fish-shell/print_help.cpp

/** \file print_help.c
  Print help message for the specified command
*/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "print_help.h"

#define CMD_LEN 1024

#define HELP_ERR "Could not show help message\n"

/* defined in common.h */
ssize_t write_loop(int fd, const char *buff, size_t count);


void print_help( const char *c, int fd )
{
  char cmd[ CMD_LEN];
  int printed = snprintf( cmd, CMD_LEN, "fish -c '__fish_print_help %s >&%d'", c, fd );

  if( printed < CMD_LEN )
  {
    if( (system( cmd ) == -1) )
    {
      write_loop(2, HELP_ERR, strlen(HELP_ERR));
    }

  }

}