[PATCH] kvm tools: Use correct data type for pid

[Sasha Levin <levinsasha928@gmail.com>]

This patch fixes an error where pids used u64 instead of pid_t, causing them
to never be negative.

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
---
 tools/kvm/builtin-balloon.c |    4 ++--
 tools/kvm/builtin-debug.c   |    4 ++--
 tools/kvm/builtin-pause.c   |    4 ++--
 tools/kvm/builtin-resume.c  |    4 ++--
 tools/kvm/builtin-stat.c    |    4 ++--
 tools/kvm/builtin-stop.c    |    4 ++--
 tools/kvm/include/kvm/kvm.h |    2 +-
 tools/kvm/kvm.c             |    5 +++--
 8 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/tools/kvm/builtin-balloon.c b/tools/kvm/builtin-balloon.c
index cb7d552..7329063 100644
--- a/tools/kvm/builtin-balloon.c
+++ b/tools/kvm/builtin-balloon.c
@@ -8,7 +8,7 @@
 #include <kvm/parse-options.h>
 #include <kvm/kvm.h>
 
-static u64 instance_pid;
+static pid_t instance_pid;
 static const char *instance_name;
 static u64 inflate;
 static u64 deflate;
@@ -21,7 +21,7 @@ static const char * const balloon_usage[] = {
 static const struct option balloon_options[] = {
 	OPT_GROUP("Instance options:"),
 	OPT_STRING('n', "name", &instance_name, "name", "Instance name"),
-	OPT_U64('p', "pid", &instance_pid, "Instance pid"),
+	OPT_INTEGER('p', "pid", &instance_pid, "Instance pid"),
 	OPT_GROUP("Balloon options:"),
 	OPT_U64('i', "inflate", &inflate, "Amount to inflate"),
 	OPT_U64('d', "deflate", &deflate, "Amount to deflate"),
diff --git a/tools/kvm/builtin-debug.c b/tools/kvm/builtin-debug.c
index 43da16d..4be12cc 100644
--- a/tools/kvm/builtin-debug.c
+++ b/tools/kvm/builtin-debug.c
@@ -9,7 +9,7 @@
 #include <signal.h>
 
 static bool all;
-static u64 instance_pid;
+static pid_t instance_pid;
 static const char *instance_name;
 
 static const char * const debug_usage[] = {
@@ -21,7 +21,7 @@ static const struct option debug_options[] = {
 	OPT_GROUP("General options:"),
 	OPT_BOOLEAN('a', "all", &all, "Debug all instances"),
 	OPT_STRING('n', "name", &instance_name, "name", "Instance name"),
-	OPT_U64('p', "pid", &instance_pid, "Instance pid"),
+	OPT_INTEGER('p', "pid", &instance_pid, "Instance pid"),
 	OPT_END()
 };
 
diff --git a/tools/kvm/builtin-pause.c b/tools/kvm/builtin-pause.c
index e4efb08..7b644ff 100644
--- a/tools/kvm/builtin-pause.c
+++ b/tools/kvm/builtin-pause.c
@@ -9,7 +9,7 @@
 #include <signal.h>
 
 static bool all;
-static u64 instance_pid;
+static pid_t instance_pid;
 static const char *instance_name;
 
 static const char * const pause_usage[] = {
@@ -21,7 +21,7 @@ static const struct option pause_options[] = {
 	OPT_GROUP("General options:"),
 	OPT_BOOLEAN('a', "all", &all, "Pause all instances"),
 	OPT_STRING('n', "name", &instance_name, "name", "Instance name"),
-	OPT_U64('p', "pid", &instance_pid, "Instance pid"),
+	OPT_INTEGER('p', "pid", &instance_pid, "Instance pid"),
 	OPT_END()
 };
 
diff --git a/tools/kvm/builtin-resume.c b/tools/kvm/builtin-resume.c
index 0c11cec..70de0fc 100644
--- a/tools/kvm/builtin-resume.c
+++ b/tools/kvm/builtin-resume.c
@@ -9,7 +9,7 @@
 #include <signal.h>
 
