diff mbox series

P*rtability of dash to legacy systems, such as AT&T Unix PC : 04-mksignames

Message ID ac8f500e-63fb-4f5e-a7a3-550c8e7fb63c@knaff.lu (mailing list archive)
State Under Review
Delegated to: Herbert Xu
Headers show
Series P*rtability of dash to legacy systems, such as AT&T Unix PC : 04-mksignames | expand

Commit Message

Alain Knaff Nov. 17, 2024, 9:38 a.m. UTC 
Hi,

The fourth part of the patch set rewrites mksignames in such a way
that it works in a cross-compilation environment. It uses gcc -E to
generate the bulk of the signames file, and only does minimal
processing on the build system, in order to avoid accidentally getting
the build system's signal definitions instead of the target system's.

Regards,

Alain
diff mbox series

Patch

diff -X ../exclude.txt -urN dash-0.5.12+03-name-max/src/Makefile.am dash-0.5.12+04-mksignames/src/Makefile.am
--- dash-0.5.12+03-name-max/src/Makefile.am	2020-06-03 02:23:24.000000000 +0000
+++ dash-0.5.12+04-mksignames/src/Makefile.am	2024-10-20 06:53:24.431287243 +0000
@@ -64,6 +64,11 @@ 
 signames.c: mksignames
 	$(AM_V_GEN)./$^
 
+mksignames: mksignames.c mksignames.h
+
+mksignames.h: mksignames.tmpl.h
+	$(AM_V_CC)$(COMPILE) -E $< | sed '1,/START_MKSIGNAMES_H/d' >$@
+
 mksyntax: token.h
 
 $(HELPERS): %: %.c
diff -X ../exclude.txt -urN dash-0.5.12+03-name-max/src/mksignames.c dash-0.5.12+04-mksignames/src/mksignames.c
--- dash-0.5.12+03-name-max/src/mksignames.c	2020-06-03 01:19:23.000000000 +0000
+++ dash-0.5.12+04-mksignames/src/mksignames.c	2024-10-20 06:53:24.431287243 +0000
@@ -21,344 +21,8 @@ 
 
