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|
/*
* dpkg-deb - construction and deconstruction of *.deb archives
* build.c - building archives
*
* Copyright © 1994,1995 Ian Jackson <ian@chiark.greenend.org.uk>
* Copyright © 2000,2001 Wichert Akkerman <wakkerma@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,
* 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 dpkg; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <compat.h>
#include <dpkg/i18n.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <errno.h>
#include <unistd.h>
#include <dirent.h>
#include <limits.h>
#include <ctype.h>
#include <assert.h>
#ifdef WITH_ZLIB
#include <zlib.h>
#endif
#include <dpkg/dpkg.h>
#include <dpkg/dpkg-db.h>
#include <dpkg/path.h>
#include <dpkg/buffer.h>
#include <dpkg/subproc.h>
#include <dpkg/myopt.h>
#include "dpkg-deb.h"
#ifndef S_ISLNK
# define S_ISLNK(mode) ((mode&0xF000) == S_IFLNK)
#endif
/* Simple structure to store information about a file.
*/
struct _finfo {
struct stat st;
char* fn;
struct _finfo* next;
};
static const char *arbitrary_fields[] = {
"Package-Type",
"Subarchitecture",
"Kernel-Version",
"Installer-Menu-Item",
"Homepage",
"Tag",
NULL
};
static const char *private_prefix = "Private-";
static int known_arbitrary_field(const struct arbitraryfield *field) {
const char **known;
/* Always accept fields starting with a private field prefix. */
if (strncasecmp(field->name, private_prefix, strlen(private_prefix)) == 0)
return 1;
for (known= arbitrary_fields; *known; known++)
if (strcasecmp(field->name, *known) == 0)
return 1;
return 0;
}
/* Do a quick check if vstring is a valid versionnumber. Valid in this case
* means it contains at least one digit. If an error is found increment
* *errs.
*/
static void checkversion(const char *vstring, const char *valuename, int *errs) {
const char *p;
if (!vstring || !*vstring) return;
for (p=vstring; *p; p++) if (cisdigit(*p)) return;
fprintf(stderr, _("dpkg-deb - error: %s (`%s') doesn't contain any digits\n"),
valuename, vstring);
(*errs)++;
}
/* Read the next filename from a filedescriptor and create a _info struct
* for it. If there is nothing to read return NULL.
*/
static struct _finfo* getfi(const char* root, int fd) {
static char* fn = NULL;
static size_t fnlen = 0;
size_t i= 0;
struct _finfo *fi;
size_t rl = strlen(root);
if (fn == NULL) {
fnlen = rl + MAXFILENAME;
fn = m_malloc(fnlen);
} else if (fnlen < (rl + MAXFILENAME)) {
fnlen = rl + MAXFILENAME;
fn = m_realloc(fn, fnlen);
}
i=sprintf(fn,"%s/",root);
while (1) {
int res;
if (i>=fnlen) {
fnlen += MAXFILENAME;
fn = m_realloc(fn, fnlen);
}
if ((res=read(fd, (fn+i), sizeof(*fn)))<0) {
if ((errno==EINTR) || (errno==EAGAIN))
continue;
else
return NULL;
}
if (res==0) // EOF -> parent died
return NULL;
if (fn[i] == '\0')
break;
i++;
if (i >= MAXFILENAME)
ohshit(_("file name '%.50s...' is too long"), fn + rl + 1);
}
fi = m_malloc(sizeof(struct _finfo));
lstat(fn, &(fi->st));
fi->fn = m_strdup(fn + rl + 1);
fi->next=NULL;
return fi;
}
/* Add a new _finfo struct to a single linked list of _finfo structs.
* We perform a slight optimization to work around a `feature' in tar: tar
* always recurses into subdirectories if you list a subdirectory. So if an
* entry is added and the previous entry in the list is its subdirectory we
* remove the subdirectory.
*
* After a _finfo struct is added to a list it may no longer be freed, we
* assume full responsibility for its memory.
