X-Git-Url: https://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=tools%2Ftools.c;h=b93448278648034f8835668db5476cc6abe038c5;hp=b7beda72b9c5b6cf0a5ec8beffb34d535887b6a3;hb=afcb4f4dd0d88c699d816883d62c8cff5f37ca0d;hpb=501e192029768948a81aeef6515f5d0dd6519f37

diff --git a/tools/tools.c b/tools/tools.c
index b7beda72..b9344827 100644
--- a/tools/tools.c
+++ b/tools/tools.c
@@ -14,10 +14,10 @@
 #include <errno.h>
 #include <err.h>
 #include <unistd.h>
+#include <assert.h>
 #include "tools.h"
 
 static char *tmpdir = NULL;
-static unsigned int count;
 bool tools_verbose = false;
 
 /* Ten minutes. */
@@ -28,7 +28,7 @@ char *talloc_basename(const void *ctx, const char *dir)
 	char *p = strrchr(dir, '/');
 
 	if (!p)
-		return (char *)dir;
+		return talloc_strdup(ctx, dir);
 	return talloc_strdup(ctx, p+1);
 }
 
@@ -204,34 +204,43 @@ char *temp_dir(const void *ctx)
 			err(1, "mkdir %s failed", tmpdir);
 		}
 		talloc_set_destructor(tmpdir, unlink_all);
+		if (tools_verbose)
+			printf("Created temporary directory %s\n", tmpdir);
 	}
-	if (tools_verbose)
-		printf("Created temporary directory %s\n", tmpdir);
 	return tmpdir;
 }
 
-char *temp_file(const void *ctx, const char *extension)
-{
-	char *f = talloc_asprintf(ctx, "%s/%u%s",
-				  temp_dir(ctx), count++, extension);
-	if (tools_verbose)
-		printf("Created temporary file %s\n", f);
-	return f;
-}
-
 char *maybe_temp_file(const void *ctx, const char *extension, bool keep,
 		      const char *srcname)
 {
-	size_t baselen;
-	char *f;
+	unsigned baselen;
+	char *f, *suffix = talloc_strdup(ctx, "");
+	struct stat st;
+	unsigned int count = 0;
 
 	if (!keep)
-		return temp_file(ctx, extension);
+		srcname = talloc_basename(ctx, srcname);
+	else
+		assert(srcname[0] == '/');
+
+	if (strrchr(srcname, '.'))
+		baselen = strrchr(srcname, '.') - srcname;
+	else
+		baselen = strlen(srcname);
+
+	do {
+		f = talloc_asprintf(ctx, "%s/%.*s%s%s",
+				    keep ? "" : temp_dir(ctx),
+				    baselen, srcname,
+				    suffix, extension);
+		talloc_free(suffix);
+		suffix = talloc_asprintf(ctx, "-%u", ++count);
+	} while (lstat(f, &st) == 0);
 
-	baselen = strrchr(srcname, '.') - srcname;
-	f = talloc_asprintf(ctx, "%.*s%s", baselen, srcname, extension);
 	if (tools_verbose)
 		printf("Creating file %s\n", f);
+
+	talloc_free(suffix);
 	return f;
 }