forked from BrodieRobertson/scripts
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathpfetch
executable file
·1455 lines (1292 loc) · 46 KB
/
pfetch
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#!/bin/sh
#
# pfetch - Simple POSIX sh fetch script.
log() {
# The 'log()' function handles the printing of information.
# In 'pfetch' (and 'neofetch'!) the printing of the ascii art and info
# happen independently of each other.
#
# The size of the ascii art is stored and the ascii is printed first.
# Once the ascii is printed, the cursor is located right below the art
# (See marker $[1]).
#
# Using the stored ascii size, the cursor is then moved to marker $[2].
# This is simply a cursor up escape sequence using the "height" of the
# ascii art.
#
# 'log()' then moves the cursor to the right the "width" of the ascii art
# with an additional amount of padding to add a gap between the art and
# the information (See marker $[3]).
#
# When 'log()' has executed, the cursor is then located at marker $[4].
# When 'log()' is run a second time, the next line of information is
# printed, moving the cursor to marker $[5].
#
# Markers $[4] and $[5] repeat all the way down through the ascii art
# until there is no more information left to print.
#
# Every time 'log()' is called the script keeps track of how many lines
# were printed. When printing is complete the cursor is then manually
# placed below the information and the art according to the "heights"
# of both.
#
# The math is simple: move cursor down $((ascii_height - info_height)).
# If the aim is to move the cursor from marker $[5] to marker $[6],
# plus the ascii height is 8 while the info height is 2 it'd be a move
# of 6 lines downwards.
#
# However, if the information printed is "taller" (takes up more lines)
# than the ascii art, the cursor isn't moved at all!
#
# Once the cursor is at marker $[6], the script exits. This is the gist
# of how this "dynamic" printing and layout works.
#
# This method allows ascii art to be stored without markers for info
# and it allows for easy swapping of info order and amount.
#
# $[2] ___ $[3] goldie@KISS
# $[4](.· | $[5] os KISS Linux
# (<> |
# / __ \
# ( / \ /|
# _/\ __)/_)
# \/-____\/
# $[1]
#
# $[6] /home/goldie $
# End here if no data was found.
[ "$2" ] || return
# Store the value of '$1' as we reset the argument list below.
name=$1
# Use 'set --' as a means of stripping all leading and trailing
# white-space from the info string. This also normalizes all
# white-space inside of the string.
#
# Disable the shellcheck warning for word-splitting
# as it's safe and intended ('set -f' disables globbing).
# shellcheck disable=2046,2086
{
set -f
set +f -- $2
info=$*
}
# Move the cursor to the right, the width of the ascii art with an
# additional gap for text spacing.
printf '[%sC' "${ascii_width--1}"
# Print the info name and color the text.
printf '[3%s;1m%s[m' "${PF_COL1-4}" "$name"
# Print the info name and info data separator.
printf '%s' "$PF_SEP"
# Move the cursor backward the length of the *current* info name and
# then move it forwards the length of the *longest* info name. This
# aligns each info data line.
printf '[%sD[%sC' "${#name}" "${PF_ALIGN-$info_length}"
# Print the info data, color it and strip all leading whitespace
# from the string.
printf '[3%sm%s[m\n' "${PF_COL2-7}" "$info"
# Keep track of the number of times 'log()' has been run.
info_height=$((${info_height:-0} + 1))
