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Commit | Line | Data |
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1848564d MT |
1 | #!/bin/bash |
2 | ############################################################################### | |
3 | # # | |
4 | # IPFire.org - A linux based firewall # | |
5 | # Copyright (C) 2010 Michael Tremer & Christian Schmidt # | |
6 | # # | |
7 | # This program is free software: you can redistribute it and/or modify # | |
8 | # it under the terms of the GNU General Public License as published by # | |
9 | # the Free Software Foundation, either version 3 of the License, or # | |
10 | # (at your option) any later version. # | |
11 | # # | |
12 | # This program is distributed in the hope that it will be useful, # | |
13 | # but WITHOUT ANY WARRANTY; without even the implied warranty of # | |
14 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # | |
15 | # GNU General Public License for more details. # | |
16 | # # | |
17 | # You should have received a copy of the GNU General Public License # | |
18 | # along with this program. If not, see <http://www.gnu.org/licenses/>. # | |
19 | # # | |
20 | ############################################################################### | |
21 | ||
97cb552e | 22 | # A simple print statement |
1c6a4e30 | 23 | print() { |
acc9efd5 MT |
24 | local fmt=${1}; shift |
25 | ||
40e3553f | 26 | printf -- "${fmt}\n" "$@" |
97cb552e MT |
27 | } |
28 | ||
cb965348 MT |
29 | # The args() function takes a number of arguments like |
30 | # var1="abc d" var2="abc" var3="abcd e" | |
31 | # and splits them into several arguments, devided by newline | |
1c6a4e30 | 32 | args() { |
cb965348 MT |
33 | echo "$@" | xargs printf "%s\n" |
34 | } | |
35 | ||
1c6a4e30 | 36 | unquote() { |
04854c77 MT |
37 | local var="$@" |
38 | ||
39 | if [ "${var:0:1}" = "\"" ]; then | |
40 | var=${var:1} | |
41 | fi | |
42 | ||
43 | local last=$(( ${#var} - 1 )) | |
44 | if [ ${last} -ge 0 ] && [ "${var:${last}:1}" = "\"" ]; then | |
45 | var=${var:0:${last}} | |
46 | fi | |
47 | ||
48 | print "${var}" | |
49 | } | |
50 | ||
1c6a4e30 | 51 | quote() { |
04854c77 MT |
52 | print "\"%s\"" "$@" |
53 | } | |
54 | ||
1c6a4e30 | 55 | strip() { |
fe52c5e0 MT |
56 | local value="$@" |
57 | ||
58 | # remove leading whitespace characters | |
59 | value="${value#"${value%%[![:space:]]*}"}" | |
60 | ||
61 | # remove trailing whitespace characters | |
62 | value="${value%"${value##*[![:space:]]}"}" | |
63 | ||
64 | print "${value}" | |
65 | } | |
66 | ||
1848564d | 67 | # Print a pretty error message |
1c6a4e30 | 68 | error() { |
fcbf6823 | 69 | echo -e " ${CLR_RED_B}ERROR${CLR_RESET} : $@" >&2 |
1848564d MT |
70 | } |
71 | ||
1c6a4e30 | 72 | error_log() { |
1b7a1578 MT |
73 | log ERROR "$@" |
74 | } | |
75 | ||
1848564d | 76 | # Print a pretty warn message |
1c6a4e30 | 77 | warning() { |
fcbf6823 | 78 | echo -e " ${CLR_YELLOW_B}WARNING${CLR_RESET}: $@" >&2 |
