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#include <bglibs/sysdeps.h>
#include <fcntl.h>
#include <pwd.h>
#include <unistd.h>
#include <bglibs/msg.h>
#include <bglibs/wrap.h>
#include <bglibs/str.h>
#include "bcron.h"
const char program[] = "bcron-start";
const int msg_show_pid = 0;
int main(int argc, char* argv[])
{
str path = {0,0,0};
int pipe1[2]; /* From -sched to -exec */
#ifdef IGNORE_EXEC
int devnull;
#else
int pipe2[2]; /* From -exec to -sched */
#endif
struct passwd* pw;
int slash;
const char* user;
if ((devnull = open("/dev/null", O_RDWR, 0)) == -1)
die1sys(111, "Could not open '/dev/null' for writing");
wrap_str(str_copys(&path, argv[0]));
if ((slash = str_findlast(&path, '/')) < 0)
path.len = slash = 0;
else
path.len = ++slash;
if ((user = getenv("BCRON_USER")) == 0)
user = BCRON_USER;
if ((pw = getpwnam(user)) == 0)
die1(111, "Could not look up cron user");
if (pipe(pipe1) != 0)
die1sys(111, "Could not create pipe");
wrap_str(str_cats(&path, "bcron-exec"));
switch (fork()) {
case -1:
die1sys(111, "Could not fork");
case 0:
dup2(pipe1[0], 0);
close(pipe1[0]);
close(pipe1[1]);
#ifdef IGNORE_EXEC
dup2(devnull, 1);
close(devnull);
#else
dup2(pipe2[1], 1);
close(pipe2[0]);
close(pipe2[1]);
#endif
argv[0] = path.s;
execvp(argv[0], argv);
die1sys(111, "Could not exec bcron-exec");
}
if (setgid(pw->pw_gid) != 0
|| setuid(pw->pw_uid) != 0)
die1sys(111, "Could not setuid");
path.len = slash;
wrap_str(str_cats(&path, "bcron-sched"));
argv[0] = path.s;
argv[1] = 0;
dup2(pipe1[1], 1);
close(pipe1[0]);
close(pipe1[1]);
#ifdef IGNORE_EXEC
dup2(devnull, 0);
close(devnull);
#else
dup2(pipe2[0], 0);
close(pipe2[0]);
close(pipe2[1]);
#endif
execvp(argv[0], argv);
die1sys(111, "Could not exec bcron-sched");
return 111;
(void)argc;
}
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