}
get_title() {
# Username is retrieved by first checking '$USER' with a fallback
# to the 'id -un' command.
user=${USER:-$(id -un)}
# Hostname is retrieved by first checking '$HOSTNAME' with a fallback
# to the 'hostname' command.
#
# Disable the warning about '$HOSTNAME' being undefined in POSIX sh as
# the intention for using it is allowing the user to overwrite the
# value on invocation.
# shellcheck disable=SC2039
hostname=${HOSTNAME:-${hostname:-$(hostname)}}
log "[3${PF_COL3:-1}m${user}${c7}@[3${PF_COL3:-1}m${hostname}" " " >&6
}
get_os() {
# This function is called twice, once to detect the distribution name
# for the purposes of picking an ascii art early and secondly to display
# the distribution name in the info output (if enabled).
#
# On first run, this function displays _nothing_, only on the second
# invocation is 'log()' called.
[ "$distro" ] && {
log os "$distro" >&6
return
}
case $os in
Linux*)
# Some Linux distributions (which are based on others)
# fail to identify as they **do not** change the upstream
# distributions identification packages or files.
#
# It is senseless to add a special case in the code for
# each and every distribution (which _is_ technically no
# different from what it is based on) as they're either too
# lazy to modify upstream's identification files or they
# don't have the know-how (or means) to ship their own
# lsb-release package.
#
# This causes users to think there's a bug in system detection
# tools like neofetch or pfetch when they technically *do*
# function correctly.
#
# Exceptions are made for distributions which are independent,
# not based on another distribution or follow different
# standards.
#
# This applies only to distributions which follow the standard
# by shipping unmodified identification files and packages
# from their respective upstreams.
if command -v lsb_release; then
distro=$(lsb_release -sd)
# Android detection works by checking for the existence of
# the follow two directories. I don't think there's a simpler
# method than this.
elif [ -d /system/app ] && [ -d /system/priv-app ]; then
distro="Android $(getprop ro.build.version.release)"
else
# This used to be a simple '. /etc/os-release' but I believe
# this is insecure as we blindly executed whatever was in the
# file. This parser instead simply handles 'key=val', treating
# the file contents as plain-text.
while IFS='=' read -r key val; do
case $key in
PRETTY_NAME) distro=$val ;;
esac
done < /etc/os-release
fi
# 'os-release' and 'lsb_release' sometimes add quotes
# around the distribution name, strip them.
distro=${distro##[\"\']}
distro=${distro%%[\"\']}
# Special cases for (independent) distributions which
# don't follow any os-release/lsb standards whatsoever.
command -v crux && distro=$(crux)
command -v guix && distro='Guix System'
# Check to see if Linux is running in Windows 10 under
# WSL1 (Windows subsystem for Linux [version 1]) and
# append a string accordingly.
#
# If the kernel version string ends in "-Microsoft",
# we're very likely running under Windows 10 in WSL1.
[ "${kernel%%*-Microsoft}" ] ||
distro="$distro on Windows 10 [WSL1]"
# Check to see if Linux is running in Windows 10 under
# WSL2 (Windows subsystem for Linux [version 2]) and
# append a string accordingly.
#
# This checks to see if '$WSLENV' is defined. This
# appends the Windows 10 string even if '$WSLENV' is
# empty. We only need to check that is has been _exported_.
distro="${distro}${WSLENV+ on Windows 10 [WSL2]}"
;;
Darwin*)
# Parse the SystemVersion.plist file to grab the macOS
# version. The file is in the following format:
#
# <key>ProductVersion</key>
# <string>10.14.6</string>
#
# 'IFS' is set to '<>' to enable splitting between the
# keys and a second 'read' is used to operate on the
# next line directly after a match.
#
# '_' is used to nullify a field. '_ _ line _' basically
# says "populate $line with the third field's contents".
while IFS='<>' read -r _ _ line _; do
case $line in
# Match 'ProductVersion' and read the next line
# directly as it contains the key's value.
ProductVersion)
IFS='<>' read -r _ _ mac_version _
break
;;
esac
done < /System/Library/CoreServices/SystemVersion.plist
# Use the ProductVersion to determine which macOS/OS X codename
# the system has. As far as I'm aware there's no "dynamic" way
# of grabbing this information.
case $mac_version in
10.4*) distro='Mac OS X Tiger' ;;
10.5*) distro='Mac OS X Leopard' ;;
10.6*) distro='Mac OS X Snow Leopard' ;;
10.7*) distro='Mac OS X Lion' ;;
10.8*) distro='OS X Mountain Lion' ;;
10.9*) distro='OS X Mavericks' ;;
10.10*) distro='OS X Yosemite' ;;
10.11*) distro='OS X El Capitan' ;;
10.12*) distro='macOS Sierra' ;;
10.13*) distro='macOS High Sierra' ;;
10.14*) distro='macOS Mojave' ;;
10.15*) distro='macOS Catalina' ;;
*) distro='macOS' ;;
esac
distro="$distro $mac_version"
;;
Haiku)
# Haiku uses 'uname -v' for version information
# instead of 'uname -r' which only prints '1'.
distro=$(uname -sv)
;;
Minix|DragonFly)
distro="$os $kernel"
# Minix and DragonFly don't support the escape
# sequences used, clear the exit trap.
trap '' EXIT
;;
SunOS)
