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/* SPDX-License-Identifier: ISC */
#include "service.h"
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <stdio.h>
int setup_tty(const char *tty, bool truncate)
{
int fd;
if (tty == NULL)
return 0;
fd = open(tty, O_RDWR);
if (fd < 0) {
perror(tty);
return -1;
}
if (truncate)
ftruncate(fd, 0);
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;
}
void argv_exec(exec_t *e)
{
char **argv = alloca(sizeof(char *) * (e->argc + 1)), *ptr;
int i;
for (ptr = e->args, i = 0; i < e->argc; ++i, ptr += strlen(ptr) + 1)
argv[i] = ptr;
argv[i] = NULL;
execvp(argv[0], argv);
perror(argv[0]);
exit(EXIT_FAILURE);
}
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