X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=tools%2Ftools.c;h=09cc3d3a17b362b324b99d5ef20fc922d885ff36;hp=b93448278648034f8835668db5476cc6abe038c5;hb=024fbb5f9682d3187b65849948c372c3879ed9bd;hpb=afcb4f4dd0d88c699d816883d62c8cff5f37ca0d

diff --git a/tools/tools.c b/tools/tools.c
index b9344827..09cc3d3a 100644
--- a/tools/tools.c
+++ b/tools/tools.c
@@ -17,7 +17,7 @@
 #include <assert.h>
 #include "tools.h"
 
-static char *tmpdir = NULL;
+static const char *tmpdir = NULL;
 bool tools_verbose = false;
 
 /* Ten minutes. */
@@ -81,6 +81,8 @@ char *run_with_timeout(const void *ctx, const char *cmd,
 	if (tools_verbose)
 		printf("Running: %s\n", cmd);
 
+	/* Always flush buffers before fork! */
+	fflush(stdout);
 	gettimeofday(&start, NULL);
 	pid = fork();
 	if (pid == -1) {
@@ -131,7 +133,7 @@ char *run_with_timeout(const void *ctx, const char *cmd,
 		*timeout_ms = 0;
 	else
 		*timeout_ms -= ms;
-
+	close(p[0]);
 	if (tools_verbose) {
 		printf("%s", ret);
 		printf("Finished: %u ms, %s %u\n", ms,
@@ -143,38 +145,38 @@ char *run_with_timeout(const void *ctx, const char *cmd,
 	return ret;
 }
 
-/* Returns output if command fails. */
-char *run_command(const void *ctx, unsigned int *time_ms, const char *fmt, ...)
+/* Tallocs *output off ctx; return false if command fails. */
+bool run_command(const void *ctx, unsigned int *time_ms, char **output,
+		 const char *fmt, ...)
 {
 	va_list ap;
-	char *cmd, *contents;
+	char *cmd;
 	bool ok;
 	unsigned int default_time = default_timeout_ms;
 
 	if (!time_ms)
 		time_ms = &default_time;
-	else if (*time_ms == 0)
-		return talloc_strdup(ctx, "\n== TIMED OUT ==\n");
+	else if (*time_ms == 0) {
+		*output = talloc_strdup(ctx, "\n== TIMED OUT ==\n");
+		return false;
+	}
 
 	va_start(ap, fmt);
 	cmd = talloc_vasprintf(ctx, fmt, ap);
 	va_end(ap);
 
-	contents = run_with_timeout(ctx, cmd, &ok, time_ms);
-	if (ok) {
-		talloc_free(contents);
-		return NULL;
-	}
-
-	if (!contents)
+	*output = run_with_timeout(ctx, cmd, &ok, time_ms);
+	if (ok)
+		return true;
+	if (!*output)
 		err(1, "Problem running child");
 	if (*time_ms == 0)
-		contents = talloc_asprintf_append(contents,
-						  "\n== TIMED OUT ==\n");
-	return contents;
+		*output = talloc_asprintf_append(*output,
+						 "\n== TIMED OUT ==\n");
+	return false;
 }
 
-static int unlink_all(char *dir)
+static int unlink_all(const char *dir)
 {
 	char cmd[strlen(dir) + sizeof("rm -rf ")];
 	sprintf(cmd, "rm -rf %s", dir);
@@ -185,7 +187,7 @@ static int unlink_all(char *dir)
 	return 0;
 }
 
-char *temp_dir(const void *ctx)
+const char *temp_dir(const void *ctx)
 {
 	/* For first call, create dir. */
 	while (!tmpdir) {
@@ -210,6 +212,12 @@ char *temp_dir(const void *ctx)
 	return tmpdir;
 }
 
+int unlink_file_destructor(char *filename)
+{
+	unlink(filename);
+	return 0;
+}
+
 char *maybe_temp_file(const void *ctx, const char *extension, bool keep,
 		      const char *srcname)
 {
@@ -218,11 +226,7 @@ char *maybe_temp_file(const void *ctx, const char *extension, bool keep,
 	struct stat st;
 	unsigned int count = 0;
 
-	if (!keep)
-		srcname = talloc_basename(ctx, srcname);
-	else
-		assert(srcname[0] == '/');
-
+	srcname = talloc_basename(ctx, srcname);
 	if (strrchr(srcname, '.'))
 		baselen = strrchr(srcname, '.') - srcname;
 	else
@@ -230,7 +234,7 @@ char *maybe_temp_file(const void *ctx, const char *extension, bool keep,
 
 	do {
 		f = talloc_asprintf(ctx, "%s/%.*s%s%s",
-				    keep ? "" : temp_dir(ctx),
+				    temp_dir(ctx),
 				    baselen, srcname,
 				    suffix, extension);
 		talloc_free(suffix);
@@ -238,7 +242,10 @@ char *maybe_temp_file(const void *ctx, const char *extension, bool keep,
 	} while (lstat(f, &st) == 0);
 
 	if (tools_verbose)
-		printf("Creating file %s\n", f);
+		printf("Creating %sfile %s\n", keep ? "" : "temporary ", f);
+
+	if (!keep)
+		talloc_set_destructor(f, unlink_file_destructor);
 
 	talloc_free(suffix);
 	return f;