# Grab the first line of the '/etc/release' file
# discarding everything after '('.
IFS='(' read -r distro _ < /etc/release
;;
*)
# Catch all to ensure '$distro' is never blank.
# This also handles the BSDs.
distro="$os $kernel"
;;
esac
}
get_kernel() {
case $os in
# Don't print kernel output on some systems as the
# OS name includes it.
*BSD*|Haiku|Minix) ;;
*)
# '$kernel' is the cached output of 'uname -r'.
log kernel "$kernel" >&6
;;
esac
}
get_host() {
case $os in
Linux*)
# Despite what these files are called, version doesn't
# always contain the version nor does name always contain
# the name.
read -r name < /sys/devices/virtual/dmi/id/product_name
read -r version < /sys/devices/virtual/dmi/id/product_version
read -r model < /sys/firmware/devicetree/base/model
host="$name $version $model"
;;
Darwin*|FreeBSD*|DragonFly*)
host=$(sysctl -n hw.model)
;;
NetBSD*)
host=$(sysctl -n machdep.dmi.system-vendor \
machdep.dmi.system-product)
;;
*BSD*)
host=$(sysctl -n hw.vendor hw.product)
;;
esac
# Turn the host string into an argument list so we can iterate
# over it and remove OEM strings and other information which
# shouldn't be displayed.
#
# Disable the shellcheck warning for word-splitting
# as it's safe and intended ('set -f' disables globbing).
# shellcheck disable=2046,2086
{
set -f
set +f -- $host
host=
}
# Iterate over the host string word by word as a means of stripping
# unwanted and OEM information from the string as a whole.
#
# This could have been implemented using a long 'sed' command with
# a list of word replacements, however I want to show that something
# like this is possible in pure sh.
#
# This string reconstruction is needed as some OEMs either leave the
# identification information as "To be filled by OEM", "Default",
# "undefined" etc and we shouldn't print this to the screen.
for word; do
# This works by reconstructing the string by excluding words
# found in the "blacklist" below. Only non-matches are appended
# to the final host string.
case $word in
To | [Bb]e | [Ff]illed | [Bb]y | O.E.M. | OEM |\
Not | Applicable | Specified | System | Product | Name |\
Version | Undefined | Default | string | INVALID | � | os )
continue
;;
esac
host="$host$word "
done
# '$arch' is the cached output from 'uname -m'.
log host "${host:-$arch}" >&6
}
get_uptime() {
# Uptime works by retrieving the data in total seconds and then
# converting that data into days, hours and minutes using simple
# math.
case $os in
Linux*|Minix*)
IFS=. read -r s _ < /proc/uptime
;;
Darwin*|*BSD*|DragonFly*)
s=$(sysctl -n kern.boottime)
# Extract the uptime in seconds from the following output:
# [...] { sec = 1271934886, usec = 667779 } Thu Apr 22 12:14:46 2010
s=${s#*=}
s=${s%,*}
# The uptime format from 'sysctl' needs to be subtracted from
# the current time in seconds.
s=$(($(date +%s) - s))
;;
Haiku)
# The boot time is returned in microseconds, convert it to
# regular seconds.
s=$(($(system_time) / 1000000))
;;
SunOS)
# Split the output of 'kstat' on '.' and any white-space
# which exists in the command output.
#
# The output is as follows:
# unix:0:system_misc:snaptime 14809.906993005
#
# The parser extracts: ^^^^^
IFS=' .' read -r _ s _ <<-EOF
$(kstat -p unix:0:system_misc:snaptime)
EOF
;;
esac
# Convert the uptime from seconds into days, hours and minutes.
d=$((s / 60 / 60 / 24))
h=$((s / 60 / 60 % 24))
m=$((s / 60 % 60))
# Only append days, hours and minutes if they're non-zero.
[ "$d" = 0 ] || uptime="${uptime}${d}d "
[ "$h" = 0 ] || uptime="${uptime}${h}h "
[ "$m" = 0 ] || uptime="${uptime}${m}m "
