/**
* MIT/X Consortium License
*
* Copyright © 2015 Mattias Andrée <maandree@member.fsf.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "bus.h"
/**
* Statement wrapper that goes to `fail` on failure
*/
#define t(inst) if ((inst) == -1) goto fail
char *argv0;
static const char *command;
static int
get_keys(void)
{
int saved_errno;
char *line;
size_t len;
line = NULL, len = 0;
t(getline(&line, &len, stdin));
t(key_sem = (key_t)atoll(line));
free(line);
line = NULL, len = 0;
t(getline(&line, &len, stdin));
t(key_shm = (key_t)atoll(line));
free(line);
return 0;
fail:
saved_errno = errno;
free(line);
errno = saved_errno;
return -1;
}
static int
spawn_continue(const char *message)
{
pid_t pid = fork();
if (pid)
return pid == -1 ? -1 : 1;
setenv("arg", message, 1);
execlp("sh", "sh", "-c", command, NULL);
perror(argv0);
exit(1);
}
static int
spawn_break(const char *message)
{
pid_t pid = fork();
if (pid)
return pid == -1 ? -1 : 0;
setenv("arg", message, 1);
execlp("sh", "sh", "-c", command, NULL);
perror(argv0);
exit(1);
}
int
main(int argc, char *argv[])
{
bus_t bus;
argv0 = *argv;
if ((argc == 3) && !strcmp(argv[1], "create")) {
t(bus_create(argv[2], 0) ? 0 : -1);
} else if ((argc == 2) && !strcmp(argv[1], "create")) {
char *file = bus_create(NULL, 0);
t(file ? 0 : -1);
printf("%s\n", file);
} else if ((argc == 3) && !strcmp(argv[1], "remove")) {
t(bus_unlink(argv[2]));
} else if ((argc == 4) && !strcmp(argv[1], "listen")) {
command = argv[3];
t(bus_open(&bus, argv[2], BUS_RDONLY));
t(bus_read(&bus, spawn_continue, NULL));
t(bus_close(&bus));
} else if ((argc == 4) && !strcmp(argv[1], "wait")) {
command = argv[3];
t(bus_open(&bus, argv[2], BUS_RDONLY));
t(bus_read(&bus, spawn_break, NULL));
t(bus_close(&bus));
} else if ((argc == 4) && !strcmp(argv[1], "broadcast")) {
t(bus_open(&bus, argv[2], BUS_WRONLY));
t(bus_write(&bus, argv[3]))
t(bus_close(&bus));
} else
return 2;
return 0;
fail:
perror(argv0);
return 1;
}
#undef t
