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#include <sys/wait.h>
#include <signal.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include "init.h"
extern char **environ;
static NORETURN void split_and_exec(char *cmd)
{
char *argv[128];
size_t i = 0;
while (*cmd != '\0') {
argv[i++] = cmd; /* FIXME: buffer overflow!! */
while (*cmd != '\0' && !isspace(*cmd))
++cmd;
if (isspace(*cmd)) {
*(cmd++) = '\0';
while (isspace(*cmd))
++cmd;
}
}
argv[i] = NULL;
execve(argv[0], argv, environ);
perror(argv[0]);
exit(EXIT_FAILURE);
}
static int child_setup(const char *ctty)
{
sigset_t mask;
int fd;
sigemptyset(&mask);
sigprocmask(SIG_SETMASK, &mask, NULL);
if (ctty != NULL) {
fd = open(ctty, O_RDWR);
if (fd < 0) {
perror(ctty);
return -1;
}
close(STDIN_FILENO);
close(STDOUT_FILENO);
close(STDERR_FILENO);
setsid();
dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
close(fd);
}
return 0;
}
int runlst_wait(char **exec, size_t num, const char *ctty)
{
pid_t ret, pid;
int status;
size_t i;
for (i = 0; i < num; ++i) {
pid = fork();
if (pid == 0) {
if (child_setup(ctty))
exit(EXIT_FAILURE);
split_and_exec(exec[i]);
}
if (pid == -1) {
perror("fork");
return EXIT_FAILURE;
}
do {
ret = waitpid(pid, &status, 0);
} while (ret != pid);
if (!WIFEXITED(status))
return EXIT_FAILURE;
if (WEXITSTATUS(status) != EXIT_SUCCESS)
return WEXITSTATUS(status);
}
return EXIT_SUCCESS;
}
pid_t runlst(char **exec, size_t num, const char *ctty)
{
int status;
pid_t pid;
pid = fork();
if (pid == 0) {
if (child_setup(ctty))
exit(EXIT_FAILURE);
if (num > 1) {
status = runlst_wait(exec, num, NULL);
exit(status);
} else {
split_and_exec(exec[0]);
}
}
if (pid == -1)
perror("fork");
return pid;
}
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