| /* |
| * mkquota.c --- create quota files for a filesystem |
| * |
| * Aditya Kali <adityakali@google.com> |
| */ |
| #include "config.h" |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <fcntl.h> |
| |
| #include "ext2fs/ext2_fs.h" |
| #include "ext2fs/ext2fs.h" |
| #include "e2p/e2p.h" |
| |
| #include "quotaio.h" |
| #include "quotaio_v2.h" |
| #include "quotaio_tree.h" |
| #include "common.h" |
| #include "dict.h" |
| |
| /* Needed for architectures where sizeof(int) != sizeof(void *) */ |
| #define UINT_TO_VOIDPTR(val) ((void *)(intptr_t)(val)) |
| #define VOIDPTR_TO_UINT(ptr) ((unsigned int)(intptr_t)(ptr)) |
| |
| #if DEBUG_QUOTA |
| static void print_inode(struct ext2_inode *inode) |
| { |
| if (!inode) |
| return; |
| |
| fprintf(stderr, " i_mode = %d\n", inode->i_mode); |
| fprintf(stderr, " i_uid = %d\n", inode->i_uid); |
| fprintf(stderr, " i_size = %d\n", inode->i_size); |
| fprintf(stderr, " i_atime = %d\n", inode->i_atime); |
| fprintf(stderr, " i_ctime = %d\n", inode->i_ctime); |
| fprintf(stderr, " i_mtime = %d\n", inode->i_mtime); |
| fprintf(stderr, " i_dtime = %d\n", inode->i_dtime); |
| fprintf(stderr, " i_gid = %d\n", inode->i_gid); |
| fprintf(stderr, " i_links_count = %d\n", inode->i_links_count); |
| fprintf(stderr, " i_blocks = %d\n", inode->i_blocks); |
| fprintf(stderr, " i_flags = %d\n", inode->i_flags); |
| |
| return; |
| } |
| |
| static void print_dquot(const char *desc, struct dquot *dq) |
| { |
| if (desc) |
| fprintf(stderr, "%s: ", desc); |
| fprintf(stderr, "%u %lld:%lld:%lld %lld:%lld:%lld\n", |
| dq->dq_id, (long long) dq->dq_dqb.dqb_curspace, |
| (long long) dq->dq_dqb.dqb_bsoftlimit, |
| (long long) dq->dq_dqb.dqb_bhardlimit, |
| (long long) dq->dq_dqb.dqb_curinodes, |
| (long long) dq->dq_dqb.dqb_isoftlimit, |
| (long long) dq->dq_dqb.dqb_ihardlimit); |
| } |
| #else |
| static void print_dquot(const char *desc EXT2FS_ATTR((unused)), |
| struct dquot *dq EXT2FS_ATTR((unused))) |
| { |
| } |
| #endif |
| |
| /* |
| * Returns 0 if not able to find the quota file, otherwise returns its |
| * inode number. |
| */ |
| int quota_file_exists(ext2_filsys fs, enum quota_type qtype) |
| { |
| char qf_name[256]; |
| errcode_t ret; |
| ext2_ino_t ino; |
| |
| if (qtype >= MAXQUOTAS) |
| return -EINVAL; |
| |
| quota_get_qf_name(qtype, QFMT_VFS_V1, qf_name); |
| |
| ret = ext2fs_lookup(fs, EXT2_ROOT_INO, qf_name, strlen(qf_name), 0, |
| &ino); |
| if (ret) |
| return 0; |
| |
| return ino; |
| } |
| |
| /* |
| * Set the value for reserved quota inode number field in superblock. |
| */ |
| void quota_set_sb_inum(ext2_filsys fs, ext2_ino_t ino, enum quota_type qtype) |
| { |
| ext2_ino_t *inump; |
| |
| inump = quota_sb_inump(fs->super, qtype); |
| |
| log_debug("setting quota ino in superblock: ino=%u, type=%d", ino, |
| qtype); |
| *inump = ino; |
| ext2fs_mark_super_dirty(fs); |
| } |
| |
| errcode_t quota_remove_inode(ext2_filsys fs, enum quota_type qtype) |
| { |
| ext2_ino_t qf_ino; |
| errcode_t retval; |
| |
| retval = ext2fs_read_bitmaps(fs); |
| if (retval) { |
| log_debug("Couldn't read bitmaps: %s", error_message(retval)); |
