projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 3084bb00 JL |
1 | # include "signal.h" |
| 2 | #undef NSIG | |
| 3 | # ifdef PWB | |
| 4 | #define NSIG 16 | |
| 5 | # else | |
| 6 | #define NSIG 4 | |
| 7 | # endif | |
| 8 | # include "../hdr/macros.h" | |
| 9 | SCCSID(@(#)setsig 2.1); | |
| 10 | ||
| 11 | /* | |
| 12 | General-purpose signal setting routine. | |
| 13 | All non-ignored, non-caught signals are caught. | |
| 14 | If a signal other than hangup, interrupt, or quit is caught, | |
| 15 | a "user-oriented" message is printed on file descriptor 2 with | |
| 16 | a number for help(I). | |
| 17 | If hangup, interrupt or quit is caught, that signal | |
| 18 | is set to ignore. | |
| 19 | Termination is like that of "fatal", | |
| 20 | via "clean_up(sig)" (sig is the signal number) | |
| 21 | and "exit(userexit(1))". | |
| 22 | ||
| 23 | If the file "dump.core" exists in the current directory | |
| 24 | the function commits | |
| 25 | suicide to produce a core dump | |
| 26 | (after calling clean_up, but before calling userexit). | |
| 27 | */ | |
| 28 | ||
| 29 | ||
| 30 | char *Mesg[NSIG] { | |
| 31 | 0, | |
| 32 | 0, /* Hangup */ | |
| 33 | 0, /* Interrupt */ | |
| 34 | 0, /* Quit */ | |
| 35 | # ifdef PWB | |
| 36 | "Illegal instruction", | |
| 37 | "Trace/BPT trap", | |
| 38 | "IOT trap", | |
| 39 | "EMT trap", | |
| 40 | "Floating exception", | |
| 41 | "Killed", | |
| 42 | "Bus error", | |
| 43 | "Memory fault", | |
| 44 | "Bad system call", | |
| 45 | "Broken pipe", | |
| 46 | "Alarm clock", | |
| 47 | "Terminated" | |
| 48 | # endif PWB | |
| 49 | }; | |
| 50 | ||
| 51 | ||
| 52 | setsig() | |
| 53 | { | |
| 54 | extern int setsig1(); | |
| 55 | register int j, n; | |
| 56 | ||
| 57 | for (j=1; j<NSIG; j++) | |
| 58 | if (n=signal(j,setsig1)) | |
| 59 | signal(j,n); | |
| 60 | } | |
| 61 | ||
| 62 | ||
| 63 | static char preface[] "SIGNAL: "; | |
| 64 | static char endmsg[] " (ut12)\n"; | |
| 65 | ||
| 66 | setsig1(sig) | |
| 67 | int sig; | |
| 68 | { | |
| 69 | # ifndef PWB | |
| 70 | sig = 2; | |
| 71 | # endif PWB | |
| 72 | if (Mesg[sig]) { | |
| 73 | syswrite(2,preface,length(preface)); | |
| 74 | syswrite(2,Mesg[sig],length(Mesg[sig])); | |
| 75 | syswrite(2,endmsg,length(endmsg)); | |
| 76 | } | |
| 77 | else | |
| 78 | signal(sig,1); | |
| 79 | clean_up(sig); | |
| 80 | if(open("dump.core",0) > 0) { | |
| 81 | signal(SIGIOT,0); | |
| 82 | abort(); | |
| 83 | } | |
| 84 | exit(userexit(1)); | |
| 85 | } |