File: error.c

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#include <stdio.h>
#include <unistd.h>
#include "gis.h"
#include "local_proto.h"
extern FILE *tracefd;

int error (char *a, char *b, char *c)
{
    char msg[2000];

    sprintf (msg, "%s%s%s : %s", a, *b?" ":"",b, c);

    if (tracefd != NULL
    && !(isatty(fileno(tracefd)) && isatty(fileno(stderr))))
	fprintf (tracefd, "## error: %s\n", c);

    if (isatty(0))
	fprintf (stderr, "%s\n", msg);
    else
	G_fatal_error (msg);
    reject();

    return 0;
}