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terminal: lxc_terminal_allocate()

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Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2018-02-28 12:12:59 +01:00
parent 60dd8ef44f
commit 12c2eaaa0a
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GPG Key ID: 8EB056D53EECB12D
1 changed files with 13 additions and 6 deletions
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19
src/lxc/terminal.c
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@ -600,13 +600,18 @@ on_error:
int lxc_terminal_allocate(struct lxc_conf *conf, int sockfd, int *ttyreq) int lxc_terminal_allocate(struct lxc_conf *conf, int sockfd, int *ttyreq)
{ {
int masterfd = -1, ttynum; int ttynum;
int masterfd = -1;
struct lxc_tty_info *ttys = &conf->ttys; struct lxc_tty_info *ttys = &conf->ttys;
struct lxc_terminal *terminal = &conf->console; struct lxc_terminal *terminal = &conf->console;
if (*ttyreq == 0) { if (*ttyreq == 0) {
if (lxc_terminal_peer_proxy_alloc(terminal, sockfd) < 0) int ret;
ret = lxc_terminal_peer_proxy_alloc(terminal, sockfd);
if (ret < 0)
goto out; goto out;
masterfd = terminal->proxy.master; masterfd = terminal->proxy.master;
goto out; goto out;
} }
@ -618,16 +623,17 @@ int lxc_terminal_allocate(struct lxc_conf *conf, int sockfd, int *ttyreq)
if (ttys->tty[*ttyreq - 1].busy) if (ttys->tty[*ttyreq - 1].busy)
goto out; goto out;
/* the requested tty is available */ /* The requested tty is available. */
ttynum = *ttyreq; ttynum = *ttyreq;
goto out_tty; goto out_tty;
} }
/* search for next available tty, fixup index tty1 => [0] */ /* Search for next available tty, fixup index tty1 => [0]. */
for (ttynum = 1; ttynum <= ttys->nbtty && ttys->tty[ttynum - 1].busy; ttynum++) for (ttynum = 1; ttynum <= ttys->nbtty && ttys->tty[ttynum - 1].busy; ttynum++) {
; ;
}
/* we didn't find any available slot for tty */ /* We didn't find any available slot for tty. */
if (ttynum > ttys->nbtty) if (ttynum > ttys->nbtty)
goto out; goto out;
@ -636,6 +642,7 @@ int lxc_terminal_allocate(struct lxc_conf *conf, int sockfd, int *ttyreq)
out_tty: out_tty:
ttys->tty[ttynum - 1].busy = sockfd; ttys->tty[ttynum - 1].busy = sockfd;
masterfd = ttys->tty[ttynum - 1].master; masterfd = ttys->tty[ttynum - 1].master;
out: out:
return masterfd; return masterfd;
} }