X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=git.c;h=c26cac6555e940e1ae5573a99350388f09118b87;hb=86c9523305f75818d4dce485a18f6b4ccae78233;hp=bdd3f8d01c0be5edeccf8b99c98a1cff5d70dbc2;hpb=f9039f30d56e3815eaab870d8b19c7b94aded8aa;p=git.git

diff --git a/git.c b/git.c
index bdd3f8d0..c26cac65 100644
--- a/git.c
+++ b/git.c
@@ -8,6 +8,7 @@
 #include <errno.h>
 #include <limits.h>
 #include <stdarg.h>
+#include "git-compat-util.h"
 
 #ifndef PATH_MAX
 # define PATH_MAX 4096
@@ -152,10 +153,10 @@ static void list_commands(const char *exec_path, const char *pattern)
 }
 
 #ifdef __GNUC__
-static void usage(const char *exec_path, const char *fmt, ...)
+static void cmd_usage(const char *exec_path, const char *fmt, ...)
 	__attribute__((__format__(__printf__, 2, 3), __noreturn__));
 #endif
-static void usage(const char *exec_path, const char *fmt, ...)
+static void cmd_usage(const char *exec_path, const char *fmt, ...)
 {
 	if (fmt) {
 		va_list ap;
@@ -188,7 +189,6 @@ static void prepend_to_path(const char *dir, int len)
 	path_len = len + strlen(old_path) + 1;
 
 	path = malloc(path_len + 1);
-	path[path_len + 1] = '\0';
 
 	memcpy(path, dir, len);
 	path[len] = ':';
@@ -251,12 +251,12 @@ int main(int argc, char **argv, char **envp)
 		else if (!strcmp(arg, "help"))
 			show_help = 1;
 		else if (!show_help)
-			usage(NULL, NULL);
+			cmd_usage(NULL, NULL);
 	}
 
 	if (i >= argc || show_help) {
 		if (i >= argc)
-			usage(exec_path, NULL);
+			cmd_usage(exec_path, NULL);
 
 		show_man_page(argv[i]);
 	}
@@ -273,7 +273,7 @@ int main(int argc, char **argv, char **envp)
 		while (!strncmp(exec_path, "./", 2)) {
 			exec_path += 2;
 			while (*exec_path == '/')
-				*exec_path++;
+				exec_path++;
 		}
 		snprintf(git_command + len, sizeof(git_command) - len,
 			 "/%s", exec_path);
@@ -283,16 +283,21 @@ int main(int argc, char **argv, char **envp)
 	len = strlen(git_command);
 	prepend_to_path(git_command, len);
 
-	strncat(&git_command[len], "/git-", sizeof(git_command) - len);
-	len += 5;
-	strncat(&git_command[len], argv[i], sizeof(git_command) - len);
-
-	if (access(git_command, X_OK))
-		usage(exec_path, "'%s' is not a git-command", argv[i]);
+	len += snprintf(git_command + len, sizeof(git_command) - len,
+			"/git-%s", argv[i]);
+	if (sizeof(git_command) <= len) {
+		fprintf(stderr, "git: command name given is too long.\n");
+		exit(1);
+	}
 
 	/* execve() can only ever return if it fails */
 	execve(git_command, &argv[i], envp);
-	printf("Failed to run command '%s': %s\n", git_command, strerror(errno));
+
+	if (errno == ENOENT)
+		cmd_usage(exec_path, "'%s' is not a git-command", argv[i]);
+
+	fprintf(stderr, "Failed to run command '%s': %s\n",
+		git_command, strerror(errno));
 
 	return 1;
 }