Script started on Mon Nov 10 17:25:21 2025
macbook:logs> cd ../programs/unix_ch4
macbook:unix_ch4> #echo strcmp(str1, "Hello") 
zsh: unknown file attribute: 1
macbook:unix_ch4> echo $SHELL
/bin/zsh
macbook:unix_ch4> a="3"
macbook:unix_ch4> echo $a
3
macbook:unix_ch4> echo $HOME 
/Users/mweeks
macbook:unix_ch4> echo $USER
mweeks
macbook:unix_ch4> whoami
mweeks
macbook:unix_ch4> echo $$
89078
macbook:unix_ch4> ps 
  PID TTY           TIME CMD
89051 ttys000    0:00.03 -zsh
89077 ttys000    0:00.02 script Nov10_2025.log
61781 ttys001    0:00.44 -zsh
89026 ttys002    0:00.01 -zsh
89078 ttys003    0:00.06 /bin/zsh -i
macbook:unix_ch4> sleep 1000 &
[1] 91442
macbook:unix_ch4> ps
  PID TTY           TIME CMD
89051 ttys000    0:00.03 -zsh
89077 ttys000    0:00.03 script Nov10_2025.log
61781 ttys001    0:00.44 -zsh
89026 ttys002    0:00.01 -zsh
89078 ttys003    0:00.06 /bin/zsh -i
91442 ttys003    0:00.00 sleep 1000
macbook:unix_ch4> kill -TERM 91442
[1]  + terminated  sleep 1000                                                   
macbook:unix_ch4> ps -efl
  UID   PID  PPID   C STIME   TTY           TIME CMD                     F PRI NI       SZ    RSS WCHAN     S             ADDR
    0     1     0   0  9Oct25 ??        96:54.89 /sbin/launchd        4004  37  0 426857840  24656 -      Ss                  0
    0   100     1   0  9Oct25 ??        40:04.12 /usr/libexec/log     4004  37  0 427155952  66320 -      Ss                  0
    0   101     1   0  9Oct25 ??         0:03.42 /usr/libexec/smd     4004   4  0 426967088   6688 -      Ss                  0
[Many lines deleted]
  502 89078 89077   0  5:25PM ttys003    0:00.07 /bin/zsh -i          4006  31  0 410799600   5456 -      Ss                  0
    0 91552 89078   0  6:30PM ttys003    0:00.01 ps -efl              4106  31  0 410724368   2400 -      R+                  0
macbook:unix_ch4> 
macbook:unix_ch4> (sleep 30; echo done 1) &
[1] 91875
macbook:unix_ch4> (sleep 30; echo done 2) &
[2] 91881
macbook:unix_ch4> echo done 3; wait; echo done 4
done 3
done 1
[1]  - done       ( sleep 30; echo done 1; )
done 2
[2]  + done       ( sleep 30; echo done 2; )
done 4
macbook:unix_ch4> echo $PATH
/Users/mweeks/.diversion/bin:/Users/mweeks/.diversion/bin:/Library/Frameworks/Python.framework/Versions/3.11/bin:/Users/mweeks/.diversion/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/opt/local/bin:/opt/local/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/opt/X11/bin:/Library/Apple/usr/bin:/Library/TeX/texbin
macbook:unix_ch4> x="one two"
macbook:unix_ch4> echo $x
one two
macbook:unix_ch4> echo ${x}3
one two3
macbook:unix_ch4> x3="three"
macbook:unix_ch4> echo $x3
three
macbook:unix_ch4> echo $x   
one two
macbook:unix_ch4> echo ${x}3
one two3
macbook:unix_ch4> read v1 v2
one
macbook:unix_ch4> echo $v2

macbook:unix_ch4> echo $v1
one
macbook:unix_ch4> read v1 v2
four five
macbook:unix_ch4> echo $v2
five
macbook:unix_ch4> echo $v1
four
macbook:unix_ch4> exit

Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

Script done on Mon Nov 10 18:44:41 2025