| return retval; |
| } |
| |
| qf_ino = *quota_sb_inump(fs->super, qtype); |
| if (qf_ino == 0) |
| return 0; |
| retval = quota_inode_truncate(fs, qf_ino); |
| if (retval) |
| return retval; |
| if (qf_ino >= EXT2_FIRST_INODE(fs->super)) { |
| struct ext2_inode inode; |
| |
| retval = ext2fs_read_inode(fs, qf_ino, &inode); |
| if (!retval) { |
| memset(&inode, 0, sizeof(struct ext2_inode)); |
| ext2fs_write_inode(fs, qf_ino, &inode); |
| } |
| ext2fs_inode_alloc_stats2(fs, qf_ino, -1, 0); |
| ext2fs_mark_ib_dirty(fs); |
| |
| } |
| quota_set_sb_inum(fs, 0, qtype); |
| |
| ext2fs_mark_super_dirty(fs); |
| fs->flags &= ~EXT2_FLAG_SUPER_ONLY; |
| retval = ext2fs_write_bitmaps(fs); |
| if (retval) { |
| log_debug("Couldn't write bitmaps: %s", error_message(retval)); |
| return retval; |
| } |
| return 0; |
| } |
| |
| static void write_dquots(dict_t *dict, struct quota_handle *qh) |
| { |
| dnode_t *n; |
| struct dquot *dq; |
| |
| for (n = dict_first(dict); n; n = dict_next(dict, n)) { |
| dq = dnode_get(n); |
| if (dq) { |
| print_dquot("write", dq); |
| dq->dq_h = qh; |
| update_grace_times(dq); |
| qh->qh_ops->commit_dquot(dq); |
| } |
| } |
| } |
| |
| errcode_t quota_write_inode(quota_ctx_t qctx, unsigned int qtype_bits) |
| { |
| int retval = 0; |
| enum quota_type qtype; |
| dict_t *dict; |
| ext2_filsys fs; |
| struct quota_handle *h = NULL; |
| int fmt = QFMT_VFS_V1; |
| |
| if (!qctx) |
| return 0; |
| |
| fs = qctx->fs; |
| retval = ext2fs_get_mem(sizeof(struct quota_handle), &h); |
| if (retval) { |
| log_debug("Unable to allocate quota handle: %s", |
| error_message(retval)); |
| goto out; |
| } |
| |
| retval = ext2fs_read_bitmaps(fs); |
| if (retval) { |
| log_debug("Couldn't read bitmaps: %s", error_message(retval)); |
| goto out; |
| } |
| |
| for (qtype = 0; qtype < MAXQUOTAS; qtype++) { |
| if (((1 << qtype) & qtype_bits) == 0) |
| continue; |
| |
| dict = qctx->quota_dict[qtype]; |
| if (!dict) |
| continue; |
| |
| retval = quota_file_create(h, fs, qtype, fmt); |
| if (retval) { |
| log_debug("Cannot initialize io on quotafile: %s", |
| error_message(retval)); |
| goto out; |
| } |
| |
| write_dquots(dict, h); |
| retval = quota_file_close(qctx, h); |
| if (retval) { |
| log_debug("Cannot finish IO on new quotafile: %s", |
| strerror(errno)); |
| if (h->qh_qf.e2_file) |
| ext2fs_file_close(h->qh_qf.e2_file); |
| (void) quota_inode_truncate(fs, h->qh_qf.ino); |
| goto out; |
| } |
| |
| /* Set quota inode numbers in superblock. */ |
| quota_set_sb_inum(fs, h->qh_qf.ino, qtype); |
| ext2fs_mark_super_dirty(fs); |
| ext2fs_mark_bb_dirty(fs); |
| fs->flags &= ~EXT2_FLAG_SUPER_ONLY; |
| } |
| |
| retval = ext2fs_write_bitmaps(fs); |
| if (retval) { |
| log_debug("Couldn't write bitmaps: %s", error_message(retval)); |
| goto out; |
| } |
| out: |
| if (h) |
| ext2fs_free_mem(&h); |
| return retval; |
| } |
| |
| /******************************************************************/ |
| /* Helper functions for computing quota in memory. */ |
| /******************************************************************/ |
| |
