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Code Issues Releases Wiki Activity

hashindex: Improve error messages

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This should make ENOSPC issues like #298 easier to identify
This commit is contained in:
Jonas Borgström 2015-05-16 22:49:28 +02:00
parent 7b61f6aff4
commit d7cd3bb8bd
2 changed files with 24 additions and 7 deletions
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6
CHANGES
View file

@ -3,6 +3,12 @@ Attic Changelog
Here you can see the full list of changes between each Attic release.
Version 0.17
------------
(bugfix release, released on X)
- Improve hashindex error messages (#298)
Version 0.16
------------

25
attic/_hashindex.c
View file

@ -57,8 +57,10 @@ typedef struct {
#define BUCKET_MARK_DELETED(index, idx) (*((uint32_t *)(BUCKET_ADDR(index, idx) + index->key_size)) = DELETED)
#define BUCKET_MARK_EMPTY(index, idx) (*((uint32_t *)(BUCKET_ADDR(index, idx) + index->key_size)) = EMPTY)
#define EPRINTF(msg, ...) fprintf(stderr, "hashindex: " msg "\n", ##__VA_ARGS__)
#define EPRINTF_PATH(path, msg, ...) fprintf(stderr, "hashindex: %s: " msg "\n", path, ##__VA_ARGS__)
#define EPRINTF_MSG(msg, ...) fprintf(stderr, "hashindex: " msg "\n", ##__VA_ARGS__)
#define EPRINTF_MSG_PATH(path, msg, ...) fprintf(stderr, "hashindex: %s: " msg "\n", path, ##__VA_ARGS__)
#define EPRINTF(msg, ...) fprintf(stderr, "hashindex: " msg "(%s)\n", ##__VA_ARGS__, strerror(errno))
#define EPRINTF_PATH(path, msg, ...) fprintf(stderr, "hashindex: %s: " msg " (%s)\n", path, ##__VA_ARGS__, strerror(errno))
static HashIndex *hashindex_read(const char *path);
static int hashindex_write(HashIndex *index, const char *path);
@ -143,7 +145,12 @@ hashindex_read(const char *path)
return NULL;
}
if(fread(&header, 1, sizeof(HashHeader), fd) != sizeof(HashHeader)) {
EPRINTF_PATH(path, "fread failed");
if(ferror(fd)) {
EPRINTF_PATH(path, "fread failed");
}
else {
EPRINTF_MSG_PATH(path, "failed to read %ld bytes", sizeof(HashHeader));
}
goto fail;
}
if(fseek(fd, 0, SEEK_END) < 0) {
@ -159,11 +166,11 @@ hashindex_read(const char *path)
goto fail;
}
if(memcmp(header.magic, MAGIC, 8)) {
EPRINTF_PATH(path, "Unknown file header");
EPRINTF_MSG_PATH(path, "Unknown file header");
goto fail;
}
if(length != sizeof(HashHeader) + (off_t)_le32toh(header.num_buckets) * (header.key_size + header.value_size)) {
EPRINTF_PATH(path, "Incorrect file length");
EPRINTF_MSG_PATH(path, "Incorrect file length");
goto fail;
}
if(!(index = malloc(sizeof(HashIndex)))) {
@ -177,7 +184,12 @@ hashindex_read(const char *path)
goto fail;
}
if(fread(index->data, 1, length, fd) != length) {
EPRINTF_PATH(path, "fread failed");
if(ferror(fd)) {
EPRINTF_PATH(path, "fread failed");
}
else {
EPRINTF_MSG_PATH(path, "failed to read %ld bytes", length);
}
free(index->data);
free(index);
index = NULL;
@ -249,7 +261,6 @@ hashindex_write(HashIndex *index, const char *path)
if((fd = fopen(path, "w")) == NULL) {
EPRINTF_PATH(path, "open failed");
fprintf(stderr, "Failed to open %s for writing\n", path);
return 0;
}
*((uint32_t *)(index->data + 8)) = _htole32(index->num_entries);