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#include <sysdeps.h>
#include <string.h>
#include <sys/wait.h>
#include <unistd.h>
#include <cli/cli.h>
#include <iobuf/iobuf.h>
#include <msg/msg.h>
#include <msg/wrap.h>
#include <net/socket.h>
#include <path/path.h>
#include <str/str.h>
#include "bcron.h"
static const char* user = 0;
static int cmd_list = 0;
static int cmd_remove = 0;
static int cmd_edit = 0;
static int cmd_listsys = 0;
const char program[] = "bcrontab";
const int msg_show_pid = 0;
const char cli_help_prefix[] = "\n";
const char cli_help_suffix[] = "";
const char cli_args_usage[] = "[ -u user ] file\n"
" or: bcrontab [ -u user ] { -l | -r | -e }";
const int cli_args_min = 0;
const int cli_args_max = 1;
cli_option cli_options[] = {
// { ch, name, type, value, ptr, help, default },
// type is:
// CLI_FLAG,
// CLI_COUNTER,
// CLI_INTEGER,
// CLI_UINTEGER,
// CLI_STRING,
// CLI_STRINGLIST,
// CLI_FUNCTION,
// CLI_SEPARATOR,
/* The following four options are required for compatability */
{ 'u', "user", CLI_STRING, 0, &user,
"Specify the user name", 0 },
{ 'l', "list", CLI_FLAG, 1, &cmd_list,
"List user's current crontab", 0 },
{ 'r', "remove", CLI_FLAG, 1, &cmd_remove,
"Remove user's current crontab", 0 },
{ 'y', "system", CLI_FLAG, 1, &cmd_listsys,
"List all system crontabs", 0 },
{ 'e', "edit", CLI_FLAG, 1, &cmd_edit,
"Edit user's current crontab", 0 },
/* Extended options */
{0,0,0,0,0,0,0}
};
static int do_connect(void)
{
const char* sockpath;
int sock;
if ((sockpath = getenv("BCRON_SOCKET")) == 0)
sockpath = SOCKET_PATH;
if ((sock = socket_unixstr()) == -1)
die1sys(111, "Could not create socket");
if (!socket_connectu(sock, sockpath))
die1sys(111, "Could not connect to bcron-spool");
return sock;
}
static str packet;
static int docmd(char cmd, str* data, int softfail)
{
int sock;
ibuf sockbuf;
packet.len = 0;
wrap_str(str_catc(&packet, cmd));
wrap_str(str_cats(&packet, user));
if (data) {
wrap_str(str_catc(&packet, 0));
wrap_str(str_cat(&packet, data));
}
sock = do_connect();
if (!ibuf_init(&sockbuf, sock, 0, IOBUF_NEEDSCLOSE, 0))
die1sys(111, "Could not initialize socket buffer");
if (sendpacket(sock, &packet) <= 0)
die1sys(111, "Could not send command to server");
if (!ibuf_getnetstring(&sockbuf, &packet))
die1sys(111, "Could not read response from server");
ibuf_close(&sockbuf);
if ((!softfail && packet.s[0] == 'D') || packet.s[0] == 'Z')
die1(111, packet.s+1);
return packet.s[0] != 'D';
}
static int do_list(void)
{
docmd('L', 0, 0);
return write(1, packet.s + 1, packet.len - 1) != (long)(packet.len - 1);
}
static int do_remove(void)
{
docmd('R', 0, 0);
return 0;
}
static int do_replace(const char* path)
{
static str file;
if (!ibuf_openreadclose(path, &file))
die3sys(111, "Could not read '", path, "'");
docmd('S', &file, 0);
msg1("crontab saved successfully");
return 0;
}
static void edit(const char* path)
{
const char* editor;
int pid;
static str cmd;
char* argv[4];
int status;
if ((editor = getenv("VISUAL")) == 0
&& (editor = getenv("EDITOR")) == 0)
editor = "vi";
if (!str_copys(&cmd, editor)
|| !str_cats(&cmd, " '")
|| !str_cats(&cmd, path)
|| !str_catc(&cmd, '\'')) {
unlink(path);
die_oom(111);
}
argv[0] = "/bin/sh";
argv[1] = "-c";
argv[2] = cmd.s;
argv[3] = 0;
if ((pid = fork()) == -1) {
unlink(path);
die1sys(111, "Could not fork editor");
}
if (pid == 0) {
/* Run editor in child */
execv(argv[0], argv);
die1sys(111, "Could not execute /bin/sh");
}
if (waitpid(pid, &status, 0) == -1) {
unlink(path);
die1sys(111, "Internal error");
}
if (!WIFEXITED(status)) {
unlink(path);
die1(111, "Editor crashed");
}
if (WEXITSTATUS(status) != 0) {
unlink(path);
exit(WEXITSTATUS(status));
}
}
static int do_edit(void)
{
str file = {0,0,0};
int fd;
if ((fd = tempfile("bcrontab")) == -1
&& (fd = tempfile("/tmp/bcrontab")) == -1)
die1sys(111, "Could not create temporary file");
if (!docmd('L', 0, 1))
wrap_str(str_copys(&packet, "K"));
if (write(fd, packet.s + 1, packet.len - 1) != (long)(packet.len - 1))
die1sys(111, "Could not copy crontab to temporary file");
close(fd);
edit(tempname.s);
/* Re-open the temporary file here because some editors will move the
original file aside before writing the new one. */
if (!ibuf_openreadclose(tempname.s, &file))
die1sys(111, "Could not re-read temporary file");
if (file.len == packet.len - 1
&& memcmp(file.s, packet.s + 1, file.len) == 0)
msg1("no changes made to crontab");
else
docmd('S', &file, 0);
return 0;
}
static int do_listsys(void)
{
docmd('Y', 0, 0);
return write(1, packet.s + 1, packet.len - 1) != (long)(packet.len - 1);
}
int cli_main(int argc, char* argv[])
{
if (user == 0
&& (user = getenv("LOGNAME")) == 0
&& (user = getenv("USER")) == 0)
die1(111, "Could not determine user name");
switch (cmd_list + cmd_remove + cmd_edit + cmd_listsys) {
case 0:
if (argc != 1)
usage(111, "Too few command-line arguments");
break;
case 1:
if (argc != 0)
usage(111, "Too many command-line arguments");
break;
default:
usage(111, "You must specify only one of -l, -r, -e, or -y");
}
if (cmd_list)
return do_list();
else if (cmd_remove)
return do_remove();
else if (cmd_edit)
return do_edit();
else if (cmd_listsys)
return do_listsys();
else /* cmd_replace */
return do_replace(argv[0]);
}
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