builtin-remote: make rm operation safer in mirrored repository

diff --git a/xdiff-interface.c b/xdiff-interface.c
index bba236428adb0b34421b9f1b5a3a1728911ee406..3bf83f81e38d4a4cc114f3c577241cf7b9eddc7e 100644 (file)
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -152,8 +152,8 @@ int read_mmfile(mmfile_t *ptr, const char *filename)
        if ((f = fopen(filename, "rb")) == NULL)
                return error("Could not open %s", filename);
        sz = xsize_t(st.st_size);
-       ptr->ptr = xmalloc(sz);
-       if (fread(ptr->ptr, sz, 1, f) != 1)
+       ptr->ptr = xmalloc(sz ? sz : 1);
+       if (sz && fread(ptr->ptr, sz, 1, f) != 1)
                return error("Could not read %s", filename);
        fclose(f);
        ptr->size = sz;
@@ -179,11 +179,21 @@ struct ff_regs {
 static long ff_regexp(const char *line, long len,
                char *buffer, long buffer_size, void *priv)
 {
-       char *line_buffer = xstrndup(line, len); /* make NUL terminated */
+       char *line_buffer;
        struct ff_regs *regs = priv;
        regmatch_t pmatch[2];
        int result = 0, i;
 
+       /* Exclude terminating newline (and cr) from matching */
+       if (len > 0 && line[len-1] == '\n') {
+               if (len > 1 && line[len-2] == '\r')
+                       len -= 2;
+               else
+                       len--;
+       }
+
+       line_buffer = xstrndup(line, len); /* make NUL terminated */
+
        for (i = 0; i < regs->nr; i++) {
                struct ff_reg *reg = regs->array + i;
                if (reg->negate ^ !!regexec(&reg->re,
@@ -206,7 +216,7 @@ static long ff_regexp(const char *line, long len,
        return result;
 }
 
-void xdiff_set_find_func(xdemitconf_t *xecfg, const char *value)
+void xdiff_set_find_func(xdemitconf_t *xecfg, const char *value, int cflags)
 {
        int i;
        struct ff_regs *regs;
@@ -231,7 +241,7 @@ void xdiff_set_find_func(xdemitconf_t *xecfg, const char *value)
                        expression = buffer = xstrndup(value, ep - value);
                else
                        expression = value;
-               if (regcomp(&reg->re, expression, 0))
+               if (regcomp(&reg->re, expression, cflags))
                        die("Invalid regexp to look for hunk header: %s", expression);
                free(buffer);
                value = ep + 1;