| static int dict_uint_cmp(const void *a, const void *b) |
| { |
| unsigned int c, d; |
| |
| c = VOIDPTR_TO_UINT(a); |
| d = VOIDPTR_TO_UINT(b); |
| |
| if (c == d) |
| return 0; |
| else if (c > d) |
| return 1; |
| else |
| return -1; |
| } |
| |
| static inline int project_quota_valid(quota_ctx_t qctx) |
| { |
| return (EXT2_INODE_SIZE(qctx->fs->super) > EXT2_GOOD_OLD_INODE_SIZE); |
| } |
| |
| static inline qid_t get_qid(struct ext2_inode_large *inode, enum quota_type qtype) |
| { |
| unsigned int inode_size; |
| |
| switch (qtype) { |
| case USRQUOTA: |
| return inode_uid(*inode); |
| case GRPQUOTA: |
| return inode_gid(*inode); |
| case PRJQUOTA: |
| inode_size = EXT2_GOOD_OLD_INODE_SIZE + |
| inode->i_extra_isize; |
| if (inode_includes(inode_size, i_projid)) |
| return inode_projid(*inode); |
| return 0; |
| default: |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| static void quota_dnode_free(dnode_t *node, |
| void *context EXT2FS_ATTR((unused))) |
| { |
| void *ptr = node ? dnode_get(node) : 0; |
| |
| ext2fs_free_mem(&ptr); |
| free(node); |
| } |
| |
| /* |
| * Set up the quota tracking data structures. |
| */ |
| errcode_t quota_init_context(quota_ctx_t *qctx, ext2_filsys fs, |
| unsigned int qtype_bits) |
| { |
| errcode_t err; |
| dict_t *dict; |
| quota_ctx_t ctx; |
| enum quota_type qtype; |
| |
| err = ext2fs_get_mem(sizeof(struct quota_ctx), &ctx); |
| if (err) { |
| log_debug("Failed to allocate quota context"); |
| return err; |
| } |
| |
| memset(ctx, 0, sizeof(struct quota_ctx)); |
| for (qtype = 0; qtype < MAXQUOTAS; qtype++) { |
| ctx->quota_file[qtype] = NULL; |
| if (qtype_bits) { |
| if (((1 << qtype) & qtype_bits) == 0) |
| continue; |
| } else { |
| if (*quota_sb_inump(fs->super, qtype) == 0) |
| continue; |
| } |
| err = ext2fs_get_mem(sizeof(dict_t), &dict); |
| if (err) { |
| log_debug("Failed to allocate dictionary"); |
| quota_release_context(&ctx); |
| return err; |
| } |
| ctx->quota_dict[qtype] = dict; |
| dict_init(dict, DICTCOUNT_T_MAX, dict_uint_cmp); |
| dict_set_allocator(dict, NULL, quota_dnode_free, NULL); |
| } |
| |
| ctx->fs = fs; |
| *qctx = ctx; |
| return 0; |
| } |
| |
| void quota_release_context(quota_ctx_t *qctx) |
| { |
| errcode_t err; |
| dict_t *dict; |
| enum quota_type qtype; |
| quota_ctx_t ctx; |
| |
| if (!qctx) |
| return; |
| |
| ctx = *qctx; |
| for (qtype = 0; qtype < MAXQUOTAS; qtype++) { |
| dict = ctx->quota_dict[qtype]; |
| ctx->quota_dict[qtype] = 0; |
| if (dict) { |
| dict_free_nodes(dict); |
| free(dict); |
| } |
| if (ctx->quota_file[qtype]) { |
| err = quota_file_close(ctx, ctx->quota_file[qtype]); |
| if (err) { |
| log_err("Cannot close quotafile: %s", |
| strerror(errno)); |
| ext2fs_free_mem(&ctx->quota_file[qtype]); |
| } |
| } |
| } |
| *qctx = NULL; |
| free(ctx); |
| } |
| |
| static struct dquot *get_dq(dict_t *dict, __u32 key) |
| { |
| struct dquot *dq; |
| dnode_t *n; |
| |
| n = dict_lookup(dict, UINT_TO_VOIDPTR(key)); |
| if (n) |
| dq = dnode_get(n); |
| else { |
| if (ext2fs_get_mem(sizeof(struct dquot), &dq)) { |
| log_err("Unable to allocate dquot"); |