 #include <stdio.h>
 #include <sys/types.h>
-#include <signal.h>
 #include <stdlib.h>
-
-#if !defined (NSIG)
-#  define NSIG 64
-#endif
-
-/*
- * Special traps:
- *	EXIT == 0
- */
-#define LASTSIG NSIG-1
-
-char *signal_names[2 * NSIG + 3];
-
-#define signal_names_size (sizeof(signal_names)/sizeof(signal_names[0]))
-
-char *progname;
-
-/* AIX 4.3 defines SIGRTMIN and SIGRTMAX as 888 and 999 respectively.
-   I don't want to allocate so much unused space for the intervening signal
-   numbers, so we just punt if SIGRTMAX is past the bounds of the
-   signal_names array (handled in configure). */
-#if defined (SIGRTMAX) && defined (UNUSABLE_RT_SIGNALS)
-#  undef SIGRTMAX
-#  undef SIGRTMIN
-#endif
-
-#if defined (SIGRTMAX) || defined (SIGRTMIN)
-#  define RTLEN 14
-#  define RTLIM 256
-#endif
-
-void
-initialize_signames ()
-{
-  register int i;
-#if defined (SIGRTMAX) || defined (SIGRTMIN)
-  int rtmin, rtmax, rtcnt;
-#endif
-
-  for (i = 1; i < signal_names_size; i++)
-    signal_names[i] = (char *)NULL;
-
-  /* `signal' 0 is what we do on exit. */
-  signal_names[0] = "EXIT";
-
-  /* Place signal names which can be aliases for more common signal
-     names first.  This allows (for example) SIGABRT to overwrite SIGLOST. */
-
-  /* POSIX 1003.1b-1993 real time signals, but take care of incomplete
-     implementations. Acoording to the standard, both, SIGRTMIN and
-     SIGRTMAX must be defined, SIGRTMIN must be stricly less than
-     SIGRTMAX, and the difference must be at least 7, that is, there
-     must be at least eight distinct real time signals. */
-
-  /* The generated signal names are SIGRTMIN, SIGRTMIN+1, ...,
-     SIGRTMIN+x, SIGRTMAX-x, ..., SIGRTMAX-1, SIGRTMAX. If the number
-     of RT signals is odd, there is an extra SIGRTMIN+(x+1).
-     These names are the ones used by ksh and /usr/xpg4/bin/sh on SunOS5. */
-
-#if defined (SIGRTMIN)
-  rtmin = SIGRTMIN;
-  signal_names[rtmin] = "RTMIN";
-#endif
-
-#if defined (SIGRTMAX)
-  rtmax = SIGRTMAX;
-  signal_names[rtmax] = "RTMAX";
-#endif
-
-#if defined (SIGRTMAX) && defined (SIGRTMIN)
-  if (rtmax > rtmin)
-    {
-      rtcnt = (rtmax - rtmin - 1) / 2;
-      /* croak if there are too many RT signals */
-      if (rtcnt >= RTLIM/2)
-	{
-	  rtcnt = RTLIM/2-1;
-	  fprintf(stderr, "%s: error: more than %i real time signals, fix `%s'\n",
-		  progname, RTLIM, progname);
-	}
-
-      for (i = 1; i <= rtcnt; i++)
-	{
-	  signal_names[rtmin+i] = (char *)malloc(RTLEN);
-	  if (signal_names[rtmin+i])
-	    sprintf (signal_names[rtmin+i], "RTMIN+%d", i);
-	  signal_names[rtmax-i] = (char *)malloc(RTLEN);
-	  if (signal_names[rtmax-i])
-	    sprintf (signal_names[rtmax-i], "RTMAX-%d", i);
-	}
-
-      if (rtcnt < RTLIM/2-1 && rtcnt != (rtmax-rtmin)/2)
-	{
-	  /* Need an extra RTMIN signal */
-	  signal_names[rtmin+rtcnt+1] = (char *)malloc(RTLEN);
-	  if (signal_names[rtmin+rtcnt+1])
-	    sprintf (signal_names[rtmin+rtcnt+1], "RTMIN+%d", rtcnt+1);
