y) || (0x80&randbuf[rand]))
if (c<'0' || (c>'9' && c<'A') || (c>'Z' && c<'a') || c>'z') continue;
if (TT.r && strchr(TT.r, c)) continue;
toybuf[ii++] = c;
}
if (FLAG(1) || (x += length+1)+length>=xx) x = 0;
xprintf("%.*s%c", length, toybuf, x ? ' ' : '\n');
}
if (x) xputc('\n');
} |
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