log uptime "${uptime:-0m}" >&6
}
get_pkgs() {
# This is just a simple wrapper around 'command -v' to avoid
# spamming '>/dev/null' throughout this function.
has() { command -v "$1" >/dev/null; }
# This works by first checking for which package managers are
# installed and finally by printing each package manager's
# package list with each package one per line.
#
# The output from this is then piped to 'wc -l' to count each
# line, giving us the total package count of whatever package
# managers are installed.
#
# Backticks are *required* here as '/bin/sh' on macOS is
# 'bash 3.2' and it can't handle the following:
#
# var=$(
# code here
# )
#
# shellcheck disable=2006
packages=`
case $os in
Linux*)
# Commands which print packages one per line.
has bonsai && bonsai list
has crux && pkginfo -i
has pacman-key && pacman -Qq
has dpkg && dpkg-query -f '.\n' -W
has rpm && rpm -qa
has xbps-query && xbps-query -l
has apk && apk info
has guix && guix package --list-installed
has opkg && opkg list-installed
# Directories containing packages.
has kiss && printf '%s\n' /var/db/kiss/installed/*/
has brew && printf '%s\n' "$(brew --cellar)/"*
has emerge && printf '%s\n' /var/db/pkg/*/*/
has pkgtool && printf '%s\n' /var/log/packages/*
# 'nix' requires two commands.
has nix-store && {
nix-store -q --requisites /run/current-system/sw
nix-store -q --requisites ~.nix-profile
}
;;
Darwin*)
# Commands which print packages one per line.
has pkgin && pkgin list
# Directories containing packages.
has brew && printf '%s\n' /usr/local/Cellar/*
# 'port' prints a single line of output to 'stdout'
# when no packages are installed and exits with
# success causing a false-positive of 1 package
# installed.
#
# 'port' should really exit with a non-zero code
# in this case to allow scripts to cleanly handle
# this behavior.
has port && {
pkg_list=$(port installed)
[ "$pkg_list" = "No ports are installed." ] ||
printf '%s\n' "$pkg_list"
}
;;
FreeBSD*|DragonFly*)
pkg info
;;
OpenBSD*)
printf '%s\n' /var/db/pkg/*/
;;
NetBSD*)
pkg_info
;;
Haiku)
printf '%s\n' /boot/system/package-links/*
;;
Minix)
printf '%s\n' /usr/pkg/var/db/pkg/*/
;;
SunOS)
has pkginfo && pkginfo -i
has pkg && pkg list
;;
esac | wc -l
`
[ "$packages" -gt 1 ] && log pkgs "$packages" >&6
}
get_memory() {
case $os in
# Used memory is calculated using the following "formula":
# MemUsed = MemTotal + Shmem - MemFree - Buffers - Cached - SReclaimable
# Source: https://github.com/KittyKatt/screenFetch/issues/386
Linux*)
# Parse the '/proc/meminfo' file splitting on ':' and 'k'.
# The format of the file is 'key: 000kB' and an additional
# split is used on 'k' to filter out 'kB'.
while IFS=':k ' read -r key val _; do
case $key in
MemTotal)
mem_used=$((mem_used + val))
mem_full=$val
;;
Shmem)
mem_used=$((mem_used + val))
;;
MemFree|Buffers|Cached|SReclaimable)
mem_used=$((mem_used - val))
;;
esac
done < /proc/meminfo
mem_used=$((mem_used / 1024))
mem_full=$((mem_full / 1024))
;;
# Used memory is calculated using the following "formula":
# (wired + active + occupied) * 4 / 1024
Darwin*)
mem_full=$(($(sysctl -n hw.memsize) / 1024 / 1024))
# Parse the 'vmstat' file splitting on ':' and '.'.
# The format of the file is 'key: 000.' and an additional
# split is used on '.' to filter it out.
while IFS=:. read -r key val; do
case $key in
*' wired'*|*' active'*|*' occupied'*)
mem_used=$((mem_used + ${val:-0}))
;;
esac
# Using '<<-EOF' is the only way to loop over a command's
# output without the use of a pipe ('|').
# This ensures that any variables defined in the while loop
# are still accessible in the script.
done <<-EOF
$(vm_stat)
EOF
mem_used=$((mem_used * 4 / 1024))
;;
OpenBSD*)
mem_full=$(($(sysctl -n hw.physmem) / 1024 / 1024))
