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pacman/lib/libalpm/be_files.c

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/*
* be_files.c
*
* Copyright (c) 2006 by Christian Hamar <krics@linuxforum.hu>
* Copyright (c) 2006 by Miklos Vajna <vmiklos@frugalware.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdint.h> /* uintmax_t */
#include <sys/stat.h>
#include <dirent.h>
#include <ctype.h>
#include <time.h>
#include <limits.h> /* PATH_MAX */
#include <locale.h> /* setlocale */
/* libalpm */
#include "db.h"
#include "alpm_list.h"
#include "log.h"
#include "util.h"
#include "alpm.h"
#include "error.h"
#include "handle.h"
#include "package.h"
#include "delta.h"
#include "deps.h"
/* This function is used to convert the downloaded db file to the proper backend
* format
*/
int _alpm_db_install(pmdb_t *db, const char *dbfile)
{
ALPM_LOG_FUNC;
/* TODO we should not simply unpack the archive, but better parse it and
* db_write each entry (see sync_load_dbarchive to get archive content) */
_alpm_log(PM_LOG_DEBUG, "unpacking database '%s'\n", dbfile);
if(_alpm_unpack(dbfile, db->path, NULL)) {
RET_ERR(PM_ERR_SYSTEM, -1);
}
return unlink(dbfile);
}
int _alpm_db_open(pmdb_t *db)
{
ALPM_LOG_FUNC;
if(db == NULL) {
RET_ERR(PM_ERR_DB_NULL, -1);
}
_alpm_log(PM_LOG_DEBUG, "opening database from path '%s'\n", db->path);
db->handle = opendir(db->path);
if(db->handle == NULL) {
RET_ERR(PM_ERR_DB_OPEN, -1);
}
return(0);
}
void _alpm_db_close(pmdb_t *db)
{
ALPM_LOG_FUNC;
if(db == NULL) {
return;
}
if(db->handle) {
closedir(db->handle);
db->handle = NULL;
}
}
void _alpm_db_rewind(pmdb_t *db)
{
ALPM_LOG_FUNC;
if(db == NULL || db->handle == NULL) {
return;
}
rewinddir(db->handle);
}
static int _alpm_db_splitname(const char *target, char *name, char *version)
{
/* the format of a db entry is as follows:
* package-version-rel/
* package name can contain hyphens, so parse from the back- go back
* two hyphens and we have split the version from the name.
*/
char *tmp, *p, *q;
if(target == NULL) {
return(-1);
}
tmp = strdup(target);
p = tmp + strlen(tmp);
/* do the magic parsing- find the beginning of the version string
* by doing two iterations of same loop to lop off two hyphens */
for(q = --p; *q && *q != '-'; q--);
for(p = --q; *p && *p != '-'; p--);
if(*p != '-' || p == tmp) {
return(-1);
}
/* copy into fields and return */
if(version) {
strncpy(version, p+1, PKG_VERSION_LEN);
}
/* insert a terminator at the end of the name (on hyphen)- then copy it */
*p = '\0';
if(name) {
strncpy(name, tmp, PKG_NAME_LEN);
}
free(tmp);
return(0);
}
pmpkg_t *_alpm_db_scan(pmdb_t *db, const char *target)
{
struct dirent *ent = NULL;
struct stat sbuf;
char path[PATH_MAX];
char name[PKG_FULLNAME_LEN];
char *ptr = NULL;
int found = 0;
pmpkg_t *pkg = NULL;
ALPM_LOG_FUNC;
if(db == NULL) {
RET_ERR(PM_ERR_DB_NULL, NULL);
}
/* We loop here until we read a valid package. When an iteration of this loop
* fails, it means alpm_db_read failed to read a valid package, so we'll read
* the next so as not to abort whole-db operations early
*/
while(!pkg) {
if(target != NULL) {
/* search for a specific package (by name only) */
rewinddir(db->handle);
while(!found && (ent = readdir(db->handle)) != NULL) {
if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) {
continue;
}
/* stat the entry, make sure it's a directory */
snprintf(path, PATH_MAX, "%s/%s", db->path, ent->d_name);
if(stat(path, &sbuf) || !S_ISDIR(sbuf.st_mode)) {
continue;
}
strncpy(name, ent->d_name, PKG_FULLNAME_LEN);
/* truncate the string at the second-to-last hyphen, */
/* which will give us the package name */
if((ptr = rindex(name, '-'))) {
*ptr = '\0';
}
if((ptr = rindex(name, '-'))) {
*ptr = '\0';
}
if(!strcmp(name, target)) {
found = 1;
}
}
if(!found) {
return(NULL);
}
