pager.c

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#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
 
#include <unistd.h>
 
#include <grass/gis.h>
 
#ifdef SIGPIPE
static void (*sigpipe)(int);
#endif
 
FILE *G_open_pager(struct Popen *pager)
{
    const char *program = getenv("GRASS_PAGER");
    FILE *fp;
 
    G_popen_clear(pager);
 
    if (!program)
        return stdout;
 
    if (!isatty(STDOUT_FILENO))
        return stdout;
 
#ifdef SIGPIPE
    sigpipe = signal(SIGPIPE, SIG_IGN);
#endif
 
    fp = G_popen_write(pager, program, NULL);
 
    return fp ? fp : stdout;
}
 
void G_close_pager(struct Popen *pager)
{
    G_popen_close(pager);
 
#ifdef SIGPIPE
    if (sigpipe)
        signal(SIGPIPE, sigpipe);
#endif
}
 
FILE *G_open_mail(struct Popen *mail)
{
    const char *user = G_whoami();
    const char *argv[3];
    FILE *fp;
 
    G_popen_clear(mail);
 
    if (!user || !*user)
        return NULL;
 
    argv[0] = "mail";
    argv[1] = user;
    argv[2] = NULL;
 
    fp = G_popen_write(mail, "mail", argv);
 
    return fp;
}
 
void G_close_mail(struct Popen *mail)
{
    G_popen_close(mail);
}