Your kernel should export this information in procfs:
cat /proc/sys/kernel/pid_max
This is the maximum number of unique process identifiers your system can support.
Since it is a file, /proc/sys/kernel/pid_max can be inspected from any capable programming language.
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