} else { /* target == NULL, full scan */
int isdir = 0;
while(!isdir) {
ent = readdir(db->handle);
if(ent == NULL) {
return(NULL);
}
if(!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, "..")) {
isdir = 0;
continue;
}
/* stat the entry, make sure it's a directory */
snprintf(path, PATH_MAX, "%s/%s", db->path, ent->d_name);
if(!stat(path, &sbuf) && S_ISDIR(sbuf.st_mode)) {
isdir = 1;
}
}
}
pkg = _alpm_pkg_new(NULL, NULL);
if(pkg == NULL) {
_alpm_log(PM_LOG_DEBUG, "db scan could not find package: %s\n", target);
return(NULL);
}
/* split the db entry name */
if(_alpm_db_splitname(ent->d_name, pkg->name, pkg->version) != 0) {
_alpm_log(PM_LOG_ERROR, _("invalid name for database entry '%s'\n"),
ent->d_name);
alpm_pkg_free(pkg);
pkg = NULL;
continue;
}
/* explicitly read with only 'BASE' data, accessors will handle the rest */
if(_alpm_db_read(db, pkg, INFRQ_BASE) == -1) {
/* TODO removed corrupt entry from the FS here */
_alpm_pkg_free(pkg);
} else {
pkg->origin = PKG_FROM_CACHE;
pkg->origin_data.db = db;
}
}
return(pkg);
}
int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
{
FILE *fp = NULL;
struct stat buf;
char path[PATH_MAX+1];
char line[513];
ALPM_LOG_FUNC;
if(db == NULL) {
RET_ERR(PM_ERR_DB_NULL, -1);
}
if(info == NULL || info->name[0] == 0 || info->version[0] == 0) {
_alpm_log(PM_LOG_DEBUG, "invalid package entry provided to _alpm_db_read, skipping\n");
return(-1);
}
if(info->origin == PKG_FROM_FILE) {
_alpm_log(PM_LOG_DEBUG, "request to read database info for a file-based package '%s', skipping...\n", info->name);
return(-1);
}
/* bitmask logic here:
* infolevel: 00001111
* inforeq: 00010100
* & result: 00000100
* == to inforeq? nope, we need to load more info. */
if((info->infolevel & inforeq) == inforeq) {
/* already loaded this info, do nothing */
return(0);
}
_alpm_log(PM_LOG_FUNCTION, _("loading package data for %s : level=%d\n"), info->name, inforeq);
/* clear out 'line', to be certain - and to make valgrind happy */
memset(line, 0, 513);
snprintf(path, PATH_MAX, "%s/%s-%s", db->path, info->name, info->version);
if(stat(path, &buf)) {
/* directory doesn't exist or can't be opened */
_alpm_log(PM_LOG_DEBUG, "cannot find '%s-%s' in db '%s'\n",
info->name, info->version, db->treename);
return(-1);
}
/* DESC */
if(inforeq & INFRQ_DESC) {
snprintf(path, PATH_MAX, "%s/%s-%s/desc", db->path, info->name, info->version);
if((fp = fopen(path, "r")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
goto error;
}
while(!feof(fp)) {
if(fgets(line, 256, fp) == NULL) {
break;
}
_alpm_strtrim(line);
if(!strcmp(line, "%FILENAME%")) {
/* filename is _new_ - it provides the real name of the package, on the
* server, to allow for us to not tie the name of the actual file to the
* data of the package
*/
if(fgets(info->filename, sizeof(info->filename), fp) == NULL) {
goto error;
}
_alpm_strtrim(info->filename);
} else if(!strcmp(line, "%DESC%")) {
if(fgets(info->desc, sizeof(info->desc), fp) == NULL) {
goto error;
}
_alpm_strtrim(info->desc);
} else if(!strcmp(line, "%GROUPS%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->groups = alpm_list_add(info->groups, strdup(line));
}
} else if(!strcmp(line, "%URL%")) {
if(fgets(info->url, sizeof(info->url), fp) == NULL) {
goto error;
}
_alpm_strtrim(info->url);
} else if(!strcmp(line, "%LICENSE%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->licenses = alpm_list_add(info->licenses, strdup(line));
}
} else if(!strcmp(line, "%ARCH%")) {
if(fgets(info->arch, sizeof(info->arch), fp) == NULL) {
goto error;
}
_alpm_strtrim(info->arch);
} else if(!strcmp(line, "%BUILDDATE%")) {
char tmp[32];
if(fgets(tmp, sizeof(tmp), fp) == NULL) {
goto error;
}
_alpm_strtrim(tmp);
char first = tolower(tmp[0]);
if(first > 'a' && first < 'z') {
struct tm tmp_tm = {0}; //initialize to null incase of failure
