[PATCH 2 of 3] chg: add pgid to hgclient struct

[Jun Wu]

# HG changeset patch
# User Jun Wu <quark at fb.com>
# Date 1468793159 -3600
#      Sun Jul 17 23:05:59 2016 +0100
# Node ID 57234c11a5d542865e7360b7b943793e4fd110f7
# Parent  2278b2c5638684efdd9d39ad1e1bc2f691f12b1e
# Available At https://bitbucket.org/quark-zju/hg-draft
#              hg pull https://bitbucket.org/quark-zju/hg-draft -r 57234c11a5d5
chg: add pgid to hgclient struct

The previous patch makes the server tell the client its pgid. This patch
stores it in hgclient_t and adds a function to get it.

diff --git a/contrib/chg/hgclient.c b/contrib/chg/hgclient.c
--- a/contrib/chg/hgclient.c
+++ b/contrib/chg/hgclient.c
@@ -63,6 +63,7 @@ typedef struct {
 
 struct hgclient_tag_ {
 	int sockfd;
+	pid_t pgid;
 	pid_t pid;
 	context_t ctx;
 	unsigned int capflags;
@@ -339,6 +340,8 @@ static void readhello(hgclient_t *hgc)
 			u = dataend;
 		if (strncmp(s, "capabilities:", t - s + 1) == 0) {
 			hgc->capflags = parsecapabilities(t + 2, u);
+		} else if (strncmp(s, "pgid:", t - s + 1) == 0) {
+			hgc->pgid = strtol(t + 2, NULL, 10);
 		} else if (strncmp(s, "pid:", t - s + 1) == 0) {
 			hgc->pid = strtol(t + 2, NULL, 10);
 		}
@@ -463,6 +466,12 @@ void hgc_close(hgclient_t *hgc)
 	free(hgc);
 }
 
+pid_t hgc_peerpgid(const hgclient_t *hgc)
+{
+	assert(hgc);
+	return hgc->pgid;
+}
+
 pid_t hgc_peerpid(const hgclient_t *hgc)
 {
 	assert(hgc);
diff --git a/contrib/chg/hgclient.h b/contrib/chg/hgclient.h
--- a/contrib/chg/hgclient.h
+++ b/contrib/chg/hgclient.h
@@ -18,6 +18,7 @@ typedef struct hgclient_tag_ hgclient_t;
 hgclient_t *hgc_open(const char *sockname);
 void hgc_close(hgclient_t *hgc);
 
+pid_t hgc_peerpgid(const hgclient_t *hgc);
 pid_t hgc_peerpid(const hgclient_t *hgc);
 
 const char **hgc_validate(hgclient_t *hgc, const char *const args[],