The nano editor won't start if "$TERM=xterm"

[numericOverflow]

• exact camera hardware: Wyze v2

• Click to show startup log & CPU details

  ``` Contents of dmesg after startup: 0.000000 Initializing cgroup subsys cpu 0.000000 Initializing cgroup subsys cpuacct 0.000000 Linux version 3.10.14 (root@ubuntu) (gcc version 4.7.2 (Ingenic r2.3.3 2016.12) ) #21 PREEMPT Thu Oct 19 11:38:16 CST 2017 0.000000 bootconsole [early0] enabled 0.000000 CPU0 RESET ERROR PC:801CB660 0.000000 [<801cb660>] __delay+0x0/0x10 0.000000 CPU0 revision is: 00d00101 (Ingenic Xburst) 0.000000 FPU revision is: 00b70000 0.000000 cgu_get_rate, parent = 860160000, rate = 0, m = 0, n = 0, reg val = 0x000020ff 0.000000 CCLK:860MHz L2CLK:430Mhz H0CLK:200MHz H2CLK:200Mhz PCLK:100Mhz 0.000000 Determined physical RAM map: 0.000000 memory: 00535000 @ 00010000 (usable) 0.000000 memory: 0003b000 @ 00545000 (usable after init) 0.000000 User-defined physical RAM map: 0.000000 memory: 06800000 @ 00000000 (usable) 0.000000 Zone ranges: 0.000000 Normal [mem 0x00000000-0x067fffff] 0.000000 Movable zone start for each node 0.000000 Early memory node ranges 0.000000 node 0: [mem 0x00000000-0x067fffff] 0.000000 On node 0 totalpages: 26624 0.000000 free_area_init_node: node 0, pgdat 80541cb0, node_mem_map 81000000 0.000000 Normal zone: 208 pages used for memmap 0.000000 Normal zone: 0 pages reserved 0.000000 Normal zone: 26624 pages, LIFO batch:7 0.000000 Primary instruction cache 32kB, 8-way, VIPT, linesize 32 bytes. 0.000000 Primary data cache 32kB, 8-way, VIPT, no aliases, linesize 32 bytes 0.000000 pls check processor_id[0x00d00101],sc_jz not support! 0.000000 MIPS secondary cache 128kB, 8-way, linesize 32 bytes. 0.000000 pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768 0.000000 pcpu-alloc: [0] 0 0.000000 Built 1 zonelists in Zone order, mobility grouping off. Total pages: 26416 0.000000 Kernel command line: console=ttyS1,115200n8 mem=104M@0x0 ispmem=8M@0x6800000 rmem=16M@0x7000000 init=/linuxrc rootfstype=squashfs root=/dev/mtdblock2 rw mtdparts=jz_sfc:256k(boot),2048k(kernel),3392k(root),640k(driver),4736k(appfs),2048k(backupk),640k(backupd),2048k(backupa),256k(config),256k(para),-(flag) 0.000000 PID hash table entries: 512 (order: -1, 2048 bytes) 0.000000 Dentry cache hash table entries: 16384 (order: 4, 65536 bytes) 0.000000 Inode-cache hash table entries: 8192 (order: 3, 32768 bytes) 0.000000 Memory: 99300k/106496k available (4024k kernel code, 7196k reserved, 1304k data, 236k init, 0k highmem) 0.000000 SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 0.000000 Preemptible hierarchical RCU implementation. 0.000000 NR_IRQS:418 0.000000 clockevents_config_and_register success. 0.000024 Calibrating delay loop... 858.52 BogoMIPS (lpj=4292608) 0.087754 pid_max: default: 32768 minimum: 301 0.092738 Mount-cache hash table entries: 512 0.097841 Initializing cgroup subsys debug 0.102102 Initializing cgroup subsys freezer 0.109178 regulator-dummy: no parameters 0.113467 NET: Registered protocol family 16 0.135474 bio: create slab at 0 0.141800 jz-dma jz-dma: JZ SoC DMA initialized 0.147062 SCSI subsystem initialized ```

• the Xiaomi-Dafang-Hacks commitid (from git log) you are experiencing the issue with:

I just pulled the main branch as of 2022-05-09 (last commit listed as 0cde105 on Dec 5, 2021)

Description

nano will not work/start, exits immediately after calling the exe:

[root@webcam05:sdcard]# nano
Error opening terminal: xterm.
[root@webcam05:sdcard]#

The nano editor does not start, exits with the above message. FWIW, the nano --help command does display the help info correctly (I only pasted partial output here for reference)

[root@webcam05:sdcard]# nano --help
Usage: nano [OPTIONS] [[+LINE[,COLUMN]] FILE]...

To place the cursor on a specific line of a file, put the line number with
a '+' before the filename.  The column number can be added after a comma.
When a filename is '-', nano reads data from standard input.

 Option         Long option             Meaning
 -A             --smarthome             Enable smart home key
 -B             --backup                Save backups of existing files
 -C <dir>       --backupdir=<dir>       Directory for saving unique backup files
 -D             --boldtext              Use bold instead of reverse video text
 -E             --tabstospaces          Convert typed tabs to spaces
...
...
...

What did you do to debug the issue

[root@webcam05:sdcard]# echo $TERM
xterm
[root@webcam05:sdcard]# export TERM=xterm-256color
[root@webcam05:sdcard]# echo $TERM
xterm-256color
[root@webcam05:sdcard]# nano
---Nano opens now as expected!---
[root@webcam05:sdcard]#

Evidence

See debug section above

After switching the $TERM environmental var to xterm-256color nano opens just fine

Is there a reason that $TERM=xterm and not $TERM=xterm-256color? Will this have other repercussions that are undesired?

[dewi-ny-je]

Who knows. I'll apply a fix and something more to my repo, give me few days to finish other stuff first

[dewi-ny-je]

The repo has no XTERM environment variable in the profile, so it must be added by busybox on its own I guess?

[numericOverflow]

@dewi-ny-je - I fixed it by adding a line to the bottom of the generic user profile.

Would that work?

[dewi-ny-je]

@numericOverflow Tested, it works. I fixed it in my fork https://github.com/dewi-ny-je/Xiaomi-Dafang-Hacks

However, it could be a mistake by whoever compiled it. https://github.com/EliasKotlyar/Xiaomi-Dafang-Hacks/pull/1693