setlocale(LC_TIME, "C");
strptime(tmp, "%a %b %e %H:%M:%S %Y", &tmp_tm);
info->builddate = mktime(&tmp_tm);
setlocale(LC_TIME, "");
} else {
info->builddate = atol(tmp);
}
} else if(!strcmp(line, "%INSTALLDATE%")) {
char tmp[32];
if(fgets(tmp, sizeof(tmp), fp) == NULL) {
goto error;
}
_alpm_strtrim(tmp);
char first = tolower(tmp[0]);
if(first > 'a' && first < 'z') {
struct tm tmp_tm = {0}; //initialize to null incase of failure
setlocale(LC_TIME, "C");
strptime(tmp, "%a %b %e %H:%M:%S %Y", &tmp_tm);
info->installdate = mktime(&tmp_tm);
setlocale(LC_TIME, "");
} else {
info->installdate = atol(tmp);
}
} else if(!strcmp(line, "%PACKAGER%")) {
if(fgets(info->packager, sizeof(info->packager), fp) == NULL) {
goto error;
}
_alpm_strtrim(info->packager);
} else if(!strcmp(line, "%REASON%")) {
char tmp[32];
if(fgets(tmp, sizeof(tmp), fp) == NULL) {
goto error;
}
_alpm_strtrim(tmp);
info->reason = atol(tmp);
} else if(!strcmp(line, "%SIZE%") || !strcmp(line, "%CSIZE%")) {
/* NOTE: the CSIZE and SIZE fields both share the "size" field
* in the pkginfo_t struct. This can be done b/c CSIZE
* is currently only used in sync databases, and SIZE is
* only used in local databases.
*/
char tmp[32];
if(fgets(tmp, sizeof(tmp), fp) == NULL) {
goto error;
}
_alpm_strtrim(tmp);
info->size = atol(tmp);
/* also store this value to isize if isize is unset */
if(info->isize == 0) {
info->isize = atol(tmp);
}
} else if(!strcmp(line, "%ISIZE%")) {
/* ISIZE (installed size) tag only appears in sync repositories,
* not the local one. */
char tmp[32];
if(fgets(tmp, sizeof(tmp), fp) == NULL) {
goto error;
}
_alpm_strtrim(tmp);
info->isize = atol(tmp);
} else if(!strcmp(line, "%MD5SUM%")) {
/* MD5SUM tag only appears in sync repositories,
* not the local one. */
if(fgets(info->md5sum, sizeof(info->md5sum), fp) == NULL) {
goto error;
}
} else if(!strcmp(line, "%REPLACES%")) {
/* the REPLACES tag is special -- it only appears in sync repositories,
* not the local one. */
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->replaces = alpm_list_add(info->replaces, strdup(line));
}
} else if(!strcmp(line, "%FORCE%")) {
/* FORCE tag only appears in sync repositories,
* not the local one. */
info->force = 1;
}
}
fclose(fp);
fp = NULL;
}
/* FILES */
if(inforeq & INFRQ_FILES) {
snprintf(path, PATH_MAX, "%s/%s-%s/files", db->path, info->name, info->version);
if((fp = fopen(path, "r")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
goto error;
}
while(fgets(line, 256, fp)) {
_alpm_strtrim(line);
if(!strcmp(line, "%FILES%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->files = alpm_list_add(info->files, strdup(line));
}
} else if(!strcmp(line, "%BACKUP%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->backup = alpm_list_add(info->backup, strdup(line));
}
}
}
fclose(fp);
fp = NULL;
}
/* DEPENDS */
if(inforeq & INFRQ_DEPENDS) {
snprintf(path, PATH_MAX, "%s/%s-%s/depends", db->path, info->name, info->version);
if((fp = fopen(path, "r")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
goto error;
}
while(!feof(fp)) {
fgets(line, 255, fp);
_alpm_strtrim(line);
if(!strcmp(line, "%DEPENDS%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
pmdepend_t *dep = alpm_splitdep(line);
info->depends = alpm_list_add(info->depends, dep);
}
} else if(!strcmp(line, "%OPTDEPENDS%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->optdepends = alpm_list_add(info->optdepends, strdup(line));
}
} else if(!strcmp(line, "%CONFLICTS%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->conflicts = alpm_list_add(info->conflicts, strdup(line));
}
} else if(!strcmp(line, "%PROVIDES%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->provides = alpm_list_add(info->provides, strdup(line));
}
}
/* TODO: we were going to move these things here, but it should wait.
