K4 Kindle4 "Date -d" use?

jj1705 · 10-18-2023, 12:57 PM

For the life of me, I can't seem to get the date command to work with either the -d or --date arguments to give me the epoch time for a future date. Do I need a new version of the date binary? I'm guessing the version of the binary on the kindle doesn't support this argument?

This works:
TODAY=$(date +"%Y-%m-%d")
CURRENT_TIME=$(date +%s)

These just return a blank string:
TMP_A=$(date +%s -d "Fri Apr 24 13:14:15 2023")
TMP_B=$(date +%s -d "2023-10-17 06:00")
TMP_C=$(date -d "tomorrow 06:00" +"%s")
TMP_D=$(date -d "Oct 21 1973" +'%s')
TMP_E=$(date +%s -d "Fri Apr 24 13:14:39 CDT 2009")
TMP_F=$(date --date "today 17:00" +%s)

NiLuJe · 10-23-2023, 08:42 PM

The fancier native language ones are definitely not supported, but the basics *ought* to work.

c.f., https://git.busybox.net/busybox/tree...ls/date.c#n113

I haven't double-checked on a device, but this code seems to have been in there for a while, so there's a chance it made it into the prehistoric busybox version shipped on a K4

.

NiLuJe · 10-23-2023, 08:45 PM

i.e., on a sane busybox version, the only variant accepted would be the one from `TMP_B`, the rest reports "invalid date: <blah>"

jj1705 · 11-14-2023, 10:43 PM

Thanks. I'll have to check it out, but last time I ran that code, all of those TMP variables just returned a blank string. I can see the line of code you referenced so I can tinker some more.

TBH, I hit my head against the wall enough times than I took a break for my own sanity!

10-18-2023, 12:57 PM	#1
jj1705 Junior Member Posts: 2 Karma: 10 Join Date: Oct 2023 Device: Kindle4	Kindle4 "Date -d" use? For the life of me, I can't seem to get the date command to work with either the -d or --date arguments to give me the epoch time for a future date. Do I need a new version of the date binary? I'm guessing the version of the binary on the kindle doesn't support this argument? This works: TODAY=$(date +"%Y-%m-%d") CURRENT_TIME=$(date +%s) These just return a blank string: TMP_A=$(date +%s -d "Fri Apr 24 13:14:15 2023") TMP_B=$(date +%s -d "2023-10-17 06:00") TMP_C=$(date -d "tomorrow 06:00" +"%s") TMP_D=$(date -d "Oct 21 1973" +'%s') TMP_E=$(date +%s -d "Fri Apr 24 13:14:39 CDT 2009") TMP_F=$(date --date "today 17:00" +%s)

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10-23-2023, 08:42 PM	#2
NiLuJe BLAM! Posts: 13,506 Karma: 26047202 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	The fancier native language ones are definitely not supported, but the basics ought to work. c.f., https://git.busybox.net/busybox/tree...ls/date.c#n113 I haven't double-checked on a device, but this code seems to have been in there for a while, so there's a chance it made it into the prehistoric busybox version shipped on a K4 .

10-23-2023, 08:45 PM	#3
NiLuJe BLAM! Posts: 13,506 Karma: 26047202 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	i.e., on a sane busybox version, the only variant accepted would be the one from `TMP_B`, the rest reports "invalid date: <blah>"

11-14-2023, 10:43 PM	#4
jj1705 Junior Member Posts: 2 Karma: 10 Join Date: Oct 2023 Device: Kindle4	Thanks. I'll have to check it out, but last time I ran that code, all of those TMP variables just returned a blank string. I can see the line of code you referenced so I can tinker some more. TBH, I hit my head against the wall enough times than I took a break for my own sanity!

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