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-rw-r--r--butl/process8
-rw-r--r--butl/process.cxx13
-rw-r--r--butl/process.ixx14
3 files changed, 31 insertions, 4 deletions
diff --git a/butl/process b/butl/process
index cf18acd..c810b58 100644
--- a/butl/process
+++ b/butl/process
@@ -59,6 +59,12 @@ namespace butl
//
process (char const* args[], process& in, int out = 1, int err = 2);
+ // Versions of the above constructors that allow us to change the
+ // current working directory of the child process.
+ //
+ process (const char* cwd, char const*[], int = 0, int = 1, int = 2);
+ process (const char* cwd, char const*[], process& in, int = 1, int = 2);
+
// Wait for the process to terminate. Return true if the process
// terminated normally and with the zero exit status. Throw
// process_error if anything goes wrong.
@@ -85,4 +91,6 @@ namespace butl
};
}
+#include <butl/process.ixx>
+
#endif // BUTL_PROCESS
diff --git a/butl/process.cxx b/butl/process.cxx
index a456217..9025bdb 100644
--- a/butl/process.cxx
+++ b/butl/process.cxx
@@ -5,7 +5,7 @@
#include <butl/process>
#ifndef _WIN32
-# include <unistd.h> // execvp, fork, dup2, pipe, {STDIN,STDERR}_FILENO
+# include <unistd.h> // execvp, fork, dup2, pipe, chdir, *_FILENO
# include <sys/wait.h> // waitpid
#else
# ifndef WIN32_LEAN_AND_MEAN
@@ -25,7 +25,7 @@ namespace butl
#ifndef _WIN32
process::
- process (char const* args[], int in, int out, int err)
+ process (const char* cwd, char const* args[], int in, int out, int err)
{
int out_fd[2] = {in, 0};
int in_ofd[2] = {0, out};
@@ -74,6 +74,11 @@ namespace butl
throw process_error (errno, true);
}
+ // Change current working directory if requested.
+ //
+ if (cwd != nullptr && chdir (cwd) != 0)
+ throw process_error (errno, true);
+
if (execvp (args[0], const_cast<char**> (&args[0])) == -1)
throw process_error (errno, true);
}
@@ -93,8 +98,8 @@ namespace butl
}
process::
- process (char const* args[], process& in, int out, int err)
- : process (args, in.in_ofd, out, err)
+ process (const char* cwd, char const* args[], process& in, int out, int err)
+ : process (cwd, args, in.in_ofd, out, err)
{
assert (in.in_ofd != -1); // Should be a pipe.
close (in.in_ofd); // Close it on our side.
diff --git a/butl/process.ixx b/butl/process.ixx
new file mode 100644
index 0000000..0506793
--- /dev/null
+++ b/butl/process.ixx
@@ -0,0 +1,14 @@
+// file : butl/process.ixx -*- C++ -*-
+// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+namespace butl
+{
+ inline process::
+ process (char const* args[], int in, int out, int err)
+ : process (nullptr, args, in, out, err) {}
+
+ inline process::
+ process (char const* args[], process& in, int out, int err)
+ : process (nullptr, args, in, out, err) {}
+}