 static bool all;
-static u64 instance_pid;
+static pid_t instance_pid;
 static const char *instance_name;
 
 static const char * const resume_usage[] = {
@@ -21,7 +21,7 @@ static const struct option resume_options[] = {
 	OPT_GROUP("General options:"),
 	OPT_BOOLEAN('a', "all", &all, "Resume all instances"),
 	OPT_STRING('n', "name", &instance_name, "name", "Instance name"),
-	OPT_U64('p', "pid", &instance_pid, "Instance pid"),
+	OPT_INTEGER('p', "pid", &instance_pid, "Instance pid"),
 	OPT_END()
 };
 
diff --git a/tools/kvm/builtin-stat.c b/tools/kvm/builtin-stat.c
index d9bc75d..be12d15 100644
--- a/tools/kvm/builtin-stat.c
+++ b/tools/kvm/builtin-stat.c
@@ -10,7 +10,7 @@
 
 static bool mem;
 static bool all;
-static u64 instance_pid;
+static pid_t instance_pid;
 static const char *instance_name;
 
 static const char * const stat_usage[] = {
@@ -24,7 +24,7 @@ static const struct option stat_options[] = {
 	OPT_GROUP("Instance options:"),
 	OPT_BOOLEAN('a', "all", &all, "All instances"),
 	OPT_STRING('n', "name", &instance_name, "name", "Instance name"),
-	OPT_U64('p', "pid", &instance_pid, "Instance pid"),
+	OPT_INTEGER('p', "pid", &instance_pid, "Instance pid"),
 	OPT_END()
 };
 
diff --git a/tools/kvm/builtin-stop.c b/tools/kvm/builtin-stop.c
index d16618a..fd0500e 100644
--- a/tools/kvm/builtin-stop.c
+++ b/tools/kvm/builtin-stop.c
@@ -9,7 +9,7 @@
 #include <signal.h>
 
 static bool all;
-static u64 instance_pid;
+static pid_t instance_pid;
 static const char *instance_name;
 
 static const char * const stop_usage[] = {
@@ -21,7 +21,7 @@ static const struct option stop_options[] = {
 	OPT_GROUP("General options:"),
 	OPT_BOOLEAN('a', "all", &all, "Stop all instances"),
 	OPT_STRING('n', "name", &instance_name, "name", "Instance name"),
-	OPT_U64('p', "pid", &instance_pid, "Instance pid"),
+	OPT_INTEGER('p', "pid", &instance_pid, "Instance pid"),
 	OPT_END()
 };
 
diff --git a/tools/kvm/include/kvm/kvm.h b/tools/kvm/include/kvm/kvm.h
index c2d815c..d471cee 100644
--- a/tools/kvm/include/kvm/kvm.h
+++ b/tools/kvm/include/kvm/kvm.h
@@ -73,7 +73,7 @@ bool kvm__deregister_mmio(struct kvm *kvm, u64 phys_addr);
 void kvm__pause(void);
 void kvm__continue(void);
 void kvm__notify_paused(void);
-int kvm__get_pid_by_instance(const char *name);
+pid_t kvm__get_pid_by_instance(const char *name);
 int kvm__enumerate_instances(int (*callback)(const char *name, int pid));
 void kvm__remove_pidfile(const char *name);
 
diff --git a/tools/kvm/kvm.c b/tools/kvm/kvm.c
index 30aef3a..bbfdea2 100644
--- a/tools/kvm/kvm.c
+++ b/tools/kvm/kvm.c
@@ -142,9 +142,10 @@ void kvm__remove_pidfile(const char *name)
 	unlink(full_name);
 }
 
-int kvm__get_pid_by_instance(const char *name)
+pid_t kvm__get_pid_by_instance(const char *name)
 {
-	int fd, pid;
+	int fd;
+	pid_t pid;
 	char pid_str[10], pid_file[PATH_MAX];
 
 	sprintf(pid_file, "%s/%s/%s.pid", HOME_DIR, KVM_PID_FILE_PATH, name);
-- 
1.7.6