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/*-------------------------------------------------------------------------
*
* wait_error.c
* Convert a wait/waitpid(2) result code to a human-readable string
*
*
* Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/common/wait_error.c
*
*-------------------------------------------------------------------------
*/
#ifndef FRONTEND
#include "postgres.h"
#else
#include "postgres_fe.h"
#endif
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <sys/wait.h>
/*
* Return a human-readable string explaining the reason a child process
* terminated. The argument is a return code returned by wait(2) or
* waitpid(2). The result is a translated, palloc'd or malloc'd string.
*/
char *
wait_result_to_str(int exitstatus)
{
char str[512];
if (WIFEXITED(exitstatus))
{
/*
* Give more specific error message for some common exit codes that
* have a special meaning in shells.
*/
switch (WEXITSTATUS(exitstatus))
{
case 126:
snprintf(str, sizeof(str), _("command not executable"));
break;
case 127:
snprintf(str, sizeof(str), _("command not found"));
break;
default:
snprintf(str, sizeof(str),
_("child process exited with exit code %d"),
WEXITSTATUS(exitstatus));
}
}
else if (WIFSIGNALED(exitstatus))
#if defined(WIN32)
snprintf(str, sizeof(str),
_("child process was terminated by exception 0x%X"),
WTERMSIG(exitstatus));
#elif defined(HAVE_DECL_SYS_SIGLIST) && HAVE_DECL_SYS_SIGLIST
{
char str2[256];
snprintf(str2, sizeof(str2), "%d: %s", WTERMSIG(exitstatus),
WTERMSIG(exitstatus) < NSIG ?
sys_siglist[WTERMSIG(exitstatus)] : "(unknown)");
snprintf(str, sizeof(str),
_("child process was terminated by signal %s"), str2);
}
#else
snprintf(str, sizeof(str),
_("child process was terminated by signal %d"),
WTERMSIG(exitstatus));
#endif
else
snprintf(str, sizeof(str),
_("child process exited with unrecognized status %d"),
exitstatus);
return pstrdup(str);
}
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