| return NULL; |
| } |
| memset(dq, 0, sizeof(struct dquot)); |
| dict_alloc_insert(dict, UINT_TO_VOIDPTR(key), dq); |
| dq->dq_id = key; |
| } |
| return dq; |
| } |
| |
| |
| /* |
| * Called to update the blocks used by a particular inode |
| */ |
| void quota_data_add(quota_ctx_t qctx, struct ext2_inode_large *inode, |
| ext2_ino_t ino EXT2FS_ATTR((unused)), |
| qsize_t space) |
| { |
| struct dquot *dq; |
| dict_t *dict; |
| enum quota_type qtype; |
| |
| if (!qctx) |
| return; |
| |
| log_debug("ADD_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino, |
| inode_uid(*inode), |
| inode_gid(*inode), space); |
| for (qtype = 0; qtype < MAXQUOTAS; qtype++) { |
| if (qtype == PRJQUOTA && !project_quota_valid(qctx)) |
| continue; |
| dict = qctx->quota_dict[qtype]; |
| if (dict) { |
| dq = get_dq(dict, get_qid(inode, qtype)); |
| if (dq) |
| dq->dq_dqb.dqb_curspace += space; |
| } |
| } |
| } |
| |
| /* |
| * Called to remove some blocks used by a particular inode |
| */ |
| void quota_data_sub(quota_ctx_t qctx, struct ext2_inode_large *inode, |
| ext2_ino_t ino EXT2FS_ATTR((unused)), |
| qsize_t space) |
| { |
| struct dquot *dq; |
| dict_t *dict; |
| enum quota_type qtype; |
| |
| if (!qctx) |
| return; |
| |
| log_debug("SUB_DATA: Inode: %u, UID/GID: %u/%u, space: %ld", ino, |
| inode_uid(*inode), |
| inode_gid(*inode), space); |
| for (qtype = 0; qtype < MAXQUOTAS; qtype++) { |
| if (qtype == PRJQUOTA && !project_quota_valid(qctx)) |
| continue; |
| dict = qctx->quota_dict[qtype]; |
| if (dict) { |
| dq = get_dq(dict, get_qid(inode, qtype)); |
| dq->dq_dqb.dqb_curspace -= space; |
| } |
| } |
| } |
| |
| /* |
| * Called to count the files used by an inode's user/group |
| */ |
| void quota_data_inodes(quota_ctx_t qctx, struct ext2_inode_large *inode, |
| ext2_ino_t ino EXT2FS_ATTR((unused)), int adjust) |
| { |
| struct dquot *dq; |
| dict_t *dict; |
| enum quota_type qtype; |
| |
| if (!qctx) |
| return; |
| |
| log_debug("ADJ_INODE: Inode: %u, UID/GID: %u/%u, adjust: %d", ino, |
| inode_uid(*inode), |
| inode_gid(*inode), adjust); |
| for (qtype = 0; qtype < MAXQUOTAS; qtype++) { |
| if (qtype == PRJQUOTA && !project_quota_valid(qctx)) |
| continue; |
| dict = qctx->quota_dict[qtype]; |
| if (dict) { |
| dq = get_dq(dict, get_qid(inode, qtype)); |
| dq->dq_dqb.dqb_curinodes += adjust; |
| } |
| } |
| } |
| |
| errcode_t quota_compute_usage(quota_ctx_t qctx) |
| { |
| ext2_filsys fs; |
| ext2_ino_t ino; |
| errcode_t ret; |
| struct ext2_inode_large *inode; |
| int inode_size; |
| qsize_t space; |
| ext2_inode_scan scan; |
| |
| if (!qctx) |
| return 0; |
| |
| fs = qctx->fs; |
| ret = ext2fs_open_inode_scan(fs, 0, &scan); |
| if (ret) { |
| log_err("while opening inode scan. ret=%ld", ret); |
| return ret; |
| } |
| inode_size = fs->super->s_inode_size; |
| inode = malloc(inode_size); |
| if (!inode) { |
| ext2fs_close_inode_scan(scan); |
| return ENOMEM; |
| } |
| while (1) { |
| ret = ext2fs_get_next_inode_full(scan, &ino, |
| EXT2_INODE(inode), inode_size); |
| if (ret) { |
| log_err("while getting next inode. ret=%ld", ret); |
