bin@primate.wisc.edu (Brain in Neutral) (02/09/90)
For the signal() system call in RISC/os 4, there are multiple versions. The BSD man page indicates that the handler function returns int: SIGNAL(3C-BSD) RISC/os Reference Manual SIGNAL(3C-BSD) SYNOPSIS #include <signal.h> (*signal(sig, func))() int (*func)(); NOTES (MIPS) The handler routine can be declared: handler(sig, code, scp) int sig, code; struct sigcontext *scp; That's fine, and consistent. ---------------------------------------------------------------------------- On the other hand, one SYSV man page indicates that the function returns void, but then the example declaration is that of a function that returns int. Which is it? SIGNAL(2-SysV) RISC/os Reference Manual SIGNAL(2-SysV) SYNOPSIS #include <signal.h> void (*signal (sig, func))() int sig; void (*func)(); NOTES (MIPS) The handler routine can be declared: handler(sig, code, scp) int sig, code; struct sigcontext *scp; Even more confusing, there is a SIGNAL(3-SysV) man page, which says: (*signal(sig, func))() int (*func)(); which is the same as SIGNAL(3C-BSD), but different than SIGNAL(3-SysV)! I seek enlightenment... Paul DuBois Internet: dubois@primate.wisc.edu UUCP: rhesus!dubois FAX: 608/263-4031
kris@mips.COM (Kris Solem) (02/10/90)
In article <1568@uakari.primate.wisc.edu> bin@primate.wisc.edu (Brain in Neutral) writes: > >For the signal() system call in RISC/os 4, there are multiple versions. >The BSD man page indicates that the handler function returns int: > [example deleted] >On the other hand, one SYSV man page indicates that the function returns >void, but then the example declaration is that of a function that returns >int. Which is it? [example deleted] >Paul DuBois >Internet: dubois@primate.wisc.edu >UUCP: rhesus!dubois >FAX: 608/263-4031 The signal(2-SYSV) man pages has been fixed to indicate that the return type for handler is void. The signal(3C-SYSV) man page was removed in RISC/os 4.0, at least on-line. It shouldn't show up in the manual in the next release. Kris Solem {ames,decwrl,pyramid,prls}!mips!kris or kris@mips.com MIPS Computer Systems 408-991-7726 930 Arques Avenue Sunnyvale, CA 94086 -- Kris Solem {ames,decwrl,pyramid,prls}!mips!kris or kris@mips.com MIPS Computer Systems 408-991-7726 930 Arques Avenue Sunnyvale, CA 94086