-	}
-    }
-#endif /* SIGRTMIN && SIGRTMAX */
-
-/* AIX */
-#if defined (SIGLOST)	/* resource lost (eg, record-lock lost) */
-  signal_names[SIGLOST] = "LOST";
-#endif
-
-#if defined (SIGMSG)	/* HFT input data pending */
-  signal_names[SIGMSG] = "MSG";
-#endif
-
-#if defined (SIGDANGER)	/* system crash imminent */
-  signal_names[SIGDANGER] = "DANGER";
-#endif
-
-#if defined (SIGMIGRATE) /* migrate process to another CPU */
-  signal_names[SIGMIGRATE] = "MIGRATE";
-#endif
-
-#if defined (SIGPRE)	/* programming error */
-  signal_names[SIGPRE] = "PRE";
-#endif
-
-#if defined (SIGVIRT)	/* AIX virtual time alarm */
-  signal_names[SIGVIRT] = "VIRT";
-#endif
-
-#if defined (SIGALRM1)	/* m:n condition variables */
-  signal_names[SIGALRM1] = "ALRM1";
-#endif
-
-#if defined (SIGWAITING)	/* m:n scheduling */
-  signal_names[SIGWAITING] = "WAITING";
-#endif
-
-#if defined (SIGGRANT)	/* HFT monitor mode granted */
-  signal_names[SIGGRANT] = "GRANT";
-#endif
-
-#if defined (SIGKAP)	/* keep alive poll from native keyboard */
-  signal_names[SIGKAP] = "KAP";
-#endif
-
-#if defined (SIGRETRACT) /* HFT monitor mode retracted */
-  signal_names[SIGRETRACT] = "RETRACT";
-#endif
-
-#if defined (SIGSOUND)	/* HFT sound sequence has completed */
-  signal_names[SIGSOUND] = "SOUND";
-#endif
-
-#if defined (SIGSAK)	/* Secure Attention Key */
-  signal_names[SIGSAK] = "SAK";
-#endif
-
-/* SunOS5 */
-#if defined (SIGLWP)	/* special signal used by thread library */
-  signal_names[SIGLWP] = "LWP";
-#endif
-
-#if defined (SIGFREEZE)	/* special signal used by CPR */
-  signal_names[SIGFREEZE] = "FREEZE";
-#endif
-
-#if defined (SIGTHAW)	/* special signal used by CPR */
-  signal_names[SIGTHAW] = "THAW";
-#endif
-
-#if defined (SIGCANCEL)	/* thread cancellation signal used by libthread */
-  signal_names[SIGCANCEL] = "CANCEL";
-#endif
-
-/* HP-UX */
-#if defined (SIGDIL)	/* DIL signal (?) */
-  signal_names[SIGDIL] = "DIL";
-#endif
-
-/* System V */
-#if defined (SIGCLD)	/* Like SIGCHLD.  */
-  signal_names[SIGCLD] = "CLD";
-#endif
-
-#if defined (SIGPWR)	/* power state indication */
-  signal_names[SIGPWR] = "PWR";
-#endif
-
-#if defined (SIGPOLL)	/* Pollable event (for streams)  */
-  signal_names[SIGPOLL] = "POLL";
-#endif
-
-/* Unknown */
-#if defined (SIGWINDOW)
-  signal_names[SIGWINDOW] = "WINDOW";
-#endif
-
-/* Common */
-#if defined (SIGHUP)	/* hangup */
-  signal_names[SIGHUP] = "HUP";
-#endif
-
-#if defined (SIGINT)	/* interrupt */
-  signal_names[SIGINT] = "INT";
-#endif
-
-#if defined (SIGQUIT)	/* quit */
-  signal_names[SIGQUIT] = "QUIT";
-#endif
-
-#if defined (SIGILL)	/* illegal instruction (not reset when caught) */
-  signal_names[SIGILL] = "ILL";
-#endif
-
-#if defined (SIGTRAP)	/* trace trap (not reset when caught) */
-  signal_names[SIGTRAP] = "TRAP";
-#endif
-
-#if defined (SIGIOT)	/* IOT instruction */
-  signal_names[SIGIOT] = "IOT";
-#endif
-