*/
static void add_to_filist(struct _finfo* fi, struct _finfo** start, struct _finfo **end) {
if (*start==NULL)
*start=*end=fi;
else
*end=(*end)->next=fi;
}
/* Free the memory for all entries in a list of _finfo structs
*/
static void free_filist(struct _finfo* fi) {
while (fi) {
struct _finfo* fl;
free(fi->fn);
fl=fi; fi=fi->next;
free(fl);
}
}
/* Overly complex function that builds a .deb file
*/
void do_build(const char *const *argv) {
static const char *const maintainerscripts[]= {
PREINSTFILE, POSTINSTFILE, PRERMFILE, POSTRMFILE, NULL
};
char *m;
const char *debar, *directory, *const *mscriptp, *versionstring, *arch;
char *controlfile, *tfbuf;
const char *envbuf;
struct pkginfo *checkedinfo;
struct arbitraryfield *field;
FILE *ar, *cf;
int p1[2],p2[2],p3[2], warns, errs, n, c, subdir, gzfd;
pid_t c1,c2,c3;
struct stat controlstab, datastab, mscriptstab, debarstab;
char conffilename[MAXCONFFILENAME+1];
time_t thetime= 0;
struct _finfo *fi;
struct _finfo *symlist = NULL;
struct _finfo *symlist_end = NULL;
/* Decode our arguments */
directory = *argv++;
if (!directory)
badusage(_("--%s needs a <directory> argument"), cipaction->olong);
/* template for our tempfiles */
if ((envbuf= getenv("TMPDIR")) == NULL)
envbuf= P_tmpdir;
tfbuf = m_malloc(strlen(envbuf) + 13);
strcpy(tfbuf,envbuf);
strcat(tfbuf,"/dpkg.XXXXXX");
subdir= 0;
debar = *argv++;
if (debar != NULL) {
if (*argv) badusage(_("--build takes at most two arguments"));
if (debar) {
if (stat(debar,&debarstab)) {
if (errno != ENOENT)
ohshite(_("unable to check for existence of archive `%.250s'"),debar);
} else if (S_ISDIR(debarstab.st_mode)) {
subdir= 1;
}
}
} else {
m= m_malloc(strlen(directory) + sizeof(DEBEXT));
strcpy(m, directory);
path_rtrim_slash_slashdot(m);
strcat(m, DEBEXT);
debar= m;
}
/* Perform some sanity checks on the to-be-build package.
*/
if (nocheckflag) {
if (subdir)
ohshit(_("target is directory - cannot skip control file check"));
warning(_("not checking contents of control area."));
printf(_("dpkg-deb: building an unknown package in '%s'.\n"), debar);
} else {
controlfile= m_malloc(strlen(directory) + sizeof(BUILDCONTROLDIR) +
sizeof(CONTROLFILE) + sizeof(CONFFILESFILE) +
sizeof(POSTINSTFILE) + sizeof(PREINSTFILE) +
sizeof(POSTRMFILE) + sizeof(PRERMFILE) +
MAXCONFFILENAME + 5);
/* Lets start by reading in the control-file so we can check its contents */
strcpy(controlfile, directory);
strcat(controlfile, "/" BUILDCONTROLDIR "/" CONTROLFILE);
warns= 0; errs= 0;
parsedb(controlfile, pdb_recordavailable|pdb_rejectstatus,
&checkedinfo, stderr, &warns);
assert(checkedinfo->available.valid);
if (strspn(checkedinfo->name,
"abcdefghijklmnopqrstuvwxyz0123456789+-.")
!= strlen(checkedinfo->name))
ohshit(_("package name has characters that aren't lowercase alphanums or `-+.'"));
if (checkedinfo->priority == pri_other) {
warning(_("'%s' contains user-defined Priority value '%s'"),
controlfile, checkedinfo->otherpriority);
warns++;
}
for (field= checkedinfo->available.arbs; field; field= field->next) {
if (known_arbitrary_field(field))
continue;
warning(_("'%s' contains user-defined field '%s'"),
controlfile, field->name);
warns++;
}
checkversion(checkedinfo->available.version.version,
_("(upstream) version"), &errs);
checkversion(checkedinfo->available.version.revision,
_("Debian revision"), &errs);
if (errs) ohshit(_("%d errors in control file"),errs);
if (subdir) {
versionstring= versiondescribe(&checkedinfo->available.version,vdew_never);
arch= checkedinfo->available.architecture; if (!arch) arch= "";
m= m_malloc(sizeof(DEBEXT)+1+strlen(debar)+1+strlen(checkedinfo->name)+
strlen(versionstring)+1+strlen(arch));
sprintf(m,"%s/%s_%s%s%s" DEBEXT,debar,checkedinfo->name,versionstring,
arch[0] ? "_" : "", arch);
debar= m;
}
printf(_("dpkg-deb: building package `%s' in `%s'.\n"), checkedinfo->name, debar);
/* Check file permissions */
strcpy(controlfile, directory);
strcat(controlfile, "/" BUILDCONTROLDIR "/");
