mirror of
https://codeberg.org/libreboot/lbmk.git
synced 2026-03-25 21:39:03 +02:00
2ed8db3adc
handle init in xstatus() it's now a singleton design also tidied up some other code also removed todo.c. bloat. will do all those anyway. too much change. i just kept touching the code until it looked good Signed-off-by: Leah Rowe <leah@libreboot.org>
102 lines
1.8 KiB
C
102 lines
1.8 KiB
C
/* SPDX-License-Identifier: MIT
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*
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* Copyright (c) 2026 Leah Rowe <leah@libreboot.org>
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*
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* Numerical functions.
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*/
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#ifdef __OpenBSD__
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#include <sys/param.h>
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "../include/common.h"
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unsigned short
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hextonum(char ch_s)
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{
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unsigned char ch;
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ch = (unsigned char)ch_s;
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if ((unsigned int)(ch - '0') <= 9)
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return ch - '0';
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ch |= 0x20;
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if ((unsigned int)(ch - 'a') <= 5)
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return ch - 'a' + 10;
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if (ch == '?' || ch == 'x')
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return (unsigned short)rlong() & 0xf;
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return 16; /* invalid character */
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}
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/* Random numbers
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*/
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unsigned long
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rlong(void)
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{
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#if (defined(__OpenBSD__) && (OpenBSD) >= 201) || \
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defined(__FreeBSD__) || \
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defined(__NetBSD__) || defined(__APPLE__)
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unsigned long rval;
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arc4random_buf(&rval, sizeof(unsigned long));
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return rval;
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#else
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int fd;
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long nr;
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unsigned long rval;
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fd = open("/dev/urandom", O_RDONLY | O_BINARY);
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#ifdef __OpenBSD__
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if (fd < 0) /* old openbsd */
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fd = open("/dev/arandom", O_RDONLY | O_BINARY);
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#endif
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if (fd < 0)
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fd = open("/dev/random", O_RDONLY | O_BINARY);
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if (fd < 0)
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err(errno, "can't open random device");
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nr = rw_file_exact(fd, (unsigned char *)&rval,
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sizeof(unsigned long), 0, IO_READ, LOOP_EAGAIN,
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LOOP_EINTR, MAX_ZERO_RW_RETRY, OFF_ERR);
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if (x_i_close(fd) < 0)
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err(errno, "Can't close randomness fd");
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if (nr != sizeof(unsigned long))
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err(errno, "Incomplete read from random device");
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return rval;
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#endif
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}
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void
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check_bin(unsigned long a, const char *a_name)
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{
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if (a > 1)
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err(EINVAL, "%s must be 0 or 1, but is %lu",
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a_name, (unsigned long)a);
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}
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