ping:7: fork failed: resource temporarily unavailable

[BirkhoffLee]

Running on macOS Big Sur 11.6, Darwin BirkhoffMBPR 20.6.0 Darwin Kernel Version 20.6.0: Mon Aug 30 06:12:21 PDT 2021; root:xnu-7195.141.6~3/RELEASE_X86_64 x86_64 i386 MacBookPro13,2 Darwin, I get the following:

$ wget https://raw.githubusercontent.com/denilsonsa/prettyping/master/prettyping
--2021-11-07 14:56:02--  https://raw.githubusercontent.com/denilsonsa/prettyping/master/prettyping
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 185.199.109.133, 185.199.110.133, 185.199.111.133, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|185.199.109.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 23396 (23K) [text/plain]
Saving to: ‘prettyping’

prettyping                       100%[========================================================>]  22.85K  12.8KB/s    in 1.8s

2021-11-07 14:56:05 (12.8 KB/s) - ‘prettyping’ saved [23396/23396]

$ chmod +x prettyping

$ ./prettyping 1.1.1.1
0 ▁ 10 ▂ 20 ▃ 30 ▄ 40 ▅ 50 ▆ 60 ▇ 70 █ 80 ▁ 90 ▂ 100 ▃ 110 ▄ 120 ▅ 130 ▆ 140 ▇ 150 █ 160 ▁ 170 ▂ 180 ▃ 190 ▄ 200 ▅ 210 ▆ 220 ▇
230 █ ∞
0 ▁ 10 ▂ 20 ▃ 30 ▄ 40 ▅ 50 ▆ 60 ▇ 70 █ 80 ▁ 90 ▂ 100 ▃ 110 ▄ 120 ▅ 130 ▆ 140 ▇ 150 █ 160 ▁ 170 ▂ 180 ▃ 190 ▄ 200 ▅ 210 ▆ 220 ▇ 230 █ ∞
Last message repeated 2 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 2 times.
Last message repeated 3 times.
sh: fork: Resource temporarily unavailable
0 ▁ 10 ▂ 20 ▃ 30 ▄ 40 ▅ 50 ▆ 60 ▇ 70 █ 80 ▁ 90 ▂ 100 ▃ 110 ▄ 120 ▅ 130 ▆ 140 ▇ 150 █ 160 ▁ 170 ▂ 180 ▃ 190 ▄ 200 ▅ 210 ▆ 220 ▇ 230 █ ∞
ping:7: fork failed: resource temporarily unavailable

$ /sbin/ping 1.1.1.1
PING 1.1.1.1 (1.1.1.1): 56 data bytes
64 bytes from 1.1.1.1: icmp_seq=0 ttl=54 time=55.997 ms
64 bytes from 1.1.1.1: icmp_seq=1 ttl=54 time=45.403 ms
64 bytes from 1.1.1.1: icmp_seq=2 ttl=54 time=52.760 ms
^C
--- 1.1.1.1 ping statistics ---
4 packets transmitted, 3 packets received, 25.0% packet loss
round-trip min/avg/max/stddev = 45.403/51.387/55.997/4.433 ms

Looks like prettyping is exhausting shell resources somehow, while the stock ping utility functions normally.

[BirkhoffLee]

Running with bash ./prettyping instead of ./prettyping on ZSH fixes the issue.

[BirkhoffLee]

Apparently it does not:

bash-5.1$ ./prettyping 1.1.1.1
0 ▁ 10 ▂ 20 ▃ 30 ▄ 40 ▅ 50 ▆ 60 ▇ 70 █ 80 ▁ 90 ▂ 100 ▃ 110 ▄ 120 ▅ 130 ▆ 140 ▇ 150 █ 160 ▁ 170 ▂ 180 ▃ 190 ▄ 200 ▅ 210 ▆ 220 ▇
230 █ ∞
^C^C^C^C0 ▁ 10 ▂ 20 ▃ 30 ▄ 40 ▅ 50 ▆ 60 ▇ 70 █ 80 ▁ 90 ▂ 100 ▃ 110 ▄ 120 ▅ 130 ▆ 140 ▇ 150 █ 160 ▁ 170 ▂ 180 ▃ 190 ▄ 200 ▅ 210 ▆ 220 ▇ 230 █ ∞
Last message repeated 2 times.
Last message repeated 2 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 2 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 3 times.
Last message repeated 2 times.
Last message repeated 2 times.
Last message repeated 3 times.
ping:7: fork failed: resource temporarily unavailable
bash-5.1$