-#if defined (SIGABRT)	/* Cause current process to dump core. */
-  signal_names[SIGABRT] = "ABRT";
-#endif
-
-#if defined (SIGEMT)	/* EMT instruction */
-  signal_names[SIGEMT] = "EMT";
-#endif
-
-#if defined (SIGFPE)	/* floating point exception */
-  signal_names[SIGFPE] = "FPE";
-#endif
-
-#if defined (SIGKILL)	/* kill (cannot be caught or ignored) */
-  signal_names[SIGKILL] = "KILL";
-#endif
-
-#if defined (SIGBUS)	/* bus error */
-  signal_names[SIGBUS] = "BUS";
-#endif
-
-#if defined (SIGSEGV)	/* segmentation violation */
-  signal_names[SIGSEGV] = "SEGV";
-#endif
-
-#if defined (SIGSYS)	/* bad argument to system call */
-  signal_names[SIGSYS] = "SYS";
-#endif
-
-#if defined (SIGPIPE)	/* write on a pipe with no one to read it */
-  signal_names[SIGPIPE] = "PIPE";
-#endif
-
-#if defined (SIGALRM)	/* alarm clock */
-  signal_names[SIGALRM] = "ALRM";
-#endif
-
-#if defined (SIGTERM)	/* software termination signal from kill */
-  signal_names[SIGTERM] = "TERM";
-#endif
-
-#if defined (SIGURG)	/* urgent condition on IO channel */
-  signal_names[SIGURG] = "URG";
-#endif
-
-#if defined (SIGSTOP)	/* sendable stop signal not from tty */
-  signal_names[SIGSTOP] = "STOP";
-#endif
-
-#if defined (SIGTSTP)	/* stop signal from tty */
-  signal_names[SIGTSTP] = "TSTP";
-#endif
-
-#if defined (SIGCONT)	/* continue a stopped process */
-  signal_names[SIGCONT] = "CONT";
-#endif
-
-#if defined (SIGCHLD)	/* to parent on child stop or exit */
-  signal_names[SIGCHLD] = "CHLD";
-#endif
-
-#if defined (SIGTTIN)	/* to readers pgrp upon background tty read */
-  signal_names[SIGTTIN] = "TTIN";
-#endif
-
-#if defined (SIGTTOU)	/* like TTIN for output if (tp->t_local&LTOSTOP) */
-  signal_names[SIGTTOU] = "TTOU";
-#endif
-
-#if defined (SIGIO)	/* input/output possible signal */
-  signal_names[SIGIO] = "IO";
-#endif
-
-#if defined (SIGXCPU)	/* exceeded CPU time limit */
-  signal_names[SIGXCPU] = "XCPU";
-#endif
-
-#if defined (SIGXFSZ)	/* exceeded file size limit */
-  signal_names[SIGXFSZ] = "XFSZ";
-#endif
-
-#if defined (SIGVTALRM)	/* virtual time alarm */
-  signal_names[SIGVTALRM] = "VTALRM";
-#endif
-
-#if defined (SIGPROF)	/* profiling time alarm */
-  signal_names[SIGPROF] = "PROF";
-#endif
-
-#if defined (SIGWINCH)	/* window changed */
-  signal_names[SIGWINCH] = "WINCH";
-#endif
-
-/* 4.4 BSD */
-#if defined (SIGINFO) && !defined (_SEQUENT_)	/* information request */
-  signal_names[SIGINFO] = "INFO";
-#endif
-
-#if defined (SIGUSR1)	/* user defined signal 1 */
-  signal_names[SIGUSR1] = "USR1";
-#endif
-
-#if defined (SIGUSR2)	/* user defined signal 2 */
-  signal_names[SIGUSR2] = "USR2";
-#endif
-
-#if defined (SIGKILLTHR)	/* BeOS: Kill Thread */
-  signal_names[SIGKILLTHR] = "KILLTHR";
-#endif
-
-  for (i = 0; i < NSIG; i++)
-    if (signal_names[i] == (char *)NULL)
-      {
-	signal_names[i] = (char *)malloc (18);
-	if (signal_names[i])
-	  sprintf (signal_names[i], "%d", i);
-      }
-}
+#include "mksignames.h"
 
