69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
/* Copyright 2002, 2011 Red Hat Inc. */
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/*
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FUNCTION
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<<psignal>>---print a signal message on standard error
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INDEX
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psignal
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SYNOPSIS
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#include <stdio.h>
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void psignal(int <[signal]>, const char *<[prefix]>);
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DESCRIPTION
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Use <<psignal>> to print (on standard error) a signal message
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corresponding to the value of the signal number <[signal]>.
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Unless you use <<NULL>> as the value of the argument <[prefix]>, the
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signal message will begin with the string at <[prefix]>, followed by a
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colon and a space (<<: >>). The remainder of the signal message is one
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of the strings described for <<strsignal>>.
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RETURNS
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<<psignal>> returns no result.
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PORTABILITY
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POSIX.1-2008 requires <<psignal>>, but the strings issued vary from one
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implementation to another.
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
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*/
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#include <_ansi.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/uio.h>
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#define ADD(str) \
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{ \
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v->iov_base = (void *)(str); \
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v->iov_len = strlen (v->iov_base); \
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v ++; \
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iov_cnt ++; \
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}
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void
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psignal (int sig,
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const char *s)
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{
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struct iovec iov[4];
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struct iovec *v = iov;
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int iov_cnt = 0;
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if (s != NULL && *s != '\0')
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{
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ADD (s);
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ADD (": ");
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}
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ADD (strsignal (sig));
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#ifdef __SCLE
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ADD ((stderr->_flags & __SCLE) ? "\r\n" : "\n");
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#else
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ADD ("\n");
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#endif
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fflush (stderr);
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writev (fileno (stderr), iov, iov_cnt);
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}
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