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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, time_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 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 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 ar_hdr *arh)
- {
- return memcmp(arh->ar_fmag, ARFMAG, 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 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"), member->size);
- n = sprintf(header, "%-16s%-12lu%-6lu%-6lu%-8lo%-10jd`\n",
- member->name, (unsigned long)member->time,
- (unsigned long)member->uid, (unsigned long)member->gid,
- (unsigned long)member->mode, (intmax_t)member->size);
- if (n != sizeof(struct 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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