git-log: Add usage string

diff --git a/read-cache.c b/read-cache.c
index ef6fd79e20bf66f5594cf3996d04827f4062bb44..693273620370e0500bc9ea2adba98a88cafc39cd 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -35,8 +35,11 @@ int ce_match_stat(struct cache_entry *ce, struct stat *st)
        switch (ntohl(ce->ce_mode) & S_IFMT) {
        case S_IFREG:
                changed |= !S_ISREG(st->st_mode) ? TYPE_CHANGED : 0;
-               /* We consider only the owner x bit to be relevant for "mode changes" */
-               if (0100 & (ntohl(ce->ce_mode) ^ st->st_mode))
+               /* We consider only the owner x bit to be relevant for
+                * "mode changes"
+                */
+               if (trust_executable_bit &&
+                   (0100 & (ntohl(ce->ce_mode) ^ st->st_mode)))
                        changed |= MODE_CHANGED;
                break;
        case S_IFLNK:
@@ -232,7 +235,7 @@ int remove_cache_entry_at(int pos)
        return 1;
 }
 
-int remove_file_from_cache(char *path)
+int remove_file_from_cache(const char *path)
 {
        int pos = cache_name_pos(path, strlen(path));
        if (pos < 0)
@@ -392,7 +395,7 @@ int add_cache_entry(struct cache_entry *ce, int option)
        int skip_df_check = option & ADD_CACHE_SKIP_DFCHECK;
        pos = cache_name_pos(ce->name, ntohs(ce->ce_flags));
 
-       /* existing match? Just replace it */
+       /* existing match? Just replace it. */
        if (pos >= 0) {
                active_cache_changed = 1;
                active_cache[pos] = ce;
@@ -415,7 +418,8 @@ int add_cache_entry(struct cache_entry *ce, int option)
        if (!ok_to_add)
                return -1;
 
-       if (!skip_df_check && check_file_directory_conflict(ce, pos, ok_to_replace)) {
+       if (!skip_df_check &&
+           check_file_directory_conflict(ce, pos, ok_to_replace)) {
                if (!ok_to_replace)
                        return -1;
                pos = cache_name_pos(ce->name, ntohs(ce->ce_flags));
@@ -464,11 +468,15 @@ int read_cache(void)
 
        errno = EBUSY;
        if (active_cache)
-               return error("more than one cachefile");
+               return active_nr;
+
        errno = ENOENT;
        fd = open(get_index_file(), O_RDONLY);
-       if (fd < 0)
-               return (errno == ENOENT) ? 0 : error("open failed");
+       if (fd < 0) {
+               if (errno == ENOENT)
+                       return 0;
+               die("index file open failed (%s)", strerror(errno));
+       }
 
        size = 0; // avoid gcc warning
        map = MAP_FAILED;
@@ -480,7 +488,7 @@ int read_cache(void)
        }
        close(fd);
        if (map == MAP_FAILED)
-               return error("mmap failed");
+               die("index file mmap failed (%s)", strerror(errno));
 
        hdr = map;
        if (verify_hdr(hdr, size) < 0)
@@ -501,7 +509,7 @@ int read_cache(void)
 unmap:
        munmap(map, size);
        errno = EINVAL;
-       return error("verify header failed");
+       die("index file corrupt");
 }
 
 #define WRITE_BUFFER_SIZE 8192