static int vss_operate(int operation) { char *fs_op; char match[] = "/dev/"; FILE *mounts; struct mntent *ent; unsigned int cmd; int error = 0, root_seen = 0; switch (operation) { case VSS_OP_FREEZE: cmd = FIFREEZE; fs_op = "freeze"; break; case VSS_OP_THAW: cmd = FITHAW; fs_op = "thaw"; break; default: return -1; } mounts = setmntent("/proc/mounts", "r"); if (mounts == NULL) return -1; while ((ent = getmntent(mounts))) { if (strncmp(ent->mnt_fsname, match, strlen(match))) continue; if (strcmp(ent->mnt_type, "iso9660") == 0) continue; if (strcmp(ent->mnt_dir, "/") == 0) { root_seen = 1; continue; } error |= vss_do_freeze(ent->mnt_dir, cmd, fs_op); } endmntent(mounts); if (root_seen) { error |= vss_do_freeze("/", cmd, fs_op); } return error; }
static int vss_operate(int operation) { char match[] = "/dev/"; FILE *mounts; struct mntent *ent; char errdir[1024] = {0}; unsigned int cmd; int error = 0, root_seen = 0, save_errno = 0; switch (operation) { case VSS_OP_FREEZE: cmd = FIFREEZE; break; case VSS_OP_THAW: cmd = FITHAW; break; default: return -1; } mounts = setmntent("/proc/mounts", "r"); if (mounts == NULL) return -1; while ((ent = getmntent(mounts))) { if (strncmp(ent->mnt_fsname, match, strlen(match))) continue; if (hasmntopt(ent, MNTOPT_RO) != NULL) continue; if (strcmp(ent->mnt_type, "vfat") == 0) continue; if (strcmp(ent->mnt_dir, "/") == 0) { root_seen = 1; continue; } error |= vss_do_freeze(ent->mnt_dir, cmd); if (error && operation == VSS_OP_FREEZE) goto err; } endmntent(mounts); if (root_seen) { error |= vss_do_freeze("/", cmd); if (error && operation == VSS_OP_FREEZE) goto err; } goto out; err: save_errno = errno; if (ent) { strncpy(errdir, ent->mnt_dir, sizeof(errdir)-1); endmntent(mounts); } vss_operate(VSS_OP_THAW); /* Call syslog after we thaw all filesystems */ if (ent) syslog(LOG_ERR, "FREEZE of %s failed; error:%d %s", errdir, save_errno, strerror(save_errno)); else syslog(LOG_ERR, "FREEZE of / failed; error:%d %s", save_errno, strerror(save_errno)); out: return error; }