name-rev: change a "long" variable to timestamp_t
[gitweb.git] / builtin / merge-file.c
index ab4330a3d0b0099c37acf12dbb3d02bd06b74287..47dde7c39c922c77bf388e87db27618d09f5bb74 100644 (file)
@@ -5,7 +5,7 @@
 #include "parse-options.h"
 
 static const char *const merge_file_usage[] = {
-       N_("git merge-file [options] [-L name1 [-L orig [-L name2]]] file1 orig_file file2"),
+       N_("git merge-file [<options>] [-L <name1> [-L <orig> [-L <name2>]]] <file1> <orig-file> <file2>"),
        NULL
 };
 
@@ -28,7 +28,6 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
        xmparam_t xmp = {{0}};
        int ret = 0, i = 0, to_stdout = 0;
        int quiet = 0;
-       int prefixlen = 0;
        struct option options[] = {
                OPT_BOOL('p', "stdout", &to_stdout, N_("send results to standard output")),
                OPT_SET_INT(0, "diff3", &xmp.style, N_("use a diff3 based merge"), XDL_MERGE_DIFF3),
@@ -42,7 +41,7 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
                            N_("for conflicts, use this marker size")),
                OPT__QUIET(&quiet, N_("do not warn about conflicts")),
                OPT_CALLBACK('L', NULL, names, N_("name"),
-                            N_("set labels for file1/orig_file/file2"), &label_cb),
+                            N_("set labels for file1/orig-file/file2"), &label_cb),
                OPT_END(),
        };
 
@@ -62,20 +61,24 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
                usage_with_options(merge_file_usage, options);
        if (quiet) {
                if (!freopen("/dev/null", "w", stderr))
-                       return error("failed to redirect stderr to /dev/null: "
-                                    "%s", strerror(errno));
+                       return error_errno("failed to redirect stderr to /dev/null");
        }
 
-       if (prefix)
-               prefixlen = strlen(prefix);
-
        for (i = 0; i < 3; i++) {
-               const char *fname = prefix_filename(prefix, prefixlen, argv[i]);
+               char *fname;
+               int ret;
+
                if (!names[i])
                        names[i] = argv[i];
-               if (read_mmfile(mmfs + i, fname))
+
+               fname = prefix_filename(prefix, argv[i]);
+               ret = read_mmfile(mmfs + i, fname);
+               free(fname);
+               if (ret)
                        return -1;
-               if (buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
+
+               if (mmfs[i].size > MAX_XDIFF_SIZE ||
+                   buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
                        return error("Cannot merge binary files: %s",
                                        argv[i]);
        }
@@ -90,16 +93,19 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
 
        if (ret >= 0) {
                const char *filename = argv[0];
-               FILE *f = to_stdout ? stdout : fopen(filename, "wb");
+               char *fpath = prefix_filename(prefix, argv[0]);
+               FILE *f = to_stdout ? stdout : fopen(fpath, "wb");
 
                if (!f)
-                       ret = error("Could not open %s for writing", filename);
+                       ret = error_errno("Could not open %s for writing",
+                                         filename);
                else if (result.size &&
                         fwrite(result.ptr, result.size, 1, f) != 1)
-                       ret = error("Could not write to %s", filename);
+                       ret = error_errno("Could not write to %s", filename);
                else if (fclose(f))
-                       ret = error("Could not close %s", filename);
+                       ret = error_errno("Could not close %s", filename);
                free(result.ptr);
+               free(fpath);
        }
 
        if (ret > 127)