t7001: add test case for --dry-run

diff --git a/wrapper.c b/wrapper.c
index 0542fc75821fdbdd7bfecebec5f7df01e49dcb0c..61aba0b5c1bece4aad04bee649accae990a8ce18 100644 (file)
--- a/wrapper.c
+++ b/wrapper.c
@@ -2,6 +2,7 @@
  * Various trivial helper wrappers around standard functions
  */
 #include "cache.h"
+#include "config.h"
 
 static void do_nothing(size_t size)
 {
@@ -418,6 +419,32 @@ FILE *fopen_for_writing(const char *path)
        return ret;
 }
 
+static void warn_on_inaccessible(const char *path)
+{
+       warning_errno(_("unable to access '%s'"), path);
+}
+
+int warn_on_fopen_errors(const char *path)
+{
+       if (errno != ENOENT && errno != ENOTDIR) {
+               warn_on_inaccessible(path);
+               return -1;
+       }
+
+       return 0;
+}
+
+FILE *fopen_or_warn(const char *path, const char *mode)
+{
+       FILE *fp = fopen(path, mode);
+
+       if (fp)
+               return fp;
+
+       warn_on_fopen_errors(path);
+       return NULL;
+}
+
 int xmkstemp(char *template)
 {
        int fd;
@@ -576,15 +603,10 @@ int remove_or_warn(unsigned int mode, const char *file)
        return S_ISGITLINK(mode) ? rmdir_or_warn(file) : unlink_or_warn(file);
 }
 
-void warn_on_inaccessible(const char *path)
-{
-       warning_errno(_("unable to access '%s'"), path);
-}
-
 static int access_error_is_ok(int err, unsigned flag)
 {
-       return err == ENOENT || err == ENOTDIR ||
-               ((flag & ACCESS_EACCES_OK) && err == EACCES);
+       return (is_missing_file_error(err) ||
+               ((flag & ACCESS_EACCES_OK) && err == EACCES));
 }
 
 int access_or_warn(const char *path, int mode, unsigned flag)
@@ -630,7 +652,7 @@ int xsnprintf(char *dst, size_t max, const char *fmt, ...)
 void write_file_buf(const char *path, const char *buf, size_t len)
 {
        int fd = xopen(path, O_WRONLY | O_CREAT | O_TRUNC, 0666);
-       if (write_in_full(fd, buf, len) != len)
+       if (write_in_full(fd, buf, len) < 0)
                die_errno(_("could not write to %s"), path);
        if (close(fd))
                die_errno(_("could not close %s"), path);
@@ -655,3 +677,16 @@ void sleep_millisec(int millisec)
 {
        poll(NULL, 0, millisec);
 }
+
+int xgethostname(char *buf, size_t len)
+{
+       /*
+        * If the full hostname doesn't fit in buf, POSIX does not
+        * specify whether the buffer will be null-terminated, so to
+        * be safe, do it ourselves.
+        */
+       int ret = gethostname(buf, len);
+       if (!ret)
+               buf[len - 1] = 0;
+       return ret;
+}