| ext2fs_close_inode_scan(scan); |
| free(inode); |
| return ret; |
| } |
| if (ino == 0) |
| break; |
| if (inode->i_links_count && |
| (ino == EXT2_ROOT_INO || |
| ino >= EXT2_FIRST_INODE(fs->super))) { |
| space = ext2fs_inode_i_blocks(fs, |
| EXT2_INODE(inode)) << 9; |
| quota_data_add(qctx, inode, ino, space); |
| quota_data_inodes(qctx, inode, ino, +1); |
| } |
| } |
| |
| ext2fs_close_inode_scan(scan); |
| free(inode); |
| return 0; |
| } |
| |
| struct scan_dquots_data { |
| dict_t *quota_dict; |
| int update_limits; /* update limits from disk */ |
| int update_usage; |
| int check_consistency; |
| int usage_is_inconsistent; |
| }; |
| |
| static int scan_dquots_callback(struct dquot *dquot, void *cb_data) |
| { |
| struct scan_dquots_data *scan_data = cb_data; |
| dict_t *quota_dict = scan_data->quota_dict; |
| struct dquot *dq; |
| |
| dq = get_dq(quota_dict, dquot->dq_id); |
| dq->dq_id = dquot->dq_id; |
| dq->dq_flags |= DQF_SEEN; |
| |
| print_dquot("mem", dq); |
| print_dquot("dsk", dquot); |
| |
| /* Check if there is inconsistency */ |
| if (scan_data->check_consistency && |
| (dq->dq_dqb.dqb_curspace != dquot->dq_dqb.dqb_curspace || |
| dq->dq_dqb.dqb_curinodes != dquot->dq_dqb.dqb_curinodes)) { |
| scan_data->usage_is_inconsistent = 1; |
| fprintf(stderr, "[QUOTA WARNING] Usage inconsistent for ID %u:" |
| "actual (%lld, %lld) != expected (%lld, %lld)\n", |
| dq->dq_id, (long long) dq->dq_dqb.dqb_curspace, |
| (long long) dq->dq_dqb.dqb_curinodes, |
| (long long) dquot->dq_dqb.dqb_curspace, |
| (long long) dquot->dq_dqb.dqb_curinodes); |
| } |
| |
| if (scan_data->update_limits) { |
| dq->dq_dqb.dqb_ihardlimit = dquot->dq_dqb.dqb_ihardlimit; |
| dq->dq_dqb.dqb_isoftlimit = dquot->dq_dqb.dqb_isoftlimit; |
| dq->dq_dqb.dqb_bhardlimit = dquot->dq_dqb.dqb_bhardlimit; |
| dq->dq_dqb.dqb_bsoftlimit = dquot->dq_dqb.dqb_bsoftlimit; |
| } |
| |
| if (scan_data->update_usage) { |
| dq->dq_dqb.dqb_curspace = dquot->dq_dqb.dqb_curspace; |
| dq->dq_dqb.dqb_curinodes = dquot->dq_dqb.dqb_curinodes; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Read all dquots from quota file into memory |
| */ |
| static errcode_t quota_read_all_dquots(struct quota_handle *qh, |
| quota_ctx_t qctx, |
| int update_limits EXT2FS_ATTR((unused))) |
| { |
| struct scan_dquots_data scan_data; |
| |
| scan_data.quota_dict = qctx->quota_dict[qh->qh_type]; |
| scan_data.check_consistency = 0; |
| scan_data.update_limits = 0; |
| scan_data.update_usage = 1; |
| |
| return qh->qh_ops->scan_dquots(qh, scan_dquots_callback, &scan_data); |
| } |
| |
| /* |
| * Write all memory dquots into quota file |
| */ |
| #if 0 /* currently unused, but may be useful in the future? */ |
| static errcode_t quota_write_all_dquots(struct quota_handle *qh, |
| quota_ctx_t qctx) |
| { |
| errcode_t err; |
| |
| err = ext2fs_read_bitmaps(qctx->fs); |
| if (err) |
| return err; |
| write_dquots(qctx->quota_dict[qh->qh_type], qh); |
| ext2fs_mark_bb_dirty(qctx->fs); |
| qctx->fs->flags &= ~EXT2_FLAG_SUPER_ONLY; |
| ext2fs_write_bitmaps(qctx->fs); |
| return 0; |
| } |
| #endif |
| |
| /* |
