source: vendor/current/source3/utils/interact.c

/*
 * Samba Unix/Linux SMB client library
 *
 * Copyright (C) Gregor Beck 2011
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @brief  Functions to interact with an user.
 * @author Gregor Beck <gb@sernet.de>
 * @date   Aug 2011
 *
 */

#include "includes.h"
#include "system/filesys.h"

#include "interact.h"

#include <termios.h>

static const char* get_editor(void) {
        static char editor[64] = {0};

        if (editor[0] == '\0') {
                const char *tmp = getenv("VISUAL");
                if (tmp == NULL) {
                        tmp = getenv("EDITOR");
                }
                if (tmp == NULL) {
                        tmp = "vi";
                }
                snprintf(editor, sizeof(editor), "%s", tmp);
        }

        return editor;
}

int interact_prompt(const char* msg, const char* acc, char def) {
        struct termios old_tio, new_tio;
        int c;

        tcgetattr(STDIN_FILENO, &old_tio);
        new_tio=old_tio;
        new_tio.c_lflag &=(~ICANON & ~ECHO);
        tcsetattr(STDIN_FILENO, TCSANOW, &new_tio);

        do {
                d_printf("%s? [%c]\n", msg, def);
                fflush(stdout);
                c = getchar();
                if (c == '\n') {
                        c = def;
                        break;
                }
                else if (strchr(acc, tolower(c)) != NULL) {
                        break;
                }
                d_printf("Invalid input '%c'\n", c);
        } while(c != EOF);
        tcsetattr(STDIN_FILENO, TCSANOW, &old_tio);
        return c;
}


char* interact_edit(TALLOC_CTX* mem_ctx, const char* str) {
        char fname[] = "/tmp/net_idmap_check.XXXXXX";
        char buf[128];
        char* ret = NULL;
        FILE* file;
        mode_t mask;
        int fd;

        mask = umask(S_IRWXO | S_IRWXG);
        fd = mkstemp(fname);
        umask(mask);
        if (fd == -1) {
                DEBUG(0, ("failed to mkstemp %s: %s\n", fname,
                          strerror(errno)));
                return NULL;
        }

        file  = fdopen(fd, "w");
        if (!file) {
                DEBUG(0, ("failed to open %s for writing: %s\n", fname,
                          strerror(errno)));
                close(fd);
                unlink(fname);
                return NULL;
        }

        fprintf(file, "%s", str);
        fclose(file);

        snprintf(buf, sizeof(buf), "%s %s\n", get_editor(), fname);
        if (system(buf) != 0) {
                DEBUG(0, ("failed to start editor %s: %s\n", buf,
                          strerror(errno)));
                unlink(fname);
                return NULL;
        }

        file = fopen(fname, "r");
        if (!file) {
                DEBUG(0, ("failed to open %s for reading: %s\n", fname,
                          strerror(errno)));
                unlink(fname);
                return NULL;
        }
        while ( fgets(buf, sizeof(buf), file) ) {
                ret = talloc_strdup_append(ret, buf);
        }
        fclose(file);
        unlink(fname);

        return talloc_steal(mem_ctx, ret);
}



/*Local Variables:*/
/*mode: c*/
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