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Add a flag to run a background process in a pty as well, not used for

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anything yet.
This commit is contained in:
nicm
2020-03-19 13:43:18 +00:00
parent 581ed718e7
commit e8273a993e
6 changed files with 61 additions and 37 deletions
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80
job.c
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@@ -25,6 +25,7 @@
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <util.h>
#include "tmux.h"
@@ -69,18 +70,15 @@ static LIST_HEAD(joblist, job) all_jobs = LIST_HEAD_INITIALIZER(all_jobs);
struct job *
job_run(const char *cmd, struct session *s, const char *cwd,
job_update_cb updatecb, job_complete_cb completecb, job_free_cb freecb,
void *data, int flags)
void *data, int flags, int sx, int sy)
{
struct job *job;
struct environ *env;
pid_t pid;
int nullfd, out[2];
int nullfd, out[2], master;
const char *home;
sigset_t set, oldset;
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, out) != 0)
return (NULL);
log_debug("%s: cmd=%s, cwd=%s", __func__, cmd, cwd == NULL ? "" : cwd);
struct winsize ws;
/*
* Do not set TERM during .tmux.conf, it is nice to be able to use
@@ -90,13 +88,26 @@ job_run(const char *cmd, struct session *s, const char *cwd,
sigfillset(&set);
sigprocmask(SIG_BLOCK, &set, &oldset);
switch (pid = fork()) {
if (flags & JOB_PTY) {
memset(&ws, 0, sizeof ws);
ws.ws_col = sx;
ws.ws_row = sy;
pid = fdforkpty(ptm_fd, &master, NULL, NULL, &ws);
} else {
if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, out) != 0)
goto fail;
pid = fork();
}
log_debug("%s: cmd=%s, cwd=%s", __func__, cmd, cwd == NULL ? "" : cwd);
switch (pid) {
case -1:
sigprocmask(SIG_SETMASK, &oldset, NULL);
environ_free(env);
close(out[0]);
close(out[1]);
return (NULL);
if (~flags & JOB_PTY) {
close(out[0]);
close(out[1]);
}
goto fail;
case 0:
proc_clear_signals(server_proc, 1);
sigprocmask(SIG_SETMASK, &oldset, NULL);
@@ -109,22 +120,23 @@ job_run(const char *cmd, struct session *s, const char *cwd,
environ_push(env);
environ_free(env);
if (dup2(out[1], STDIN_FILENO) == -1)
fatal("dup2 failed");
if (dup2(out[1], STDOUT_FILENO) == -1)
fatal("dup2 failed");
if (out[1] != STDIN_FILENO && out[1] != STDOUT_FILENO)
close(out[1]);
close(out[0]);
nullfd = open(_PATH_DEVNULL, O_RDWR, 0);
if (nullfd == -1)
fatal("open failed");
if (dup2(nullfd, STDERR_FILENO) == -1)
fatal("dup2 failed");
if (nullfd != STDERR_FILENO)
close(nullfd);
if (~flags & JOB_PTY) {
if (dup2(out[1], STDIN_FILENO) == -1)
fatal("dup2 failed");
if (dup2(out[1], STDOUT_FILENO) == -1)
fatal("dup2 failed");
if (out[1] != STDIN_FILENO && out[1] != STDOUT_FILENO)
close(out[1]);
close(out[0]);
nullfd = open(_PATH_DEVNULL, O_RDWR, 0);
if (nullfd == -1)
fatal("open failed");
if (dup2(nullfd, STDERR_FILENO) == -1)
fatal("dup2 failed");
if (nullfd != STDERR_FILENO)
close(nullfd);
}
closefrom(STDERR_FILENO + 1);
execl(_PATH_BSHELL, "sh", "-c", cmd, (char *) NULL);
@@ -133,7 +145,6 @@ job_run(const char *cmd, struct session *s, const char *cwd,
sigprocmask(SIG_SETMASK, &oldset, NULL);
environ_free(env);
close(out[1]);
job = xmalloc(sizeof *job);
job->state = JOB_RUNNING;
@@ -150,7 +161,11 @@ job_run(const char *cmd, struct session *s, const char *cwd,
job->freecb = freecb;
job->data = data;
job->fd = out[0];
if (~flags & JOB_PTY) {
close(out[1]);
job->fd = out[0];
} else
job->fd = master;
setblocking(job->fd, 0);
job->event = bufferevent_new(job->fd, job_read_callback,
@@ -161,6 +176,11 @@ job_run(const char *cmd, struct session *s, const char *cwd,
log_debug("run job %p: %s, pid %ld", job, job->cmd, (long) job->pid);
return (job);
fail:
sigprocmask(SIG_SETMASK, &oldset, NULL);
environ_free(env);
return (NULL);
}
/* Kill and free an individual job. */
@@ -209,7 +229,7 @@ job_write_callback(__unused struct bufferevent *bufev, void *data)
log_debug("job write %p: %s, pid %ld, output left %zu", job, job->cmd,
(long) job->pid, len);
if (len == 0) {
if (len == 0 && (~job->flags & JOB_KEEPWRITE)) {
shutdown(job->fd, SHUT_WR);
bufferevent_disable(job->event, EV_WRITE);
}