| * Updates the in-memory quota limits from the given quota inode. |
| */ |
| errcode_t quota_update_limits(quota_ctx_t qctx, ext2_ino_t qf_ino, |
| enum quota_type qtype) |
| { |
| struct quota_handle *qh; |
| errcode_t err; |
| |
| if (!qctx) |
| return 0; |
| |
| err = ext2fs_get_mem(sizeof(struct quota_handle), &qh); |
| if (err) { |
| log_debug("Unable to allocate quota handle"); |
| return err; |
| } |
| |
| err = quota_file_open(qctx, qh, qf_ino, qtype, -1, 0); |
| if (err) { |
| log_debug("Open quota file failed"); |
| goto out; |
| } |
| |
| quota_read_all_dquots(qh, qctx, 1); |
| |
| err = quota_file_close(qctx, qh); |
| if (err) { |
| log_debug("Cannot finish IO on new quotafile: %s", |
| strerror(errno)); |
| if (qh->qh_qf.e2_file) |
| ext2fs_file_close(qh->qh_qf.e2_file); |
| } |
| out: |
| ext2fs_free_mem(&qh); |
| return err; |
| } |
| |
| /* |
| * Compares the measured quota in qctx->quota_dict with that in the quota inode |
| * on disk and updates the limits in qctx->quota_dict. 'usage_inconsistent' is |
| * set to 1 if the supplied and on-disk quota usage values are not identical. |
| */ |
| errcode_t quota_compare_and_update(quota_ctx_t qctx, enum quota_type qtype, |
| int *usage_inconsistent) |
| { |
| struct quota_handle qh; |
| struct scan_dquots_data scan_data; |
| struct dquot *dq; |
| dnode_t *n; |
| dict_t *dict = qctx->quota_dict[qtype]; |
| errcode_t err = 0; |
| |
| if (!dict) |
| goto out; |
| |
| err = quota_file_open(qctx, &qh, 0, qtype, -1, 0); |
| if (err) { |
| log_debug("Open quota file failed"); |
| goto out; |
| } |
| |
| scan_data.quota_dict = qctx->quota_dict[qtype]; |
| scan_data.update_limits = 1; |
| scan_data.update_usage = 0; |
| scan_data.check_consistency = 1; |
| scan_data.usage_is_inconsistent = 0; |
| err = qh.qh_ops->scan_dquots(&qh, scan_dquots_callback, &scan_data); |
| if (err) { |
| log_debug("Error scanning dquots"); |
| goto out_close_qh; |
| } |
| |
| for (n = dict_first(dict); n; n = dict_next(dict, n)) { |
| dq = dnode_get(n); |
| if (!dq) |
| continue; |
| if ((dq->dq_flags & DQF_SEEN) == 0) { |
| fprintf(stderr, "[QUOTA WARNING] " |
| "Missing quota entry ID %d\n", dq->dq_id); |
| scan_data.usage_is_inconsistent = 1; |
| } |
| } |
| *usage_inconsistent = scan_data.usage_is_inconsistent; |
| |
| out_close_qh: |
| err = quota_file_close(qctx, &qh); |
| if (err) { |
| log_debug("Cannot close quotafile: %s", error_message(errno)); |
| if (qh.qh_qf.e2_file) |
| ext2fs_file_close(qh.qh_qf.e2_file); |
| } |
| out: |
| return err; |
| } |
| |
| int parse_quota_opts(const char *opts, int (*func)(char *)) |
| { |
| char *buf, *token, *next, *p; |
| int len; |
| int ret = 0; |
| |
| len = strlen(opts); |
| buf = malloc(len + 1); |
| if (!buf) { |
| fprintf(stderr, |
| "Couldn't allocate memory to parse quota options!\n"); |
| return -ENOMEM; |
| } |
| strcpy(buf, opts); |
| for (token = buf; token && *token; token = next) { |
| p = strchr(token, ','); |
| next = 0; |
| if (p) { |
| *p = 0; |
| next = p + 1; |
| } |
| ret = func(token); |
| if (ret) |
| break; |
| } |
| free(buf); |
| return ret; |
| } |