if (lstat(controlfile, &mscriptstab))
ohshite(_("unable to stat control directory"));
if (!S_ISDIR(mscriptstab.st_mode))
ohshit(_("control directory is not a directory"));
if ((mscriptstab.st_mode & 07757) != 0755)
ohshit(_("control directory has bad permissions %03lo (must be >=0755 "
"and <=0775)"), (unsigned long)(mscriptstab.st_mode & 07777));
for (mscriptp= maintainerscripts; *mscriptp; mscriptp++) {
strcpy(controlfile, directory);
strcat(controlfile, "/" BUILDCONTROLDIR "/");
strcat(controlfile, *mscriptp);
if (!lstat(controlfile,&mscriptstab)) {
if (S_ISLNK(mscriptstab.st_mode)) continue;
if (!S_ISREG(mscriptstab.st_mode))
ohshit(_("maintainer script `%.50s' is not a plain file or symlink"),*mscriptp);
if ((mscriptstab.st_mode & 07557) != 0555)
ohshit(_("maintainer script `%.50s' has bad permissions %03lo "
"(must be >=0555 and <=0775)"),
*mscriptp, (unsigned long)(mscriptstab.st_mode & 07777));
} else if (errno != ENOENT) {
ohshite(_("maintainer script `%.50s' is not stattable"),*mscriptp);
}
}
/* Check if conffiles contains sane information */
strcpy(controlfile, directory);
strcat(controlfile, "/" BUILDCONTROLDIR "/" CONFFILESFILE);
if ((cf= fopen(controlfile,"r"))) {
while (fgets(conffilename,MAXCONFFILENAME+1,cf)) {
n= strlen(conffilename);
if (!n) ohshite(_("empty string from fgets reading conffiles"));
if (conffilename[n-1] != '\n') {
warning(_("conffile name '%.50s...' is too long, or missing final newline"),
conffilename);
warns++;
while ((c= getc(cf)) != EOF && c != '\n');
continue;
}
conffilename[n - 1] = '\0';
strcpy(controlfile, directory);
strcat(controlfile, "/");
strcat(controlfile, conffilename);
if (lstat(controlfile,&controlstab)) {
if (errno == ENOENT) {
if((n > 1) && isspace(conffilename[n-2]))
warning(_("conffile filename '%s' contains trailing white spaces"),
conffilename);
ohshit(_("conffile `%.250s' does not appear in package"), conffilename);
} else
ohshite(_("conffile `%.250s' is not stattable"), conffilename);
} else if (!S_ISREG(controlstab.st_mode)) {
warning(_("conffile '%s' is not a plain file"), conffilename);
warns++;
}
}
if (ferror(cf)) ohshite(_("error reading conffiles file"));
fclose(cf);
} else if (errno != ENOENT) {
ohshite(_("error opening conffiles file"));
}
if (warns)
warning(_("ignoring %d warnings about the control file(s)\n"), warns);
}
m_output(stdout, _("<standard output>"));
/* Now that we have verified everything its time to actually
* build something. Lets start by making the ar-wrapper.
*/
if (!(ar=fopen(debar,"wb"))) ohshite(_("unable to create `%.255s'"),debar);
if (setvbuf(ar, NULL, _IONBF, 0))
ohshite(_("unable to unbuffer `%.255s'"), debar);
/* Fork a tar to package the control-section of the package */
unsetenv("TAR_OPTIONS");
m_pipe(p1);
if (!(c1= m_fork())) {
m_dup2(p1[1],1); close(p1[0]); close(p1[1]);
if (chdir(directory)) ohshite(_("failed to chdir to `%.255s'"),directory);
if (chdir(BUILDCONTROLDIR)) ohshite(_("failed to chdir to .../DEBIAN"));
execlp(TAR, "tar", "-cf", "-", "--format=gnu", ".", NULL);
ohshite(_("failed to exec tar -cf"));
}
close(p1[1]);
/* Create a temporary file to store the control data in. Immediately unlink
* our temporary file so others can't mess with it.
*/
if ((gzfd= mkstemp(tfbuf)) == -1) ohshite(_("failed to make tmpfile (control)"));
/* make sure it's gone, the fd will remain until we close it */
if (unlink(tfbuf)) ohshit(_("failed to unlink tmpfile (control), %s"),
tfbuf);
/* reset this, so we can use it elsewhere */
strcpy(tfbuf,envbuf);
strcat(tfbuf,"/dpkg.XXXXXX");
/* And run gzip to compress our control archive */
if (!(c2= m_fork())) {
m_dup2(p1[0],0); m_dup2(gzfd,1); close(p1[0]); close(gzfd);
compress_cat(compress_type_gzip, 0, 1, "9", _("control"));
}
close(p1[0]);
waitsubproc(c2,"gzip -9c",0);
waitsubproc(c1,"tar -cf",0);
if (fstat(gzfd,&controlstab)) ohshite(_("failed to fstat tmpfile (control)"));
/* We have our first file for the ar-archive. Write a header for it to the
* package and insert it.
