mirror of
https://github.com/ibm-s390-linux/s390-tools.git
synced 2026-08-05 02:14:52 +00:00
d0046257b6
Improvements for lszcrypt and chzcrypt: * lszcrypt -b and lszcrypt -d now check for default domain available and gives a warning if the current default domain is not in the usage_domain_mask of the AP bus. * lszcrypt without any further device also checks for the default domain and emits a warning string if the default domain is not available. * chzcrypt --default-domain emits a warning if the newly set default domain is not enabled in the usage_domain_mask of the AP bus. Suggested-by: Ingo Franzki <ifranzki@linux.ibm.com> Signed-off-by: Harald Freudenberger <freude@linux.ibm.com> Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
102 lines
2.1 KiB
C
102 lines
2.1 KiB
C
/*
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* Misc - Local helper functions
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*
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* Copyright IBM Corp. 2016, 2023
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#include <regex.h>
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#include <string.h>
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#include <sys/types.h>
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#include "lib/util_base.h"
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#include "lib/util_file.h"
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#include "lib/util_panic.h"
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#include "lib/util_path.h"
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#include "misc.h"
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/**
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* Test string against regular expression
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*
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* @param[in] str String to investigate
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* @param[in] regex Regular expression
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*
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* @returns true String matches with regular expression
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* false No match
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*/
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bool misc_regex_match(const char *str, const char *regex)
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{
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regmatch_t pmatch[1];
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regex_t preg;
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int rc;
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rc = regcomp(&preg, regex, REG_EXTENDED);
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util_assert(rc == 0, "The regcomp() function failed: rc = %d\n", rc);
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rc = regexec(&preg, str, (size_t) 1, pmatch, 0);
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regfree(&preg);
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return rc == 0 ? true : false;
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}
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/**
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* Test if AP bus has SB support available.
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*
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* @returns true Yes, SB support is available
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* false No
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*/
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bool ap_bus_has_SB_support(void)
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{
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static int sb_support = -1;
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if (sb_support < 0) {
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char *ap, buf[256];
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ap = util_path_sysfs("bus/ap");
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if (!util_path_is_dir(ap)) {
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sb_support = 0;
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} else {
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if (!util_path_is_readable("%s/features", ap)) {
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sb_support = 0;
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} else {
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util_file_read_line(buf, sizeof(buf),
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"%s/features", ap);
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if (strstr(buf, "APSB"))
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sb_support = 1;
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}
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}
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free(ap);
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}
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return sb_support > 0 ? true : false;
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}
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/*
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* Helper function: for a given hex string return the bit value.
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* Bit count starts on the left with 0.
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* Returns 0 or 1 or -1 on failure.
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*/
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int check_mask_bit(const char *mask, int bit)
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{
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int b;
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if (mask && mask[0] == '0' && mask[1] == 'x')
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mask += 2;
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while (*mask && bit >= 4) {
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mask++;
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bit -= 4;
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}
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if (*mask >= '0' && *mask <= '9')
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b = *mask - '0';
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else if (*mask >= 'a' && *mask <= 'f')
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b = *mask + 10 - 'a';
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else if (*mask >= 'A' && *mask <= 'F')
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b = *mask + 10 - 'A';
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else
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return -1;
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return b & (0x08 >> bit) ? 1 : 0;
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}
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