1848564d MT |
79 | } |
80 | ||
1c6a4e30 | 81 | warning_log() { |
1b7a1578 MT |
82 | log WARNING "$@" |
83 | } | |
84 | ||
1848564d | 85 | # Speedup function to avoid a call of the basename binary |
1c6a4e30 | 86 | basename() { |
1848564d MT |
87 | echo "${1##*/}" |
88 | } | |
89 | ||
1c6a4e30 | 90 | format() { |
e5651e17 MT |
91 | local key=${1} |
92 | assert isset key | |
93 | ||
94 | local format=${2} | |
95 | assert isset format | |
96 | ||
97 | shift 2 | |
98 | ||
99 | printf -v "${key}" "${format}" "$@" | |
100 | } | |
101 | ||
d13929d4 MT |
102 | format_time() { |
103 | local s=${1} | |
104 | local ret m | |
105 | ||
106 | local units="s m h" | |
107 | ||
108 | local unit | |
109 | for unit in ${units}; do | |
110 | m=$(( ${s} % 60 )) | |
111 | s=$(( ${s} / 60 )) | |
112 | ||
113 | if [ ${m} -gt 0 ]; then | |
114 | ret="${m}${unit} ${ret}" | |
115 | fi | |
116 | done | |
117 | ||
118 | # Remove whitespace | |
119 | echo ${ret} | |
120 | } | |
121 | ||
b383499d MT |
122 | parse_time() { |
123 | local ret=0 | |
124 | ||
125 | local arg | |
126 | for arg in $@; do | |
127 | local unit | |
128 | ||
129 | case "${arg}" in | |
130 | *h|*m|*s) | |
131 | # Store unit | |
132 | unit="${arg: -1}" | |
133 | ||
134 | # Remove unit | |
135 | arg="${arg:0:-1}" | |
136 | ;; | |
137 | esac | |
138 | ||
139 | if ! isinteger arg; then | |
140 | return ${EXIT_ERROR} | |
141 | fi | |
142 | ||
143 | # Convert hours and minutes into seconds | |
144 | case "${unit}" in | |
145 | h) | |
146 | arg=$(( ${arg} * 3600 )) | |
147 | ;; | |
148 | m) | |
149 | arg=$(( ${arg} * 60 )) | |
150 | ;; | |
151 | esac | |
152 | ||
153 | # Add up everything | |
154 | ret=$(( ${ret} + ${arg} )) | |
155 | done | |
156 | ||
157 | print "${ret}" | |
158 | } | |
159 | ||
1c6a4e30 | 160 | assign() { |
b79ad79b MT |
161 | local key=${1} |
162 | assert isset key | |
163 | shift | |
164 | ||
e5651e17 | 165 | format "${key}" "%s" "$@" |
b79ad79b MT |
166 | } |
167 | ||
1c6a4e30 | 168 | fread() { |
b79ad79b MT |
169 | local file=${1} |
170 | assert isset file | |
171 | ||
172 | [ -r "${file}" ] || return ${EXIT_ERROR} | |
173 | ||
174 | print "$(<${file})" | |
175 | } | |
176 | ||
1c6a4e30 | 177 | fwrite() { |
b79ad79b MT |
178 | local file=${1} |
179 | assert isset file | |
180 | shift | |
181 | ||
8d4e0d52 MT |
182 | if [ ! -w "${file}" ]; then |
183 | log ERROR "${file}: No such file" | |
184 | return ${EXIT_ERROR} | |
185 | fi | |
186 | ||
187 | print "%s" "$@" >> ${file} 2>/dev/null | |
b79ad79b MT |
188 | } |
189 | ||
c041b631 MT |
190 | make_parent_dir() { |
191 | local path="${1}" | |
192 | ||
193 | local dirname="$(dirname "${path}")" | |
194 | mkdir -p "${dirname}" | |
195 | } | |
196 | ||
1c6a4e30 | 197 | enabled() { |
1848564d MT |
198 | local param=${1} |
199 | ||
e726ef8d | 200 | list_match "${!param}" yes on true 1 |
1848564d MT |
201 | } |
202 | ||
