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-rw-r--r--vest/libcall.pl71
1 files changed, 71 insertions, 0 deletions
diff --git a/vest/libcall.pl b/vest/libcall.pl
new file mode 100644
index 00000000..c7d0f128
--- /dev/null
+++ b/vest/libcall.pl
@@ -0,0 +1,71 @@
+use IPC::Open3;
+use Symbol qw(gensym);
+
+$DUMMY_STDERR = gensym();
+$DUMMY_STDIN = gensym();
+
+# Run the command and ignore failures
+sub unchecked_call {
+ system("@_")
+}
+
+# Run the command and return its output, if any ignoring failures
+sub unchecked_output {
+ return `@_`
+}
+
+# WARNING: Do not use this for commands that will return large amounts
+# of stdout or stderr -- they might block indefinitely
+sub check_output {
+ print STDERR "Executing and gathering output: @_\n";
+
+ my $pid = open3($DUMMY_STDIN, \*PH, $DUMMY_STDERR, @_);
+ my $proc_output = "";
+ while( <PH> ) {
+ $proc_output .= $_;
+ }
+ waitpid($pid, 0);
+ # TODO: Grab signal that the process died from
+ my $child_exit_status = $? >> 8;
+ if($child_exit_status == 0) {
+ return $proc_output;
+ } else {
+ print STDERR "ERROR: Execution of @_ failed.\n";
+ exit(1);
+ }
+}
+
+# Based on Moses' safesystem sub
+sub check_call {
+ print STDERR "Executing: @_\n";
+ system(@_);
+ my $exitcode = $? >> 8;
+ if($exitcode == 0) {
+ return 0;
+ } elsif ($? == -1) {
+ print STDERR "ERROR: Failed to execute: @_\n $!\n";
+ exit(1);
+
+ } elsif ($? & 127) {
+ printf STDERR "ERROR: Execution of: @_\n died with signal %d, %s coredump\n",
+ ($? & 127), ($? & 128) ? 'with' : 'without';
+ exit(1);
+
+ } else {
+ print STDERR "Failed with exit code: $exitcode\n" if $exitcode;
+ exit($exitcode);
+ }
+}
+
+sub check_bash_call {
+ my @args = ( "bash", "-auxeo", "pipefail", "-c", "@_");
+ check_call(@args);
+}
+
+sub check_bash_output {
+ my @args = ( "bash", "-auxeo", "pipefail", "-c", "@_");
+ return check_output(@args);
+}
+
+# perl module weirdness...
+return 1;