# This is a really simpler parser for 'vmstat' which grabs
# the used memory amount in a lazy way. 'vmstat' prints 3
# lines of output with the needed value being stored in the
# final line.
#
# This loop simply grabs the 3rd element of each line until
# the EOF is reached. Each line overwrites the value of the
# previous one so we're left with what we wanted. This isn't
# slow as only 3 lines are parsed.
while read -r _ _ line _; do
mem_used=${line%%M}
# Using '<<-EOF' is the only way to loop over a command's
# output without the use of a pipe ('|').
# This ensures that any variables defined in the while loop
# are still accessible in the script.
done <<-EOF
$(vmstat)
EOF
;;
# Used memory is calculated using the following "formula":
# mem_full - ((inactive + free + cache) * page_size / 1024)
FreeBSD*|DragonFly*)
mem_full=$(($(sysctl -n hw.physmem) / 1024 / 1024))
# Use 'set --' to store the output of the command in the
# argument list. POSIX sh has no arrays but this is close enough.
#
# Disable the shellcheck warning for word-splitting
# as it's safe and intended ('set -f' disables globbing).
# shellcheck disable=2046
{
set -f
set +f -- $(sysctl -n hw.pagesize \
vm.stats.vm.v_inactive_count \
vm.stats.vm.v_free_count \
vm.stats.vm.v_cache_count)
}
# Calculate the amount of used memory.
# $1: hw.pagesize
# $2: vm.stats.vm.v_inactive_count
# $3: vm.stats.vm.v_free_count
# $4: vm.stats.vm.v_cache_count
mem_used=$((mem_full - (($2 + $3 + $4) * $1 / 1024 / 1024)))
;;
NetBSD*)
mem_full=$(($(sysctl -n hw.physmem64) / 1024 / 1024))
# NetBSD implements a lot of the Linux '/proc' filesystem,
# this uses the same parser as the Linux memory detection.
while IFS=':k ' read -r key val _; do
case $key in
MemFree)
mem_free=$((val / 1024))
break
;;
esac
done < /proc/meminfo
mem_used=$((mem_full - mem_free))
;;
Haiku)
# Read the first line of 'sysinfo -mem' splitting on
# '(', ' ', and ')'. The needed information is then
# stored in the 5th and 7th elements. Using '_' "consumes"
# an element allowing us to proceed to the next one.
#
# The parsed format is as follows:
# 3501142016 bytes free (used/max 792645632 / 4293787648)
IFS='( )' read -r _ _ _ _ mem_used _ mem_full <<-EOF
$(sysinfo -mem)
EOF
mem_used=$((mem_used / 1024 / 1024))
mem_full=$((mem_full / 1024 / 1024))
;;
Minix)
# Minix includes the '/proc' filesystem though the format
# differs from Linux. The '/proc/meminfo' file is only a
# single line with space separated elements and elements
# 2 and 3 contain the total and free memory numbers.
read -r _ mem_full mem_free _ < /proc/meminfo
mem_used=$(((mem_full - mem_free) / 1024))
mem_full=$(( mem_full / 1024))
;;
SunOS)
hw_pagesize=$(pagesize)
# 'kstat' outputs memory in the following format:
# unix:0:system_pages:pagestotal 1046397
# unix:0:system_pages:pagesfree 885018
#
# This simply uses the first "element" (white-space
# separated) as the key and the second element as the
# value.
#
# A variable is then assigned based on the key.
while read -r key val; do
case $key in
*total) pages_full=$val ;;
*free) pages_free=$val ;;
esac
done <<-EOF
$(kstat -p unix:0:system_pages:pagestotal \
unix:0:system_pages:pagesfree)
EOF
mem_full=$((pages_full * hw_pagesize / 1024 / 1024))
mem_free=$((pages_free * hw_pagesize / 1024 / 1024))
mem_used=$((mem_full - mem_free))
;;
esac
log memory "${mem_used:-?}M / ${mem_full:-?}M" >&6
}
get_wm() {
case $os in
# Don't display window manager on macOS.
Darwin*) ;;
*)