1c6a4e30 | 203 | mac_generate() { |
fb1416c6 MT |
204 | local b="$(random 12)" |
205 | ||
206 | # Remove multicast bit | |
207 | # and set address is software assigned | |
208 | local first_byte=$(( 0x${b:0:2} & 0xfe )) | |
209 | first_byte=$(( ${first_byte} | 0x02 )) | |
1848564d MT |
210 | |
211 | local output | |
fb1416c6 | 212 | printf -v output "%02x" "${first_byte}" |
790b7ec9 | 213 | |
fb1416c6 | 214 | output="${output}:${b:2:2}:${b:4:2}:${b:6:2}:${b:8:2}:${b:10:2}" |
1848564d MT |
215 | |
216 | # Check if output is valid | |
fb1416c6 | 217 | assert mac_is_valid "${output}" |
1848564d | 218 | |
790b7ec9 | 219 | echo "${output}" |
1848564d MT |
220 | } |
221 | ||
1c6a4e30 | 222 | mac_format() { |
18b43372 | 223 | local mac=${1} |
48bc31eb | 224 | assert isset mac |
18b43372 | 225 | |
48bc31eb MT |
226 | # Remove all colons and make the rest lowercase. |
227 | mac=${mac//:/} | |
228 | mac=${mac,,} | |
18b43372 | 229 | |
48bc31eb | 230 | local output |
18b43372 MT |
231 | if [ "${#mac}" = "12" ]; then |
232 | # Add colons (:) to mac address | |
233 | output=${mac:0:2} | |
234 | local i | |
235 | for i in 2 4 6 8 10; do | |
236 | output="${output}:${mac:${i}:2}" | |
237 | done | |
48bc31eb MT |
238 | else |
239 | output=${mac} | |
18b43372 MT |
240 | fi |
241 | ||
242 | assert mac_is_valid ${output} | |
243 | ||
48bc31eb | 244 | print "${output}" |
18b43372 MT |
245 | } |
246 | ||
1c6a4e30 | 247 | mac_is_valid() { |
1848564d MT |
248 | local mac=${1} |
249 | ||
250 | [[ ${mac} =~ ^([0-9a-f]{2}\:){5}[0-9a-f]{2}$ ]] | |
251 | } | |
252 | ||
1c6a4e30 | 253 | uuid() { |
de543653 | 254 | echo $(</proc/sys/kernel/random/uuid) |
1848564d MT |
255 | } |
256 | ||
a24cff8f JS |
257 | abs() { |
258 | local val=${1} | |
259 | ||
260 | if [ ${val} -lt 0 ]; then | |
261 | (( val *= -1 )) | |
262 | fi | |
263 | ||
264 | echo ${val} | |
265 | } | |
266 | ||
fb1416c6 MT |
267 | rand() { |
268 | local uuid="$(uuid)" | |
269 | echo "${uuid//-/}" | |
270 | } | |
271 | ||
272 | random() { | |
273 | local length="${1:-8}" | |
274 | ||
275 | local random | |
276 | while [ ${#random} -lt ${length} ]; do | |
277 | random="${random}$(rand)" | |
278 | done | |
279 | ||
280 | echo "${random:0:${length}}" | |
281 | } | |
282 | ||
1c6a4e30 | 283 | isset() { |
1848564d MT |
284 | local var=${1} |
285 | ||
286 | [ -n "${!var}" ] | |
287 | } | |
288 | ||
1c6a4e30 | 289 | isoneof() { |
1848564d MT |
290 | local var=${!1} |
291 | shift | |
292 | ||
e726ef8d | 293 | list_match "${var}" "$@" |
1848564d MT |
294 | } |
295 | ||
1c6a4e30 | 296 | isbool() { |
1848564d MT |
297 | local var=${1} |
298 | ||
ec6afbdd | 299 | isoneof ${var} 0 1 no yes on off true false |
1848564d MT |
300 | } |
301 | ||
1c6a4e30 | 302 | isinteger() { |
1848564d MT |
303 | local var=${!1} |
304 | ||
305 | [[ ${var} =~ ^[0-9]+$ ]] | |
306 | } | |
307 | ||
1c6a4e30 | 308 | ismac() { |
1848564d MT |
309 | local mac=${!1} |