 void
 write_signames (stream)
@@ -372,7 +36,7 @@ 
   fprintf (stream, "#include <signal.h>\n\n");
   fprintf (stream,
 	   "/* A translation list so we can be polite to our users. */\n");
-  fprintf (stream, "const char *const signal_names[NSIG + 1] = {\n");
+  fprintf (stream, "const char *const signal_names[%d] = {\n", LASTSIG + 2);
 
   for (i = 0; i <= LASTSIG; i++)
     fprintf (stream, "    \"%s\",\n", signal_names[i]);
diff -X ../exclude.txt -urN dash-0.5.12+03-name-max/src/mksignames.tmpl.h dash-0.5.12+04-mksignames/src/mksignames.tmpl.h
--- dash-0.5.12+03-name-max/src/mksignames.tmpl.h	1970-01-01 00:00:00.000000000 +0000
+++ dash-0.5.12+04-mksignames/src/mksignames.tmpl.h	2024-10-20 06:53:24.431287243 +0000
@@ -0,0 +1,349 @@ 
+#include <sys/types.h>
+#include <signal.h>
+
+START_MKSIGNAMES_H
+
+#if !defined (NSIG)
+#  define NSIG 64
+#endif
+
+/*
+ * Special traps:
+ *	EXIT == 0
+ */
+static int LASTSIG = NSIG-1;
+
+char *signal_names[2 * NSIG + 3];
+#define ARRAY_SIZE (2 * NSIG + 3)
+
+#define signal_names_size (sizeof(signal_names)/sizeof(signal_names[0]))
+
+char *progname;
+
+/* AIX 4.3 defines SIGRTMIN and SIGRTMAX as 888 and 999 respectively.
+   I don't want to allocate so much unused space for the intervening signal
+   numbers, so we just punt if SIGRTMAX is past the bounds of the
+   signal_names array (handled in configure). */
+#if defined (SIGRTMAX) && defined (UNUSABLE_RT_SIGNALS)
+#  undef SIGRTMAX
+#  undef SIGRTMIN
+#endif
+
+#if defined (SIGRTMAX) || defined (SIGRTMIN)
+#  define RTLEN 17
+#  define RTLIM 256
+#endif
+
+void
+initialize_signames ()
+{
+  register int i;
+#if defined (SIGRTMAX) || defined (SIGRTMIN)
+  int rtmin, rtmax, rtcnt;
+#endif
+
+  for (i = 1; i < signal_names_size; i++)
+    signal_names[i] = (char *)NULL;
+
+  /* `signal' 0 is what we do on exit. */
+  signal_names[0] = "EXIT";
+
+  /* Place signal names which can be aliases for more common signal
+     names first.  This allows (for example) SIGABRT to overwrite SIGLOST. */
+
+  /* POSIX 1003.1b-1993 real time signals, but take care of incomplete
+     implementations. Acoording to the standard, both, SIGRTMIN and
+     SIGRTMAX must be defined, SIGRTMIN must be stricly less than
+     SIGRTMAX, and the difference must be at least 7, that is, there
+     must be at least eight distinct real time signals. */
+
+  /* The generated signal names are SIGRTMIN, SIGRTMIN+1, ...,
+     SIGRTMIN+x, SIGRTMAX-x, ..., SIGRTMAX-1, SIGRTMAX. If the number
+     of RT signals is odd, there is an extra SIGRTMIN+(x+1).
+     These names are the ones used by ksh and /usr/xpg4/bin/sh on SunOS5. */
+
+#if defined (SIGRTMIN)
+  rtmin = SIGRTMIN;
+  if(rtmin < ARRAY_SIZE)
+    signal_names[rtmin] = "RTMIN";
+#endif
+
+#if defined (SIGRTMAX)
+  rtmax = SIGRTMAX;
+  if(rtmax < ARRAY_SIZE)
+    signal_names[rtmax] = "RTMAX";
+#endif
+
+#if defined (SIGRTMAX) && defined (SIGRTMIN)
+  if (rtmax > rtmin)
+    {
+      rtcnt = (rtmax - rtmin - 1) / 2;
+      /* croak if there are too many RT signals */
+      if (rtcnt >= RTLIM/2)
+	{
+	  rtcnt = RTLIM/2-1;
+	  fprintf(stderr, "%s: error: more than %i real time signals, fix `%s'\n",
+		  progname, RTLIM, progname);
+	}
+
+      for (i = 1; i <= rtcnt; i++)
+	{
