diff options
Diffstat (limited to 'scripts/generator-internals.c')
| -rw-r--r-- | scripts/generator-internals.c | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/scripts/generator-internals.c b/scripts/generator-internals.c deleted file mode 100644 index 733e8189c..000000000 --- a/scripts/generator-internals.c +++ /dev/null @@ -1,221 +0,0 @@ -/* - * Copyright (C) 2018 Red Hat, Inc. All rights reserved. - * - * This file is part of the device-mapper userspace tools. - * - * This copyrighted material is made available to anyone wishing to use, - * modify, copy, or redistribute it subject to the terms and conditions - * of the GNU General Public License v.2. - * - * 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 -*/ - -// This file contains the unit testable parts of -// lvm2_activation_generator_systemd_red_hat - -#include "device_mapper/all.h" - -#include <ctype.h> -#include <errno.h> -#include <fcntl.h> -#include <limits.h> /* For PATH_MAX for musl libc */ -#include <stdarg.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <syslog.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <sys/wait.h> -#include <unistd.h> - -//---------------------------------------------------------------- - -static void _error(const char *format, ...) __attribute__ ((format(printf, 1, 2))); - -//---------------------------------------------------------------- - -// I'm rolling my own version of popen() here because I do not want to -// go through the shell. - -struct child_process { - pid_t pid; - FILE *fp; -}; - -static bool _open_child(struct child_process *child, const char *cmd, const char *argv[]) -{ - int r, pipe_fd[2]; - - r = pipe(pipe_fd); - if (r < 0) { - _error("call to pipe() failed: %d\n", r); - return false; - } - - child->pid = fork(); - if (child->pid < 0) { - (void) close(pipe_fd[0]); - (void) close(pipe_fd[1]); - _error("call to fork() failed: %d\n", r); - return false; - } - - if (child->pid == 0) { - // child - (void) close(pipe_fd[0]); - if (pipe_fd[1] != STDOUT_FILENO) { - (void) dup2(pipe_fd[1], STDOUT_FILENO); - (void) close(pipe_fd[1]); - } - - /* Suppressing any use of syslog */ - (void) setenv("LVM_SUPPRESS_SYSLOG", "1", 1); - - if (execv(cmd, (char *const *) argv) < 0) - _error("execv failed: %s\n", strerror(errno)); - // Shouldn't get here unless exec failed. - exit(1); - } else { - // parent - (void) close(pipe_fd[1]); - child->fp = fdopen(pipe_fd[0], "r"); - if (!child->fp) { - _error("call to fdopen() failed\n"); - return false; - } - } - - return true; -} - -// Returns the child's exit status -static bool _close_child(struct child_process *child) -{ - int status; - - (void) fclose(child->fp); - - while (waitpid(child->pid, &status, 0) < 0) - if (errno != EINTR) - return -1; - - if (WIFEXITED(status) && !WEXITSTATUS(status)) - return true; - - return false; -} - -//---------------------------------------------------------------- -// Aquiring config from the lvmconfig process - -#define LVM_CONF_EVENT_ACTIVATION "global/event_activation" -#define LVM_CONF_USE_LVMPOLLD "global/use_lvmpolld" - -struct config { - bool event_activation; - bool sysinit_needed; -}; - -static bool _begins_with(const char *line, const char *prefix, const char **rest) -{ - size_t len = strlen(prefix); - - if (strlen(line) < len) - return false; - - if (strncmp(line, prefix, len)) - return false; - - *rest = line + len; - - return true; -} - -static bool _parse_bool(const char *val, bool * result) -{ - const char *b = val, *e; - - while (*b && isspace(*b)) - b++; - - if (!*b) - goto parse_error; - - e = b; - while (*e && !isspace(*e)) - e++; - - if ((e - b) != 1) - goto parse_error; - - // We only handle '1', or '0' - if (*b == '1') { - *result = true; - return true; - - } else if (*b == '0') { - *result = false; - return true; - } - // Fallthrough - - parse_error: - _error("couldn't parse bool value '%s'\n", val); - return false; -} - -static bool _parse_line(const char *line, struct config *cfg) -{ - const char *val; - - if (_begins_with(line, "event_activation=", &val)) { - return _parse_bool(val, &cfg->event_activation); - - } else if (_begins_with(line, "use_lvmpolld=", &val)) { - bool r; - if (!_parse_bool(val, &r)) - return false; - cfg->sysinit_needed = !r; - return true; - } - - return false; -} - -static bool _get_config(struct config *cfg, const char *lvmconfig_path) -{ - static const char *_argv[] = { - "lvmconfig", "--type", "full", - LVM_CONF_EVENT_ACTIVATION, LVM_CONF_USE_LVMPOLLD, NULL - }; - - bool r = true; - char buffer[256]; - struct child_process child; - - cfg->event_activation = false; - cfg->sysinit_needed = true; - - if (!_open_child(&child, lvmconfig_path, _argv)) { - _error("couldn't open lvmconfig process\n"); - return false; - } - - while (fgets(buffer, sizeof(buffer), child.fp)) { - if (!_parse_line(buffer, cfg)) { - _error("_parse_line() failed\n"); - r = false; - } - } - - if (!_close_child(&child)) { - _error("lvmconfig failed\n"); - r = false; - } - - return r; -} |