*/
if (oldformatflag) {
if (fprintf(ar, "%-8s\n%ld\n", OLDARCHIVEVERSION, (long)controlstab.st_size) == EOF)
werr(debar);
} else {
thetime = time(NULL);
if (fprintf(ar,
"!<arch>\n"
"debian-binary %-12lu0 0 100644 %-10ld`\n"
ARCHIVEVERSION "\n"
"%s"
ADMINMEMBER "%-12lu0 0 100644 %-10ld`\n",
thetime,
(long)sizeof(ARCHIVEVERSION),
(sizeof(ARCHIVEVERSION)&1) ? "\n" : "",
(unsigned long)thetime,
(long)controlstab.st_size) == EOF)
werr(debar);
}
if (lseek(gzfd,0,SEEK_SET)) ohshite(_("failed to rewind tmpfile (control)"));
fd_fd_copy(gzfd, fileno(ar), -1, _("control"));
/* Control is done, now we need to archive the data. Start by creating
* a new temporary file. Immediately unlink the temporary file so others
* can't mess with it. */
if (!oldformatflag) {
close(gzfd);
if ((gzfd= mkstemp(tfbuf)) == -1) ohshite(_("failed to make tmpfile (data)"));
/* make sure it's gone, the fd will remain until we close it */
if (unlink(tfbuf)) ohshit(_("failed to unlink tmpfile (data), %s"),
tfbuf);
/* reset these, in case we want to use the later */
strcpy(tfbuf,envbuf);
strcat(tfbuf,"/dpkg.XXXXXX");
}
/* Fork off a tar. We will feed it a list of filenames on stdin later.
*/
m_pipe(p1);
m_pipe(p2);
if (!(c1= m_fork())) {
m_dup2(p1[0],0); close(p1[0]); close(p1[1]);
m_dup2(p2[1],1); close(p2[0]); close(p2[1]);
if (chdir(directory)) ohshite(_("failed to chdir to `%.255s'"),directory);
execlp(TAR, "tar", "-cf", "-", "--format=gnu", "--null", "-T", "-", "--no-recursion", NULL);
ohshite(_("failed to exec tar -cf"));
}
close(p1[0]);
close(p2[1]);
/* Of course we should not forget to compress the archive as well.. */
if (!(c2= m_fork())) {
close(p1[1]);
m_dup2(p2[0],0); close(p2[0]);
m_dup2(oldformatflag ? fileno(ar) : gzfd,1);
compress_cat(compress_type, 0, 1, compression, _("data"));
}
close(p2[0]);
/* All the pipes are set, now lets run find, and start feeding
* filenames to tar.
*/
m_pipe(p3);
if (!(c3= m_fork())) {
m_dup2(p3[1],1); close(p3[0]); close(p3[1]);
if (chdir(directory)) ohshite(_("failed to chdir to `%.255s'"),directory);
execlp(FIND, "find", ".", "-path", "./" BUILDCONTROLDIR, "-prune", "-o",
"-print0", NULL);
ohshite(_("failed to exec find"));
}
close(p3[1]);
/* We need to reorder the files so we can make sure that symlinks
* will not appear before their target.
*/
while ((fi=getfi(directory, p3[0]))!=NULL)
if (S_ISLNK(fi->st.st_mode))
add_to_filist(fi,&symlist,&symlist_end);
else {
if (write(p1[1], fi->fn, strlen(fi->fn)+1) ==- 1)
ohshite(_("failed to write filename to tar pipe (data)"));
}
close(p3[0]);
waitsubproc(c3,"find",0);
for (fi= symlist;fi;fi= fi->next)
if (write(p1[1], fi->fn, strlen(fi->fn)+1) == -1)
ohshite(_("failed to write filename to tar pipe (data)"));
/* All done, clean up wait for tar and gzip to finish their job */
close(p1[1]);
free_filist(symlist);
waitsubproc(c2, _("<compress> from tar -cf"), 0);
waitsubproc(c1,"tar -cf",0);
/* Okay, we have data.tar.gz as well now, add it to the ar wrapper */
if (!oldformatflag) {
const char *datamember;
switch (compress_type) {
case compress_type_gzip:
datamember = DATAMEMBER_GZ;
break;
case compress_type_bzip2:
datamember = DATAMEMBER_BZ2;
break;
case compress_type_lzma:
datamember = DATAMEMBER_LZMA;
break;
case compress_type_cat:
datamember = DATAMEMBER_CAT;
break;
default:
internerr("unkown compress_type '%i'", compress_type);
}
if (fstat(gzfd, &datastab))
ohshite(_("failed to fstat tmpfile (data)"));
if (fprintf(ar,
"%s"
"%s" "%-12lu0 0 100644 %-10ld`\n",
(controlstab.st_size & 1) ? "\n" : "",
datamember,
(unsigned long)thetime,
(long)datastab.st_size) == EOF)
werr(debar);
if (lseek(gzfd,0,SEEK_SET)) ohshite(_("failed to rewind tmpfile (data)"));
fd_fd_copy(gzfd, fileno(ar), -1, _("cat (data)"));
if (datastab.st_size & 1)
if (putc('\n',ar) == EOF)
werr(debar);
}
if (fclose(ar)) werr(debar);
exit(0);
}
|