+	  if (rtmin+i < ARRAY_SIZE) {
+	    signal_names[rtmin+i] = (char *)malloc(RTLEN);
+	    if(signal_names[rtmin+i])
+	      sprintf (signal_names[rtmin+i], "RTMIN+%d", i);
+	  }
+	  if (rtmax-i < ARRAY_SIZE) {
+	    signal_names[rtmax-i] = (char *)malloc(RTLEN);
+	    if(signal_names[rtmax-i])
+	      sprintf (signal_names[rtmax-i], "RTMAX-%d", i);
+	  }
+	}
+
+      if (rtcnt < RTLIM/2-1 && rtcnt != (rtmax-rtmin)/2)
+	{
+	  if (rtmin+rtcnt+1 < ARRAY_SIZE) {
+	    /* Need an extra RTMIN signal */
+	    signal_names[rtmin+rtcnt+1] = (char *)malloc(RTLEN);
+	    if (signal_names[rtmin+rtcnt+1])
+	      sprintf (signal_names[rtmin+rtcnt+1], "RTMIN+%d", rtcnt+1);
+	  }
+	}
+    }
+#endif /* SIGRTMIN && SIGRTMAX */
+
+/* AIX */
+#if defined (SIGLOST)	/* resource lost (eg, record-lock lost) */
+  signal_names[SIGLOST] = "LOST";
+#endif
+
+#if defined (SIGMSG)	/* HFT input data pending */
+  signal_names[SIGMSG] = "MSG";
+#endif
+
+#if defined (SIGDANGER)	/* system crash imminent */
+  signal_names[SIGDANGER] = "DANGER";
+#endif
+
+#if defined (SIGMIGRATE) /* migrate process to another CPU */
+  signal_names[SIGMIGRATE] = "MIGRATE";
+#endif
+
+#if defined (SIGPRE)	/* programming error */
+  signal_names[SIGPRE] = "PRE";
+#endif
+
+#if defined (SIGVIRT)	/* AIX virtual time alarm */
+  signal_names[SIGVIRT] = "VIRT";
+#endif
+
+#if defined (SIGALRM1)	/* m:n condition variables */
+  signal_names[SIGALRM1] = "ALRM1";
+#endif
+
+#if defined (SIGWAITING)	/* m:n scheduling */
+  signal_names[SIGWAITING] = "WAITING";
+#endif
+
+#if defined (SIGGRANT)	/* HFT monitor mode granted */
+  signal_names[SIGGRANT] = "GRANT";
+#endif
+
+#if defined (SIGKAP)	/* keep alive poll from native keyboard */
+  signal_names[SIGKAP] = "KAP";
+#endif
+
+#if defined (SIGRETRACT) /* HFT monitor mode retracted */
+  signal_names[SIGRETRACT] = "RETRACT";
+#endif
+
+#if defined (SIGSOUND)	/* HFT sound sequence has completed */
+  signal_names[SIGSOUND] = "SOUND";
+#endif
+
+#if defined (SIGSAK)	/* Secure Attention Key */
+  signal_names[SIGSAK] = "SAK";
+#endif
+
+/* SunOS5 */
+#if defined (SIGLWP)	/* special signal used by thread library */
+  signal_names[SIGLWP] = "LWP";
+#endif
+
+#if defined (SIGFREEZE)	/* special signal used by CPR */
+  signal_names[SIGFREEZE] = "FREEZE";
+#endif
+
+#if defined (SIGTHAW)	/* special signal used by CPR */
+  signal_names[SIGTHAW] = "THAW";
+#endif
+
+#if defined (SIGCANCEL)	/* thread cancellation signal used by libthread */
+  signal_names[SIGCANCEL] = "CANCEL";
+#endif
+
+/* HP-UX */
+#if defined (SIGDIL)	/* DIL signal (?) */
+  signal_names[SIGDIL] = "DIL";
+#endif
+
+/* System V */
+#if defined (SIGCLD)	/* Like SIGCHLD.  */
+  signal_names[SIGCLD] = "CLD";
+#endif
+
+#if defined (SIGPWR)	/* power state indication */
+  signal_names[SIGPWR] = "PWR";
+#endif
+
+#if defined (SIGPOLL)	/* Pollable event (for streams)  */
+  signal_names[SIGPOLL] = "POLL";
+#endif
+
+/* Unknown */
+#if defined (SIGWINDOW)
+  signal_names[SIGWINDOW] = "WINDOW";
+#endif
+
+/* Common */
+#if defined (SIGHUP)	/* hangup */
+  signal_names[SIGHUP] = "HUP";
+#endif
+
+#if defined (SIGINT)	/* interrupt */
+  signal_names[SIGINT] = "INT";
+#endif
+
+#if defined (SIGQUIT)	/* quit */
+  signal_names[SIGQUIT] = "QUIT";
+#endif