# xprop can be used to grab the window manager's properties
# which contains the window manager's name under '_NET_WM_NAME'.
#
# The upside to using 'xprop' is that you don't need to hardcode
# a list of known window manager names. The downside is that
# not all window managers conform to setting the '_NET_WM_NAME'
# atom..
#
# List of window managers which fail to set the name atom:
# catwm, fvwm, dwm, 2bwm, monster, wmaker and sowm [mine! ;)].
#
# The final downside to this approach is that it does _not_
# support Wayland environments. The only solution which supports
# Wayland is the 'ps' parsing mentioned below.
#
# A more naive implementation is to parse the last line of
# '~/.xinitrc' to extract the second white-space separated
# element.
#
# The issue with an approach like this is that this line data
# does not always equate to the name of the window manager and
# could in theory be _anything_.
#
# This also fails when the user launches xorg through a display
# manager or other means.
#
#
# Another naive solution is to parse 'ps' with a hardcoded list
# of window managers to detect the current window manager (based
# on what is running).
#
# The issue with this approach is the need to hardcode and
# maintain a list of known window managers.
#
# Another issue is that process names do not always equate to
# the name of the window manager. False-positives can happen too.
#
# This is the only solution which supports Wayland based
# environments sadly. It'd be nice if some kind of standard were
# established to identify Wayland environments.
#
# pfetch's goal is to remain _simple_, if you'd like a "full"
# implementation of window manager detection use 'neofetch'.
#
# Neofetch use a combination of 'xprop' and 'ps' parsing to
# support all window managers (including non-conforming and
# Wayland) though it's a lot more complicated!
# Don't display window manager if X isn't running.
[ "$DISPLAY" ] || return
# This is a two pass call to xprop. One call to get the window
# manager's ID and another to print its properties.
command -v xprop && {
# The output of the ID command is as follows:
# _NET_SUPPORTING_WM_CHECK: window id # 0x400000
#
# To extract the ID, everything before the last space
# is removed.
id=$(xprop -root -notype _NET_SUPPORTING_WM_CHECK)
id=${id##* }
# The output of the property command is as follows:
# _NAME 8t
# _NET_WM_PID = 252
# _NET_WM_NAME = "bspwm"
# _NET_SUPPORTING_WM_CHECK: window id # 0x400000
# WM_CLASS = "wm", "Bspwm"
#
# To extract the name, everything before '_NET_WM_NAME = \"'
# is removed and everything after the next '"' is removed.
wm=$(xprop -id "$id" -notype -len 25 -f _NET_WM_NAME 8t)
# Handle cases of a window manager _not_ populating the
# '_NET_WM_NAME' atom. Display nothing in this case.
case $wm in
*'_NET_WM_NAME = '*)
wm=${wm##*_NET_WM_NAME = \"}
wm=${wm%%\"*}
;;
*)
# Fallback to checking the process list
# for the select few window managers which
# don't set '_NET_WM_NAME'.
#
# TODO: This is currently limited to 'grep'
# implementations providing the '-o'
# flag. This needs to be replaced with
# a command which searches for a list
# of strings and returns _only_ the
# first match's contents (also ensuring
# the search itself isn't matched).
#
# A generic parser isn't possible as
# the output of 'ps' is _not_ the same
# between implementations and across
# operating systems.
#
# The simple search method above works
# regardless of 'ps' implementation.
#
# Disable the shellcheck warning about using
# 'pgrep' instead of 'ps | grep' as 'pgrep'
# is not always available.
# shellcheck disable=2009
wm=$(ps x | grep -o \
-e '[c]atwm' \
-e '[f]vwm' \
-e '[d]wm' \
-e '[2]bwm' \
-e '[m]onsterwm' \
-e '[w]maker' \
-e '[s]owm')
;;
esac
}
;;