310 | ||
311 | mac_is_valid ${mac} | |
312 | } | |
313 | ||
1c6a4e30 | 314 | isipaddress() { |
fef4edaf MT |
315 | local addr=${!1} |
316 | ||
317 | ip_is_valid ${addr} | |
318 | } | |
319 | ||
48a64768 JS |
320 | mtu_is_valid() { |
321 | local proto=${1} | |
322 | local mtu=${2} | |
323 | ||
324 | case ${proto} in | |
325 | ipv4) | |
326 | [ ${mtu} -ge 576 ] && [ ${mtu} -le 9000 ] | |
327 | ;; | |
328 | ipv6) | |
329 | [ ${mtu} -ge 1280 ] && [ ${mtu} -le 9000 ] | |
330 | ;; | |
331 | *) | |
332 | error "${proto} is not a valid proto" | |
333 | return ${EXIT_ERROR} | |
334 | ;; | |
335 | esac | |
336 | } | |
337 | ||
1c6a4e30 | 338 | backtrace() { |
711ffac1 MT |
339 | local start=1 |
340 | ||
341 | echo # Empty line | |
342 | error_log "Backtrace (most recent call in first line):" | |
343 | ||
04608623 | 344 | local i source |
711ffac1 MT |
345 | for i in $(seq ${start} ${#BASH_SOURCE[*]}); do |
346 | [ -z "${FUNCNAME[${i}]}" ] && continue | |
6396ccab MT |
347 | |
348 | # Print called binary with arguments. | |
349 | if [ "${FUNCNAME[${i}]}" == "main" ]; then | |
350 | local args="$(list_reverse ${BASH_ARGV[*]})" | |
351 | printf -v source "%20s" "$0" | |
352 | error_log " ${source} ${args}" | |
353 | continue | |
354 | fi | |
711ffac1 | 355 | |
04608623 MT |
356 | source=${BASH_SOURCE[$(( ${i} + 1 ))]} |
357 | error_log " $(printf "%20s" "'${FUNCNAME[${i}]}'") called from ${source:-<shell>}:${BASH_LINENO[${i}]}" | |
711ffac1 MT |
358 | done |
359 | } | |
360 | ||
1c6a4e30 | 361 | assert() { |
1848564d MT |
362 | local assertion="$@" |
363 | ||
364 | if ! ${assertion}; then | |
4c670d7c | 365 | error_log "Assertion '${assertion}' failed." |
711ffac1 | 366 | backtrace |
cfbe0802 | 367 | exit ${EXIT_ERROR_ASSERT} |
1848564d MT |
368 | fi |
369 | ||
370 | return ${EXIT_OK} | |
371 | } | |
cad8bd85 | 372 | |
b0b2f995 MT |
373 | # This function checks, if the given argument is an assert error |
374 | # exit code. If this is the case, the script will halt immediately. | |
1c6a4e30 | 375 | assert_check_retval() { |
b0b2f995 MT |
376 | local ret=${1} |
377 | ||
378 | if [ ${ret} -eq ${EXIT_ERROR_ASSERT} ]; then | |
379 | exit ${EXIT_ERROR_ASSERT} | |
380 | fi | |
381 | ||
382 | return ${ret} | |
383 | } | |
384 | ||
2bb20bbd SS |
385 | # This function executes the given command and inverses the return code |
386 | not() { | |
387 | local command="$@" | |
388 | ||
389 | ${command} && return ${EXIT_FALSE} || return ${EXIT_TRUE} | |
390 | } | |
391 | ||
1c6a4e30 | 392 | exec_cmd() { |
711ffac1 MT |
393 | local cmd=$@ |
394 | ||
395 | log DEBUG "Running command: ${cmd}" | |
396 | ||
b816e04b | 397 | DEBUG=${DEBUG} \ |
8c63fa13 MT |
398 | LOG_DISABLE_STDOUT="${LOG_DISABLE_STDOUT}" \ |
399 | LOG_FACILITY="${LOG_FACILITY}" \ | |
b816e04b | 400 | ${SHELL} ${cmd} |
711ffac1 MT |
401 | local ret=$? |
402 | ||
403 | #log DEBUG "Returned with code '${ret}'" | |
