kiely@lownlab.UUCP (James P. Kiely) (04/09/85)
In the manual page for getpid() it states that a long is returned. In the readable lint file it says that an int is returned. What does getpid() return under 4.2BSD? NAME: James P. Kiely USENET: ...!harvard!hscfvax!lownlab!kiely USPS: Lown Cardiovascular Laboratory Harvard School of Public Health 665 Huntington Avenue Boston, Mass. 02115-9915 PHONE: 617/732-1307
guy@sun.uucp (Guy Harris) (04/11/85)
> In the manual page for getpid() it states that a long is returned. > In the readable lint file it says that an int is returned. > > What does getpid() return under 4.2BSD? The smartass answer is that "int"s and "long"s are one and the same under 4.2BSD (for instance, Internet addresses, which are 32-bit quantities, are declared as "int" all throughout 4.2) so it doesn't make a difference. Process IDs are declared as "long" some places in the kernel and as "int" in others. Since 4.2, like most other V7-family systems, limits process IDs to the range 0 <= PID < 30000, PIDs will fit in a 16-bit "int". I'm not sure why they declared them as longs where they did. In all other UNIX systems, "getpid" returns an "int". I'd say the manual page is wedged. Guy Harris sun!guy