1  /* signame.c -- get the name of a signal
       2  
       3     Copyright 2012 The Go Authors. All rights reserved.
       4     Use of this source code is governed by a BSD-style
       5     license that can be found in the LICENSE file.  */
       6  
       7  #include <string.h>
       8  
       9  #include "runtime.h"
      10  #include "arch.h"
      11  #include "malloc.h"
      12  
      13  String Signame (intgo sig) __asm__ (GOSYM_PREFIX "syscall.Signame");
      14  
      15  String
      16  Signame (intgo sig)
      17  {
      18    const char* s = NULL;
      19    char buf[100];
      20    size_t len;
      21    byte *data;
      22    String ret;
      23  
      24  #if defined(HAVE_STRSIGNAL)
      25    s = strsignal (sig);
      26  #endif
      27  
      28    if (s == NULL)
      29      {
      30        snprintf(buf, sizeof buf, "signal %ld", (long) sig);
      31        s = buf;
      32      }
      33    len = __builtin_strlen (s);
      34    data = runtime_mallocgc (len, nil, false);
      35    __builtin_memcpy (data, s, len);
      36    // lowercase first letter: Bad -> bad, but STREAM -> STREAM.
      37    if ('A' <= data[0] && data[0] <= 'Z' && 'a' <= data[1] && data[1] <= 'z')
      38      data[0] += 'a' - 'A';
      39    ret.str = data;
      40    ret.len = len;
      41    return ret;
      42  }