404 | ||
405 | if [ ${ret} -eq ${EXIT_ERROR_ASSERT} ]; then | |
406 | error_log "Stopping parent process due to assertion error in child process: ${cmd}" | |
407 | exit ${EXIT_ERROR_ASSERT} | |
408 | fi | |
409 | ||
410 | return ${ret} | |
411 | } | |
412 | ||
1c6a4e30 | 413 | cmd() { |
b816e04b MT |
414 | local cmd=$@ |
415 | ||
416 | log DEBUG "Running command: ${cmd}" | |
417 | ||
418 | ${cmd} | |
419 | local ret=$? | |
420 | ||
421 | log DEBUG "Returned with code '${ret}'" | |
422 | ||
423 | return ${ret} | |
424 | } | |
425 | ||
1c6a4e30 | 426 | cmd_quiet() { |
98146c00 | 427 | cmd $@ &>/dev/null |
3efecbb3 MT |
428 | } |
429 | ||
1c6a4e30 | 430 | cmd_exec() { |
f80ce052 MT |
431 | local cmd=$@ |
432 | ||
433 | log DEBUG "Exec'ing command: ${cmd}" | |
434 | ||
435 | exec ${cmd} | |
436 | ||
437 | log ERROR "Could not exec-ute: ${cmd}" | |
438 | exit ${EXIT_ERROR} | |
439 | } | |
440 | ||
1c6a4e30 | 441 | cmd_not_implemented() { |
2181765d MT |
442 | assert false "not implemented" |
443 | } | |
444 | ||
de3cecef MT |
445 | # Runs a command in a clean environment so that no confidential information |
446 | # is leaked to any untrusted commands. | |
447 | cmd_clean_environment() { | |
448 | local cmd=$@ | |
449 | ||
450 | log DEBUG "Running command in a clean environment: ${cmd}" | |
451 | env -i -- ${cmd} | |
452 | local ret=${?} | |
453 | ||
454 | log DEBUG "Returned with code '${ret}'" | |
455 | return ${ret} | |
456 | } | |
457 | ||
f5ee091e MT |
458 | # Executes the given command in background |
459 | cmd_background() { | |
460 | cmd_quiet $@ & | |
461 | } | |
462 | ||
463 | # Prints the PID of the process that was started last | |
464 | cmd_background_get_pid() { | |
465 | print "${!}" | |
466 | } | |
467 | ||
468 | cmd_background_result() { | |
469 | local pids=$@ | |
470 | ||
471 | wait ${pids} | |
472 | } | |
473 | ||
b8026986 | 474 | # Increase security of the read command |
1c6a4e30 | 475 | read() { |
b8026986 MT |
476 | builtin read -r $@ |
477 | } | |
478 | ||
1c6a4e30 | 479 | seq() { |
3efecbb3 MT |
480 | if [ $# -eq 2 ]; then |
481 | eval echo {${1}..${2}} | |
482 | elif [ $# -eq 3 ]; then | |
483 | eval echo {${1}..${3}..${2}} | |
484 | fi | |
485 | } | |
486 | ||
de72bd91 MT |
487 | range() { |
488 | eval echo {0..$(( ${1} - 1 ))} | |
489 | } | |
490 | ||
491 | count() { | |
492 | local i=0 | |
493 | ||
494 | while read; do | |
495 | ((i++)) | |
496 | done | |
497 | ||
498 | echo ${i} | |
499 | } | |
500 | ||
1c6a4e30 | 501 | which() { |
76e6cd51 MT |
502 | type -P $@ |
503 | } | |
504 | ||
fe52c5e0 | 505 | # Prints the number of seconds since epoch. |
1c6a4e30 | 506 | timestamp() { |
fe52c5e0 MT |
507 | date -u "+%s" |
508 | } | |
509 | ||
1c6a4e30 | 510 | beautify_time() { |
d82cf370 MT |
511 | local value=${1} |
512 | ||
513 | local unit | |
514 | local limit | |
515 | for unit in s m h d w; do | |
516 | case "${unit}" in | |
