diff options
Diffstat (limited to 'utils.c')
| -rw-r--r-- | utils.c | 55 |
1 files changed, 55 insertions, 0 deletions
@@ -1,4 +1,31 @@ +/* uroot - User's root + * utils.c Source file with various utility functions + * + * Copyright (C) 2018 Karel Kočí + * + * 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 2 + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ +#define _GNU_SOURCE +#include <stdio.h> +#include <stdlib.h> +#include <stdarg.h> +#include <sys/types.h> +#include <unistd.h> +#include <sys/wait.h> #include "utils.h" +#include "conf.h" // Compute the size needed (including \0) to format given message size_t printf_len(const char *msg, ...) { @@ -17,3 +44,31 @@ char *printf_into(char *dst, const char *msg, ...) { va_end(args); return dst; } + +const char *get_shell() { + const char *ret; + ret = secure_getenv("SHELL"); + if (!ret) + ret = DEFAULT_SHELL; + return ret; +} + +int new_map_id(const char *idtp, pid_t pid, int id) { + // TODO check /etc/sub* for current user subids and map them + pid_t chld = fork(); + if (!chld) { + char *tool = aprintf("new%smap", idtp); + char *const args[] = { + tool, aprintf("%d", pid), + "0", aprintf("%d", id), "1", + "1", "65537", "65536", + NULL + }; + execvp(tool, args); + abort(); + } + int stat; + waitpid(chld, &stat, 0); + return stat; +} + |