diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/rc/Makefile | 4 | ||||
| -rw-r--r-- | src/rc/rc-pipes.c | 57 | ||||
| -rw-r--r-- | src/rc/rc-pipes.h | 18 |
3 files changed, 77 insertions, 2 deletions
diff --git a/src/rc/Makefile b/src/rc/Makefile index 5e2a5e94..4b0983b5 100644 --- a/src/rc/Makefile +++ b/src/rc/Makefile @@ -5,8 +5,8 @@ include ${MK}/os.mk SRCS= checkpath.c do_e.c do_mark_service.c do_service.c \ do_value.c fstabinfo.c is_newer_than.c is_older_than.c \ mountinfo.c openrc-run.c rc-abort.c rc.c \ - rc-depend.c rc-logger.c rc-misc.c rc-plugin.c \ - rc-service.c rc-status.c rc-update.c \ + rc-depend.c rc-logger.c rc-misc.c rc-pipes.c \ + rc-plugin.c rc-service.c rc-status.c rc-update.c \ shell_var.c start-stop-daemon.c supervise-daemon.c swclock.c _usage.c ifeq (${MKSELINUX},yes) diff --git a/src/rc/rc-pipes.c b/src/rc/rc-pipes.c new file mode 100644 index 00000000..55f3ff8d --- /dev/null +++ b/src/rc/rc-pipes.c @@ -0,0 +1,57 @@ +/* + * rc-pipes.c + * Helper to handle spawning processes and connecting them to pipes. + */ + +/* + * Copyright (c) 2018 The OpenRC Authors. + * See the Authors file at the top-level directory of this distribution and + * https://github.com/OpenRC/openrc/blob/master/AUTHORS + * + * This file is part of OpenRC. It is subject to the license terms in + * the LICENSE file found in the top-level directory of this + * distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE + * This file may not be copied, modified, propagated, or distributed + * except according to the terms contained in the LICENSE file. + */ + +#include <stdlib.h> +#include <unistd.h> +#include <sys/types.h> + +#include "rc-pipe-command.h" + +static const int pipe_read_end = 0; +static const int pipe_write_end = 1; + +/* + * Starts a command with stdin redirected from a pipe + * Returns the write end of the pipe or -1 + */ +int rc_pipe_command(char *cmd) +{ + int pfd[2]; + pid_t pid; + + if (pipe(pfd) < 0) + return -1; + + pid = fork(); + if (pid < 0) + return -1; + else if (pid > 0) { + /* parent */ + close(pfd[0]); + return pfd[pipe_write_end]; + } else if (pid == 0) { + /* child */ + close(pfd[pipe_write_end]); + if (pfd[0] != STDIN_FILENO) { + if (dup2(pfd[0], STDIN_FILENO) < 0) + exit(1); + close(pfd[0]); + } + execl("/bin/sh", "sh", "-c", cmd, NULL); + exit(1); + } +} diff --git a/src/rc/rc-pipes.h b/src/rc/rc-pipes.h new file mode 100644 index 00000000..0c605ced --- /dev/null +++ b/src/rc/rc-pipes.h @@ -0,0 +1,18 @@ +/* + * Copyright (c) 2018 The OpenRC Authors. + * See the Authors file at the top-level directory of this distribution and + * https://github.com/OpenRC/openrc/blob/master/AUTHORS + * + * This file is part of OpenRC. It is subject to the license terms in + * the LICENSE file found in the top-level directory of this + * distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE + * This file may not be copied, modified, propagated, or distributed + * except according to the terms contained in the LICENSE file. + */ + +#ifndef RC_PIPES_H +#define RC_PIPES_H + +int rc_pipe_command(char *cmd); + +#endif |