* A better change would be to figure out how to restructure the DB. */
/* else if(!strcmp(line, "%REPLACES%")) {
* the REPLACES tag is special -- it only appears in sync repositories,
* not the local one. *
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->replaces = alpm_list_add(info->replaces, strdup(line));
}
} else if(!strcmp(line, "%FORCE%")) {
* FORCE tag only appears in sync repositories,
* not the local one. *
info->force = 1;
} */
}
fclose(fp);
fp = NULL;
}
/* DELTAS */
if(inforeq & INFRQ_DELTAS) {
snprintf(path, PATH_MAX, "%s/%s-%s/deltas", db->path, info->name, info->version);
if((fp = fopen(path, "r"))) {
while(!feof(fp)) {
fgets(line, 255, fp);
_alpm_strtrim(line);
if(!strcmp(line, "%DELTAS%")) {
while(fgets(line, 512, fp) && strlen(_alpm_strtrim(line))) {
info->deltas = alpm_list_add(info->deltas, _alpm_delta_parse(line));
}
}
}
fclose(fp);
fp = NULL;
}
}
/* INSTALL */
if(inforeq & INFRQ_SCRIPTLET) {
snprintf(path, PATH_MAX, "%s/%s-%s/install", db->path, info->name, info->version);
if(!stat(path, &buf)) {
info->scriptlet = 1;
}
}
/* internal */
info->infolevel |= inforeq;
return(0);
error:
if(fp) {
fclose(fp);
}
return(-1);
}
int _alpm_db_write(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
{
FILE *fp = NULL;
char path[PATH_MAX];
mode_t oldmask;
alpm_list_t *lp = NULL;
int retval = 0;
int local = 0;
ALPM_LOG_FUNC;
if(db == NULL || info == NULL) {
return(-1);
}
snprintf(path, PATH_MAX, "%s/%s-%s", db->path, info->name, info->version);
oldmask = umask(0000);
mkdir(path, 0755);
/* make sure we have a sane umask */
umask(0022);
if(strcmp(db->treename, "local") == 0) {
local = 1;
}
/* DESC */
if(inforeq & INFRQ_DESC) {
_alpm_log(PM_LOG_DEBUG, "writing %s-%s DESC information back to db\n",
info->name, info->version);
snprintf(path, PATH_MAX, "%s/%s-%s/desc", db->path, info->name, info->version);
if((fp = fopen(path, "w")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
retval = -1;
goto cleanup;
}
fprintf(fp, "%%NAME%%\n%s\n\n"
"%%VERSION%%\n%s\n\n", info->name, info->version);
if(info->desc[0]) {
fprintf(fp, "%%DESC%%\n"
"%s\n\n", info->desc);
}
if(info->groups) {
fputs("%GROUPS%\n", fp);
for(lp = info->groups; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char *)lp->data);
}
fprintf(fp, "\n");
}
if(local) {
if(info->url[0]) {
fprintf(fp, "%%URL%%\n"
"%s\n\n", info->url);
}
if(info->licenses) {
fputs("%LICENSE%\n", fp);
for(lp = info->licenses; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char *)lp->data);
}
fprintf(fp, "\n");
}
if(info->arch[0]) {
fprintf(fp, "%%ARCH%%\n"
"%s\n\n", info->arch);
}
if(info->builddate) {
fprintf(fp, "%%BUILDDATE%%\n"
"%ju\n\n", (uintmax_t)info->builddate);
}
if(info->installdate) {
fprintf(fp, "%%INSTALLDATE%%\n"
"%ju\n\n", (uintmax_t)info->installdate);
}
if(info->packager[0]) {
fprintf(fp, "%%PACKAGER%%\n"
"%s\n\n", info->packager);
}
if(info->size) {
/* only write installed size, csize is irrelevant once installed */
fprintf(fp, "%%SIZE%%\n"
"%lu\n\n", info->isize);
}
if(info->reason) {
fprintf(fp, "%%REASON%%\n"
"%u\n\n", info->reason);
}
} else {
if(info->size) {
fprintf(fp, "%%CSIZE%%\n"
"%lu\n\n", info->size);
}
if(info->isize) {
fprintf(fp, "%%ISIZE%%\n"
"%lu\n\n", info->isize);
}
if(info->md5sum) {
fprintf(fp, "%%MD5SUM%%\n"
"%s\n\n", info->md5sum);
}
}
fclose(fp);
fp = NULL;
}
/* FILES */
if(local && (inforeq & INFRQ_FILES)) {
_alpm_log(PM_LOG_DEBUG, "writing %s-%s FILES information back to db\n",
