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system.c
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133 lines (107 loc) · 2.48 KB
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#include "../git-compat-util.h"
#include "system.h"
#include "basics.h"
#include "reftable-error.h"
#include "../lockfile.h"
#include "../tempfile.h"
uint32_t reftable_rand(void)
{
return git_rand(CSPRNG_BYTES_INSECURE);
}
int tmpfile_from_pattern(struct reftable_tmpfile *out, const char *pattern)
{
struct tempfile *tempfile;
tempfile = mks_tempfile(pattern);
if (!tempfile)
return REFTABLE_IO_ERROR;
out->path = tempfile->filename.buf;
out->fd = tempfile->fd;
out->priv = tempfile;
return 0;
}
int tmpfile_close(struct reftable_tmpfile *t)
{
struct tempfile *tempfile = t->priv;
int ret = close_tempfile_gently(tempfile);
t->fd = -1;
if (ret < 0)
return REFTABLE_IO_ERROR;
return 0;
}
int tmpfile_delete(struct reftable_tmpfile *t)
{
struct tempfile *tempfile = t->priv;
int ret = delete_tempfile(&tempfile);
*t = REFTABLE_TMPFILE_INIT;
if (ret < 0)
return REFTABLE_IO_ERROR;
return 0;
}
int tmpfile_rename(struct reftable_tmpfile *t, const char *path)
{
struct tempfile *tempfile = t->priv;
int ret = rename_tempfile(&tempfile, path);
*t = REFTABLE_TMPFILE_INIT;
if (ret < 0)
return REFTABLE_IO_ERROR;
return 0;
}
int flock_acquire(struct reftable_flock *l, const char *target_path,
long timeout_ms)
{
struct lock_file *lockfile;
int err;
lockfile = reftable_malloc(sizeof(*lockfile));
if (!lockfile)
return REFTABLE_OUT_OF_MEMORY_ERROR;
err = hold_lock_file_for_update_timeout(lockfile, target_path, LOCK_NO_DEREF,
timeout_ms);
if (err < 0) {
reftable_free(lockfile);
if (errno == EEXIST)
return REFTABLE_LOCK_ERROR;
return REFTABLE_IO_ERROR;
}
l->fd = get_lock_file_fd(lockfile);
l->path = get_lock_file_path(lockfile);
l->priv = lockfile;
return 0;
}
int flock_close(struct reftable_flock *l)
{
struct lock_file *lockfile = l->priv;
int ret;
if (!lockfile)
return REFTABLE_API_ERROR;
ret = close_lock_file_gently(lockfile);
l->fd = -1;
if (ret < 0)
return REFTABLE_IO_ERROR;
return 0;
}
int flock_release(struct reftable_flock *l)
{
struct lock_file *lockfile = l->priv;
int ret;
if (!lockfile)
return 0;
ret = rollback_lock_file(lockfile);
reftable_free(lockfile);
*l = REFTABLE_FLOCK_INIT;
if (ret < 0)
return REFTABLE_IO_ERROR;
return 0;
}
int flock_commit(struct reftable_flock *l)
{
struct lock_file *lockfile = l->priv;
int ret;
if (!lockfile)
return REFTABLE_API_ERROR;
ret = commit_lock_file(lockfile);
reftable_free(lockfile);
*l = REFTABLE_FLOCK_INIT;
if (ret < 0)
return REFTABLE_IO_ERROR;
return 0;
}