From c4199f22d0f7793b70db51c01783f0d45afce3d4 Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Fri, 1 Apr 2016 22:12:44 +0200
Subject: libbb: two new functions: wait_for_exitstatus(pid), xfchdir(fd)
Bartosz Golaszewski proposed xfchdir()
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
libbb/xfuncs.c | 12 ++++++++++++
libbb/xfuncs_printf.c | 6 ++++++
2 files changed, 18 insertions(+)
(limited to 'libbb')
diff --git a/libbb/xfuncs.c b/libbb/xfuncs.c
index 206edb4a0..3f9a84ad4 100644
--- a/libbb/xfuncs.c
+++ b/libbb/xfuncs.c
@@ -315,3 +315,15 @@ int FAST_FUNC wait4pid(pid_t pid)
return WTERMSIG(status) + 0x180;
return 0;
}
+
+// Useful when we do know that pid is valid, and we just want to wait
+// for it to exit. Not existing pid is fatal. waitpid() status is not returned.
+int FAST_FUNC wait_for_exitstatus(pid_t pid)
+{
+ int exit_status, n;
+
+ n = safe_waitpid(pid, &exit_status, 0);
+ if (n < 0)
+ bb_perror_msg_and_die("waitpid");
+ return exit_status;
+}
diff --git a/libbb/xfuncs_printf.c b/libbb/xfuncs_printf.c
index 73488908d..4aa1b5ce2 100644
--- a/libbb/xfuncs_printf.c
+++ b/libbb/xfuncs_printf.c
@@ -390,6 +390,12 @@ void FAST_FUNC xchdir(const char *path)
bb_perror_msg_and_die("can't change directory to '%s'", path);
}
+void FAST_FUNC xfchdir(int fd)
+{
+ if (fchdir(fd))
+ bb_perror_msg_and_die("fchdir");
+}
+
void FAST_FUNC xchroot(const char *path)
{
if (chroot(path))
--
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