+
+#if defined (SIGILL)	/* illegal instruction (not reset when caught) */
+  signal_names[SIGILL] = "ILL";
+#endif
+
+#if defined (SIGTRAP)	/* trace trap (not reset when caught) */
+  signal_names[SIGTRAP] = "TRAP";
+#endif
+
+#if defined (SIGIOT)	/* IOT instruction */
+  signal_names[SIGIOT] = "IOT";
+#endif
+
+#if defined (SIGABRT)	/* Cause current process to dump core. */
+  signal_names[SIGABRT] = "ABRT";
+#endif
+
+#if defined (SIGEMT)	/* EMT instruction */
+  signal_names[SIGEMT] = "EMT";
+#endif
+
+#if defined (SIGFPE)	/* floating point exception */
+  signal_names[SIGFPE] = "FPE";
+#endif
+
+#if defined (SIGKILL)	/* kill (cannot be caught or ignored) */
+  signal_names[SIGKILL] = "KILL";
+#endif
+
+#if defined (SIGBUS)	/* bus error */
+  signal_names[SIGBUS] = "BUS";
+#endif
+
+#if defined (SIGSEGV)	/* segmentation violation */
+  signal_names[SIGSEGV] = "SEGV";
+#endif
+
+#if defined (SIGSYS)	/* bad argument to system call */
+  signal_names[SIGSYS] = "SYS";
+#endif
+
+#if defined (SIGPIPE)	/* write on a pipe with no one to read it */
+  signal_names[SIGPIPE] = "PIPE";
+#endif
+
+#if defined (SIGALRM)	/* alarm clock */
+  signal_names[SIGALRM] = "ALRM";
+#endif
+
+#if defined (SIGTERM)	/* software termination signal from kill */
+  signal_names[SIGTERM] = "TERM";
+#endif
+
+#if defined (SIGURG)	/* urgent condition on IO channel */
+  signal_names[SIGURG] = "URG";
+#endif
+
+#if defined (SIGSTOP)	/* sendable stop signal not from tty */
+  signal_names[SIGSTOP] = "STOP";
+#endif
+
+#if defined (SIGTSTP)	/* stop signal from tty */
+  signal_names[SIGTSTP] = "TSTP";
+#endif
+
+#if defined (SIGCONT)	/* continue a stopped process */
+  signal_names[SIGCONT] = "CONT";
+#endif
+
+#if defined (SIGCHLD)	/* to parent on child stop or exit */
+  signal_names[SIGCHLD] = "CHLD";
+#endif
+
+#if defined (SIGTTIN)	/* to readers pgrp upon background tty read */
+  signal_names[SIGTTIN] = "TTIN";
+#endif
+
+#if defined (SIGTTOU)	/* like TTIN for output if (tp->t_local&LTOSTOP) */
+  signal_names[SIGTTOU] = "TTOU";
+#endif
+
+#if defined (SIGIO)	/* input/output possible signal */
+  signal_names[SIGIO] = "IO";
+#endif
+
+#if defined (SIGXCPU)	/* exceeded CPU time limit */
+  signal_names[SIGXCPU] = "XCPU";
+#endif
+
+#if defined (SIGXFSZ)	/* exceeded file size limit */
+  signal_names[SIGXFSZ] = "XFSZ";
+#endif
+
+#if defined (SIGVTALRM)	/* virtual time alarm */
+  signal_names[SIGVTALRM] = "VTALRM";
+#endif
+
+#if defined (SIGPROF)	/* profiling time alarm */
+  signal_names[SIGPROF] = "PROF";
+#endif
+
+#if defined (SIGWINCH)	/* window changed */
+  signal_names[SIGWINCH] = "WINCH";
+#endif
+
+/* 4.4 BSD */
+#if defined (SIGINFO) && !defined (_SEQUENT_)	/* information request */
+  signal_names[SIGINFO] = "INFO";
+#endif
+
+#if defined (SIGUSR1)	/* user defined signal 1 */
+  signal_names[SIGUSR1] = "USR1";
+#endif
+
+#if defined (SIGUSR2)	/* user defined signal 2 */
+  signal_names[SIGUSR2] = "USR2";
+#endif
+
+#if defined (SIGKILLTHR)	/* BeOS: Kill Thread */
+  signal_names[SIGKILLTHR] = "KILLTHR";
+#endif
+
+  for (i = 0; i < NSIG; i++)
+    if (signal_names[i] == (char *)NULL)
+      {
+	signal_names[i] = (char *)malloc (18);
+	if (signal_names[i])
+	  sprintf (signal_names[i], "%d", i);
+      }
+}