517 | s|m|h) | |
518 | limit=60 | |
519 | ;; | |
520 | d) | |
521 | limit=24 | |
522 | ;; | |
523 | w) | |
524 | limit=7 | |
525 | ;; | |
526 | esac | |
527 | ||
528 | [ ${value} -lt ${limit} ] && break | |
529 | ||
530 | value=$(( ${value} / ${limit} )) | |
531 | done | |
532 | ||
533 | echo "${value}${unit}" | |
534 | } | |
711ffac1 | 535 | |
1c6a4e30 | 536 | beautify_bytes() { |
711ffac1 MT |
537 | local value=${1} |
538 | ||
539 | local unit | |
540 | local limit=1024 | |
541 | for unit in B k M G T; do | |
542 | [ ${value} -lt ${limit} ] && break | |
543 | value=$(( ${value} / ${limit} )) | |
544 | done | |
545 | ||
546 | echo "${value}${unit}" | |
547 | } | |
943e3f7e | 548 | |
1c6a4e30 | 549 | module_load() { |
943e3f7e MT |
550 | local module=${1} |
551 | ||
552 | if ! grep -q "^${module}" /proc/modules; then | |
553 | log DEBUG "Loading module '${module}'." | |
554 | modprobe ${module} | |
555 | fi | |
556 | } | |
6b3f9c85 | 557 | |
1c6a4e30 | 558 | binary_exists() { |
6b3f9c85 MT |
559 | local binary=${1} |
560 | ||
561 | if [ -n "$(type -p ${binary})" ]; then | |
562 | return ${EXIT_OK} | |
563 | fi | |
564 | ||
565 | return ${EXIT_ERROR} | |
566 | } | |
d76f5107 | 567 | |
1c6a4e30 | 568 | function_exists() { |
1e6f187e MT |
569 | local function="${1}" |
570 | ||
571 | if [ "$(type -t "${function}")" = "function" ]; then | |
572 | return ${EXIT_TRUE} | |
573 | fi | |
574 | ||
575 | return ${EXIT_FALSE} | |
576 | } | |
577 | ||
1c6a4e30 | 578 | process_kill() { |
d76f5107 MT |
579 | local process=${1} |
580 | ||
581 | if ! isinteger process; then | |
582 | process=$(pidof ${process}) | |
583 | fi | |
584 | ||
585 | local pid | |
586 | local sig | |
587 | for pid in ${process}; do | |
588 | for sig in 15 9; do | |
589 | [ -d "/proc/${pid}" ] || break | |
590 | ||
591 | kill -${sig} ${pid} | |
592 | sleep 1 | |
593 | done | |
594 | done | |
595 | } | |
feb76eaf | 596 | |
1c6a4e30 | 597 | dec() { |
feb76eaf MT |
598 | local hex=${1} |
599 | ||
600 | if [ "${hex:0:2}" != "0x" ]; then | |
601 | hex="0x${hex}" | |
602 | fi | |
603 | ||
604 | printf "%d\n" "${hex}" | |
605 | } | |
3a7fef62 | 606 | |
1c6a4e30 | 607 | chr() { |
5cf0edf9 MT |
608 | local char="${1}" |
609 | ||
610 | [ ${char} -lt 256 ] || return ${EXIT_ERROR} | |
611 | ||
612 | printf "\\$(( ${char} / 64 * 100 + ${char} % 64 / 8 * 10 + ${char} % 8 ))\n" | |
613 | } | |
614 | ||
1c6a4e30 | 615 | ord() { |
5cf0edf9 MT |
616 | LC_CTYPE="C" printf "%d\n" "'${1}" |
617 | } | |
618 | ||
1c6a4e30 | 619 | hex() { |
5cf0edf9 MT |
620 | printf "%X\n" "${1}" |
621 | } | |
622 | ||
1c6a4e30 | 623 | network_is_running() { |
3a7fef62 MT |
624 | # Check, if the network service is running. |
625 | service_is_active network | |
626 | } | |
f80ce052 | 627 | |
1c6a4e30 | 628 | contains_spaces() { |
f80ce052 MT |
629 | local var="$@" |
630 | ||
631 | # Eliminate spaces. | |
632 | local var2=${var// /} | |
633 | ||
