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spawn: add optional stdin/stdout/stderr redirection FDs

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If not -1, spawn() will redirect the child's stdin/stdout/stderr to
these FDs.
This commit is contained in:
Daniel Eklöf 2020-07-15 13:33:56 +02:00
parent 57f5cc1bf2
commit 69d9ff3f25
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GPG key ID: 5BBD4992C116573F
3 changed files with 11 additions and 5 deletions
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10
spawn.c
View file

@ -13,7 +13,8 @@
#include "log.h"
bool
spawn(struct reaper *reaper, const char *cwd, char *const argv[])
spawn(struct reaper *reaper, const char *cwd, char *const argv[],
int stdin_fd, int stdout_fd, int stderr_fd)
{
int pipe_fds[2] = {-1, -1};
if (pipe2(pipe_fds, O_CLOEXEC) < 0) {
@ -30,8 +31,11 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[])
if (pid == 0) {
/* Child */
close(pipe_fds[0]);
if ((cwd != NULL && chdir(cwd) < 0) ||
//execlp(term->foot_exe, term->foot_exe, NULL) < 0)
if ((stdin_fd >= 0 && (dup2(stdin_fd, STDIN_FILENO) < 0 || close(stdin_fd) < 0)) ||
(stdout_fd >= 0 && (dup2(stdout_fd, STDOUT_FILENO) < 0 || close(stdout_fd) < 0)) ||
(stderr_fd >= 0 && (dup2(stderr_fd, STDERR_FILENO) < 0 || close(stderr_fd) < 0)) ||
(cwd != NULL && chdir(cwd) < 0) ||
execvp(argv[0], argv) < 0)
{
(void)!write(pipe_fds[1], &errno, sizeof(errno));