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/*
* libdpkg - Debian packaging suite library routines
* ar.c - primitives for ar handling
*
* Copyright © 2010 Guillem Jover <guillem@debian.org>
*
* This 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 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 <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <compat.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <dpkg/i18n.h>
#include <dpkg/dpkg.h>
#include <dpkg/fdio.h>
#include <dpkg/buffer.h>
#include <dpkg/ar.h>
struct dpkg_ar *
dpkg_ar_fdopen(const char *filename, int fd)
{
struct dpkg_ar *ar;
struct stat st;
if (fstat(fd, &st) != 0)
ohshite(_("failed to fstat archive"));
ar = m_malloc(sizeof(*ar));
ar->name = filename;
ar->mode = st.st_mode;
ar->size = st.st_size;
ar->time = st.st_mtime;
ar->fd = fd;
return ar;
}
struct dpkg_ar *
dpkg_ar_open(const char *filename)
{
int fd;
if (strcmp(filename, "-") == 0)
fd = STDIN_FILENO;
else
fd = open(filename, O_RDONLY);
if (fd < 0)
ohshite(_("failed to read archive '%.255s'"), filename);
return dpkg_ar_fdopen(filename, fd);
}
struct dpkg_ar *
dpkg_ar_create(const char *filename, mode_t mode)
{
int fd;
fd = creat(filename, mode);
if (fd < 0)
ohshite(_("unable to create '%.255s'"), filename);
return dpkg_ar_fdopen(filename, fd);
}
void
dpkg_ar_set_mtime(struct dpkg_ar *ar, intmax_t mtime)
{
ar->time = mtime;
}
void
dpkg_ar_close(struct dpkg_ar *ar)
{
if (close(ar->fd))
ohshite(_("unable to close file '%s'"), ar->name);
free(ar);
}
static void
dpkg_ar_member_init(struct dpkg_ar *ar, struct dpkg_ar_member *member,
const char *name, off_t size)
{
member->name = name;
member->size = size;
member->time = ar->time;
member->mode = 0100644;
member->uid = 0;
member->gid = 0;
}
void
dpkg_ar_normalize_name(struct dpkg_ar_hdr *arh)
{
char *name = arh->ar_name;
int i;
/* Remove trailing spaces from the member name. */
for (i = sizeof(arh->ar_name) - 1; i >= 0 && name[i] == ' '; i--)
name[i] = '\0';
/* Remove optional slash terminator (on GNU-style archives). */
if (i >= 0 && name[i] == '/')
name[i] = '\0';
}
off_t
dpkg_ar_member_get_size(struct dpkg_ar *ar, struct dpkg_ar_hdr *arh)
{
const char *str = arh->ar_size;
int len = sizeof(arh->ar_size);
off_t size = 0;
while (len && *str == ' ')
str++, len--;
while (len--) {
if (*str == ' ')
break;
if (*str < '0' || *str > '9')
ohshit(_("invalid character '%c' in archive '%.250s' "
"member '%.16s' size"),
*str, ar->name, arh->ar_name);
size *= 10;
size += *str++ - '0';
}
return size;
}
bool
dpkg_ar_member_is_illegal(struct dpkg_ar_hdr *arh)
{
return memcmp(arh->ar_fmag, DPKG_AR_FMAG, sizeof(arh->ar_fmag)) != 0;
}
void
dpkg_ar_put_magic(struct dpkg_ar *ar)
{
if (fd_write(ar->fd, DPKG_AR_MAGIC, strlen(DPKG_AR_MAGIC)) < 0)
ohshite(_("unable to write file '%s'"), ar->name);
}
void
dpkg_ar_member_put_header(struct dpkg_ar *ar, struct dpkg_ar_member *member)
{
char header[sizeof(struct dpkg_ar_hdr) + 1];
int n;
if (strlen(member->name) > 15)
ohshit(_("ar member name '%s' length too long"), member->name);
if (member->size > 9999999999L)
ohshit(_("ar member size %jd too large"), (intmax_t)member->size);
if (member->time > 999999999999L)
ohshit(_("ar member time %jd too large"), (intmax_t)member->time);
n = snprintf(header, sizeof(struct dpkg_ar_hdr) + 1,
"%-16s%-12jd%-6lu%-6lu%-8lo%-10jd`\n",
member->name, (intmax_t)member->time,
(unsigned long)member->uid, (unsigned long)member->gid,
(unsigned long)member->mode, (intmax_t)member->size);
if (n != sizeof(struct dpkg_ar_hdr))
ohshit(_("generated corrupt ar header for '%s'"), ar->name);
if (fd_write(ar->fd, header, n) < 0)
ohshite(_("unable to write file '%s'"), ar->name);
}
void
dpkg_ar_member_put_mem(struct dpkg_ar *ar,
const char *name, const void *data, size_t size)
{
struct dpkg_ar_member member;
dpkg_ar_member_init(ar, &member, name, size);
dpkg_ar_member_put_header(ar, &member);
/* Copy data contents. */
if (fd_write(ar->fd, data, size) < 0)
ohshite(_("unable to write file '%s'"), ar->name);
if (size & 1)
if (fd_write(ar->fd, "\n", 1) < 0)
ohshite(_("unable to write file '%s'"), ar->name);
}
void
dpkg_ar_member_put_file(struct dpkg_ar *ar,
const char *name, int fd, off_t size)
{
struct dpkg_error err;
struct dpkg_ar_member member;
if (size <= 0) {
struct stat st;
if (fstat(fd, &st))
ohshite(_("failed to fstat ar member file (%s)"), name);
size = st.st_size;
}
dpkg_ar_member_init(ar, &member, name, size);
dpkg_ar_member_put_header(ar, &member);
/* Copy data contents. */
if (fd_fd_copy(fd, ar->fd, size, &err) < 0)
ohshit(_("cannot append ar member file (%s) to '%s': %s"),
name, ar->name, err.str);
if (size & 1)
if (fd_write(ar->fd, "\n", 1) < 0)
ohshite(_("unable to write file '%s'"), ar->name);
}
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