X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=exec_cmd.c;h=3996bce33fe11b8f0bae120fabd40a74c66de342;hb=e27e609bbf81271318d99f2643f378f3fde6c6c6;hp=590e738969ecfdd7ff2f23da36cdac917215313d;hpb=4c61b7d15a6215fa4dffa33c37c3ef9df80d3f67;p=git.git

diff --git a/exec_cmd.c b/exec_cmd.c
index 590e73896..3996bce33 100644
--- a/exec_cmd.c
+++ b/exec_cmd.c
@@ -1,10 +1,11 @@
 #include "cache.h"
 #include "exec_cmd.h"
+#include "quote.h"
 #define MAX_ARGS	32
 
 extern char **environ;
 static const char *builtin_exec_path = GIT_EXEC_PATH;
-static const char *current_exec_path = NULL;
+static const char *current_exec_path;
 
 void git_set_exec_path(const char *exec_path)
 {
@@ -20,8 +21,8 @@ const char *git_exec_path(void)
 	if (current_exec_path)
 		return current_exec_path;
 
-	env = getenv("GIT_EXEC_PATH");
-	if (env) {
+	env = getenv(EXEC_PATH_ENVIRONMENT);
+	if (env && *env) {
 		return env;
 	}
 
@@ -32,22 +33,25 @@ const char *git_exec_path(void)
 int execv_git_cmd(const char **argv)
 {
 	char git_command[PATH_MAX + 1];
-	int len, err, i;
+	int i;
 	const char *paths[] = { current_exec_path,
-				getenv("GIT_EXEC_PATH"),
+				getenv(EXEC_PATH_ENVIRONMENT),
 				builtin_exec_path };
 
 	for (i = 0; i < ARRAY_SIZE(paths); ++i) {
+		size_t len;
+		int rc;
 		const char *exec_dir = paths[i];
 		const char *tmp;
 
-		if (!exec_dir) continue;
+		if (!exec_dir || !*exec_dir) continue;
 
 		if (*exec_dir != '/') {
 			if (!getcwd(git_command, sizeof(git_command))) {
 				fprintf(stderr, "git: cannot determine "
-					"current directory\n");
-				exit(1);
+					"current directory: %s\n",
+					strerror(errno));
+				break;
 			}
 			len = strlen(git_command);
 
@@ -57,17 +61,28 @@ int execv_git_cmd(const char **argv)
 				while (*exec_dir == '/')
 					exec_dir++;
 			}
-			snprintf(git_command + len, sizeof(git_command) - len,
-				 "/%s", exec_dir);
+
+			rc = snprintf(git_command + len,
+				      sizeof(git_command) - len, "/%s",
+				      exec_dir);
+			if (rc < 0 || rc >= sizeof(git_command) - len) {
+				fprintf(stderr, "git: command name given "
+					"is too long.\n");
+				break;
+			}
 		} else {
+			if (strlen(exec_dir) + 1 > sizeof(git_command)) {
+				fprintf(stderr, "git: command name given "
+					"is too long.\n");
+				break;
+			}
 			strcpy(git_command, exec_dir);
 		}
 
 		len = strlen(git_command);
-		len += snprintf(git_command + len, sizeof(git_command) - len,
-				"/git-%s", argv[0]);
-
-		if (sizeof(git_command) <= len) {
+		rc = snprintf(git_command + len, sizeof(git_command) - len,
+			      "/git-%s", argv[0]);
+		if (rc < 0 || rc >= sizeof(git_command) - len) {
 			fprintf(stderr,
 				"git: command name given is too long.\n");
 			break;
@@ -82,10 +97,12 @@ int execv_git_cmd(const char **argv)
 		tmp = argv[0];
 		argv[0] = git_command;
 
+		trace_argv_printf(argv, -1, "trace: exec:");
+
 		/* execve() can only ever return if it fails */
 		execve(git_command, (char **)argv, environ);
 
-		err = errno;
+		trace_printf("trace: exec failed: %s\n", strerror(errno));
 
 		argv[0] = tmp;
 	}