esac
log wm "$wm" >&6
}
get_de() {
# This only supports Xorg related desktop environments though
# this is fine as knowing the desktop envrionment on Windows,
# macOS etc is useless (they'll always report the same value).
#
# Display the value of '$XDG_CURRENT_DESKTOP', if it's empty,
# display the value of '$DESKTOP_SESSION'.
log de "${XDG_CURRENT_DESKTOP:-$DESKTOP_SESSION}" >&6
}
get_shell() {
# Display the basename of the '$SHELL' environment variable.
log shell "${SHELL##*/}" >&6
}
get_editor() {
# Display the value of '$VISUAL', if it's empty, display the
# value of '$EDITOR'.
log editor "${VISUAL:-$EDITOR}" >&6
}
get_palette() {
# Print the first 8 terminal colors. This uses the existing
# sequences to change text color with a sequence prepended
# to reverse the foreground and background colors.
#
# This allows us to save hardcoding a second set of sequences
# for background colors.
palette=" [7m$c1 $c2 $c3 $c4 $c5 $c6 $c7 "
# Print the palette with a newline before and after.
# The '\033[%sC' moves the text to the right, the
# length of the ascii art.
printf '\n[%sC%s[m\n' "${ascii_width-1}" "$palette" >&6
}
get_ascii() {
# This is a simple function to read the contents of
# an ascii file from 'stdin'. It allows for the use
# of '<<-EOF' to prevent the break in indentation in
# this source code.
#
# This function also sets the text colors according
# to the ascii color.
read_ascii() {
# 'PF_COL1': Set the info name color according to ascii color.
# 'PF_COL3': Set the title color to some other color. ¯\_(ツ)_/¯
PF_COL1=${PF_COL1:-${1:-7}}
PF_COL3=${PF_COL3:-$((${1:-7}%8+1))}
# POSIX sh has no 'var+=' so 'var=${var}append' is used. What's
# interesting is that 'var+=' _is_ supported inside '$(())'
# (arithmetic) though there's no support for 'var++/var--'.
#
# There is also no $'\n' to add a "literal"(?) newline to the
# string. The simplest workaround being to break the line inside
# the string (though this has the caveat of breaking indentation).
while IFS= read -r line; do
ascii="$ascii$line
"
done
}
# This checks for ascii art in the following order:
# '$1': Argument given to 'get_ascii()' directly.
# '$PF_ASCII': Environment variable set by user.
# '$distro': The detected distribution name.
# '$os': The name of the operating system/kernel.
#
# NOTE: Each ascii art below is indented using tabs, this
# allows indentation to continue naturally despite
# the use of '<<-EOF'.
case ${1:-${PF_ASCII:-${distro:-$os}}} in
[Aa]lpine*)
read_ascii 4 <<-EOF
${c4} /\\ /\\
/${c7}/ ${c4}\\ \\
/${c7}/ ${c4}\\ \\
/${c7}// ${c4}\\ \\
${c7}// ${c4}\\ \\
\\
EOF
;;
[Aa]ndroid*)
read_ascii 2 <<-EOF
${c2} ;, ,;
';,.-----.,;'
,' ',
/ O O \\
| |
'-----------------'
EOF
;;
[Aa]rch*)
read_ascii 4 <<-EOF
${c6} /\\
/ \\
/\\ \\
${c4} / \\
/ ,, \\
/ | | -\\
/_-'' ''-_\\
EOF
;;
[Aa]rco*)
read_ascii 4 <<-EOF
${c4} /\\
/ \\
/ /\\ \\
/ / \\ \\
/ / \\ \\
/ / _____\\ \\
/_/ \`----.\\_\\
EOF
;;
[Aa]rtix*)
read_ascii 6 <<-EOF
${c4} /\\
/ \\
/\`'.,\\
/ ',
/ ,\`\\
/ ,.'\`. \\
/.,'\` \`'.\\
EOF
;;
[Cc]ent[Oo][Ss]*)
read_ascii 5 <<-EOF
${c2} ____${c3}^${c5}____
${c2} |\\ ${c3}|${c5} /|
${c2} | \\ ${c3}|${c5} / |
${c5}<---- ${c4}---->
${c4} | / ${c2}|${c3} \\ |
${c4} |/__${c2}|${c3}__\\|
${c2} v
EOF
;;
[Dd]ebian*)
read_ascii 1 <<-EOF
${c1} _____
/ __ \\
| / |
| \\___-
-_
--_
EOF
;;
[Dd]ragon[Ff]ly*)
read_ascii 1 <<-EOF
,${c1}_${c7},
('-_${c1}|${c7}_-')
>--${c1}|${c7}--<
(_-'${c1}|${c7}'-_)
${c1}|
|
|
EOF
;;
[Ee]lementary*)
read_ascii <<-EOF
${c7} _______
/ ____ \\
/ | / /\\
|__\\ / / |
\\ /__/ /