mirror of https://github.com/pygos/init.git
52 lines
805 B
C
52 lines
805 B
C
/* SPDX-License-Identifier: ISC */
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#include "service.h"
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <stdio.h>
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int setup_tty(const char *tty, bool truncate)
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{
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int fd;
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if (tty == NULL)
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return 0;
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fd = open(tty, O_RDWR);
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if (fd < 0) {
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perror(tty);
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return -1;
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}
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if (truncate)
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ftruncate(fd, 0);
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close(STDIN_FILENO);
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close(STDOUT_FILENO);
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close(STDERR_FILENO);
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setsid();
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dup2(fd, STDIN_FILENO);
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dup2(fd, STDOUT_FILENO);
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dup2(fd, STDERR_FILENO);
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close(fd);
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return 0;
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}
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void argv_exec(exec_t *e)
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{
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char **argv = alloca(sizeof(char *) * (e->argc + 1)), *ptr;
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int i;
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for (ptr = e->args, i = 0; i < e->argc; ++i, ptr += strlen(ptr) + 1)
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argv[i] = ptr;
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argv[i] = NULL;
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execvp(argv[0], argv);
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perror(argv[0]);
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exit(EXIT_FAILURE);
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}
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