info->name, info->version);
snprintf(path, PATH_MAX, "%s/%s-%s/files", db->path, info->name, info->version);
if((fp = fopen(path, "w")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
retval = -1;
goto cleanup;
}
if(info->files) {
fprintf(fp, "%%FILES%%\n");
for(lp = info->files; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char *)lp->data);
}
fprintf(fp, "\n");
}
if(info->backup) {
fprintf(fp, "%%BACKUP%%\n");
for(lp = info->backup; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char *)lp->data);
}
fprintf(fp, "\n");
}
fclose(fp);
fp = NULL;
}
/* DEPENDS */
if(inforeq & INFRQ_DEPENDS) {
_alpm_log(PM_LOG_DEBUG, "writing %s-%s DEPENDS information back to db\n",
info->name, info->version);
snprintf(path, PATH_MAX, "%s/%s-%s/depends", db->path, info->name, info->version);
if((fp = fopen(path, "w")) == NULL) {
_alpm_log(PM_LOG_ERROR, _("could not open file %s: %s\n"), path, strerror(errno));
retval = -1;
goto cleanup;
}
if(info->depends) {
fputs("%DEPENDS%\n", fp);
for(lp = info->depends; lp; lp = lp->next) {
char *depstring = alpm_dep_get_string(lp->data);
fprintf(fp, "%s\n", depstring);
free(depstring);
}
fprintf(fp, "\n");
}
if(info->optdepends) {
fputs("%OPTDEPENDS%\n", fp);
for(lp = info->optdepends; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char *)lp->data);
}
fprintf(fp, "\n");
}
if(info->conflicts) {
fputs("%CONFLICTS%\n", fp);
for(lp = info->conflicts; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char *)lp->data);
}
fprintf(fp, "\n");
}
if(info->provides) {
fputs("%PROVIDES%\n", fp);
for(lp = info->provides; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char *)lp->data);
}
fprintf(fp, "\n");
}
if(!local) {
if(info->replaces) {
fputs("%REPLACES%\n", fp);
for(lp = info->replaces; lp; lp = lp->next) {
fprintf(fp, "%s\n", (char *)lp->data);
}
fprintf(fp, "\n");
}
if(info->force) {
fprintf(fp, "%%FORCE%%\n"
"\n");
}
}
fclose(fp);
fp = NULL;
}
/* INSTALL */
/* nothing needed here (script is automatically extracted) */
cleanup:
umask(oldmask);
if(fp) {
fclose(fp);
}
return(retval);
}
int _alpm_db_remove(pmdb_t *db, pmpkg_t *info)
{
char path[PATH_MAX];
ALPM_LOG_FUNC;
if(db == NULL || info == NULL) {
RET_ERR(PM_ERR_DB_NULL, -1);
}
snprintf(path, PATH_MAX, "%s%s-%s", db->path, info->name, info->version);
if(_alpm_rmrf(path) == -1) {
return(-1);
}
return(0);
}
/*
* Return the last update time as number of seconds from the epoch.
* Returns 0 if the value is unknown or can't be read.
*/
time_t _alpm_db_getlastupdate(const pmdb_t *db)
{
FILE *fp;
char file[PATH_MAX];
time_t ret = 0;
ALPM_LOG_FUNC;
if(db == NULL) {
return(ret);
}
snprintf(file, PATH_MAX, "%s.lastupdate", db->path);
/* get the last update time, if it's there */
if((fp = fopen(file, "r")) == NULL) {
return(ret);
} else {
char line[64];
if(fgets(line, sizeof(line), fp)) {
ret = atol(line);
}
}
fclose(fp);
return(ret);
}
/*
* writes the dbpath/.lastupdate file with the value in time
*/
int _alpm_db_setlastupdate(const pmdb_t *db, time_t time)
{
FILE *fp;
char file[PATH_MAX];
int ret = 0;
ALPM_LOG_FUNC;
if(db == NULL || time == 0) {
return(-1);
}
snprintf(file, PATH_MAX, "%s.lastupdate", db->path);
if((fp = fopen(file, "w")) == NULL) {
return(-1);
}
if(fprintf(fp, "%ju", (uintmax_t)time) <= 0) {
ret = -1;
}
fclose(fp);
return(ret);
}
/* vim: set ts=2 sw=2 noet: */
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