4 ms·

I’m guessing v4 C didn’t have structs yet (v6 C does, but struct members are actually in the global namespace and are basically just sugar for offset and a type

• Boltgolt 10mo ago
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  • jacquesm 10mo ago
    Heh. I had the same impulse but then didn't do it, upon refreshing the page your comment was there :)
• topspin 10mo ago
  > I’m guessing v4 C didn’t have structs yet There may have been a early C without structs (B had none,) but according to Ken Thompson, the addition of structs to C was an important change, and a reason why his third attempt rewrite UNIX from assembly to a portable language finally succeeded. Certainly by the time the recently recovered v4 tape was made, C had structs: ~/unix_v4$ cat usr/sys/proc.h struct proc { char p_stat; char p_flag; char p_pri; char p_sig; char p_null; char p_time; int p_ttyp; int p_pid; int p_ppid; int p_addr; int p_size; int p_wchan; int *p_textp; } proc[NPROC]; /* stat codes */ #define SSLEEP 1 #define SWAIT 2 #define SRUN 3 #define SIDL 4 #define SZOMB 5 /* flag codes */ #define SLOAD 01 #define SSYS 02 #define SLOCK 04 #define SSWAP 010