634 | if [ ${#var} -ne ${#var2} ]; then | |
635 | return ${EXIT_TRUE} | |
636 | fi | |
637 | ||
638 | return ${EXIT_FALSE} | |
639 | } | |
5cf0edf9 | 640 | |
1c6a4e30 | 641 | string_split() { |
5cf0edf9 MT |
642 | local string="$@" |
643 | ||
644 | local pos=0 | |
645 | while [ ${pos} -lt ${#string} ]; do | |
646 | print "${string:${pos}:1}" | |
647 | pos=$(( ${pos} + 1 )) | |
648 | done | |
649 | ||
650 | return ${EXIT_OK} | |
651 | } | |
652 | ||
1c6a4e30 | 653 | string_reverse() { |
5cf0edf9 MT |
654 | local string="$@" |
655 | ||
656 | local output | |
657 | local pos=0 | |
658 | while [ ${pos} -lt ${#string} ]; do | |
659 | output="${string:${pos}:1}${output}" | |
660 | pos=$(( ${pos} + 1 )) | |
661 | done | |
662 | ||
663 | print "${output}" | |
664 | return ${EXIT_OK} | |
665 | } | |
666 | ||
1c6a4e30 | 667 | dec2bin() { |
5cf0edf9 MT |
668 | local number="${1}" |
669 | ||
670 | local output | |
671 | ||
672 | local i div | |
673 | for i in 7 6 5 4 3 2 1; do | |
674 | div=$(( 2 ** ${i} )) | |
675 | ||
676 | if [ $(( ${number} / ${div} )) -eq 1 ]; then | |
677 | output="${output}1" | |
678 | else | |
679 | output="${output}0" | |
680 | fi | |
681 | number="$(( ${number} % ${div} ))" | |
682 | done | |
683 | ||
684 | if [ $(( ${number} % 2 )) -eq 1 ]; then | |
685 | output="${output}1" | |
686 | else | |
687 | output="${output}0" | |
688 | fi | |
689 | ||
690 | print "${output}" | |
691 | } | |
692 | ||
1c6a4e30 | 693 | bin2dec() { |
5cf0edf9 MT |
694 | local string="${1}" |
695 | local number=0 | |
696 | ||
697 | local pos=0 char | |
698 | while [ ${pos} -lt ${#string} ]; do | |
699 | char="${string:${pos}:1}" | |
700 | pos=$(( ${pos} + 1 )) | |
701 | ||
702 | number=$(( ${number} << 1 )) | |
703 | ||
704 | case "${char}" in | |
705 | 0) ;; | |
706 | 1) | |
707 | number=$(( ${number} + 1 )) | |
708 | ;; | |
709 | *) | |
710 | assert false "Invalid character: ${char}" | |
711 | ;; | |
712 | esac | |
713 | done | |
714 | ||
715 | print "${number}" | |
716 | return ${EXIT_OK} | |
717 | } | |
718 | ||
1c6a4e30 | 719 | char2bin() { |
5cf0edf9 MT |
720 | local dec="$(ord "${1}")" |
721 | ||
722 | dec2bin "${dec}" | |
723 | } | |
724 | ||
1c6a4e30 | 725 | bin2char() { |
5cf0edf9 MT |
726 | local dec="$(bin2dec "$@")" |
727 | ||
728 | chr "${dec}" | |
729 | } | |
730 | ||
1c6a4e30 | 731 | bin2hex() { |
5cf0edf9 MT |
732 | local dec="$(bin2dec "$@")" |
733 | ||
734 | dec2hex "${dec}" | |
735 | } | |
736 | ||
1c6a4e30 | 737 | hex2bin() { |
5cf0edf9 MT |
738 | local dec="$(hex2dec "$@")" |
739 | ||
740 | dec2bin "${dec}" | |
741 | } | |
742 | ||
1c6a4e30 | 743 | hex2dec() { |
5cf0edf9 MT |
744 | local hex="${1}" |
745 | ||
746 | # Prepend 0x if necessary. | |
747 | [ "${hex:0:2}" = "0x" ] || hex="0x${hex}" | |
748 | ||
749 | printf "%d\n" "${hex}" | |
750 | } | |
751 | ||
1c6a4e30 | 752 | dec2hex() { |
5cf0edf9 MT |
753 | printf "%02x\n" "${1}" |
754 | } |