postgres/src/backend/port/nextstep/port.c

#ifndef _POSIX_SOURCE
#include <libc.h>
#else
#include <unistd.h>
#include <stdlib.h>
#endif

#include <string.h>
#include <sys/signal.h>


void
putenv(char *name)
{
	extern char **environ;
	static int	was_mallocated = 0;
	int			size;

	/* Compute the size of environ array including the final NULL */
	for (size = 1; environ[size++];)
		 /* nothing */ ;

	if (!was_mallocated)
	{
		char	  **tmp = environ;
		int			i;

		was_mallocated = 1;
		environ = malloc(size * sizeof(char *));
		for (i = 0; i < size; i++)
			environ[i] = tmp[i];
	}

	environ = realloc(environ, (size + 1) * sizeof(char *));
	environ[size - 1] = strcpy(malloc(strlen(name) + 1), name);
	environ[size] = NULL;
}

char	   *
strdup(const char *string)
{
	return strcpy(malloc(strlen(string) + 1), string);
}

#ifndef _POSIX_SOURCE
int
sigaddset(int *set, int signo)
{
	*set |= sigmask(signo);
	return *set;
}

int
sigemptyset(int *set)
{
	return (*set = 0);
}

char	   *
getcwd(char *buf, size_t size)
{
	return getwd(buf);
}

#endif