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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "pool.h"
#include "repo.h"
#include "chksum.h"
#include "solv_xfopen.h"
#include "repoinfo.h"
#include "mirror.h"
#include "checksig.h"
#include "repoinfo_download.h"
static inline int
opentmpfile()
{
char tmpl[100];
int fd;
strcpy(tmpl, "/var/tmp/solvXXXXXX");
fd = mkstemp(tmpl);
if (fd < 0)
{
perror("mkstemp");
exit(1);
}
unlink(tmpl);
return fd;
}
int
verify_checksum(int fd, const char *file, const unsigned char *chksum, Id chksumtype)
{
char buf[1024];
const unsigned char *sum;
Chksum *h;
int l;
h = solv_chksum_create(chksumtype);
if (!h)
{
printf("%s: unknown checksum type\n", file);
return 0;
}
while ((l = read(fd, buf, sizeof(buf))) > 0)
solv_chksum_add(h, buf, l);
lseek(fd, 0, SEEK_SET);
l = 0;
sum = solv_chksum_get(h, &l);
if (memcmp(sum, chksum, l))
{
printf("%s: checksum mismatch\n", file);
solv_chksum_free(h, 0);
return 0;
}
solv_chksum_free(h, 0);
return 1;
}
FILE *
curlfopen(struct repoinfo *cinfo, const char *file, int uncompress, const unsigned char *chksum, Id chksumtype, int markincomplete)
{
FILE *fp;
pid_t pid;
int fd;
int status;
char url[4096];
const char *baseurl = cinfo->baseurl;
if (!baseurl)
{
if (!cinfo->metalink && !cinfo->mirrorlist)
return 0;
if (file != cinfo->metalink && file != cinfo->mirrorlist)
{
unsigned char mlchksum[32];
Id mlchksumtype = 0;
fp = curlfopen(cinfo, cinfo->metalink ? cinfo->metalink : cinfo->mirrorlist, 0, 0, 0, 0);
if (!fp)
return 0;
if (cinfo->metalink)
cinfo->baseurl = findmetalinkurl(fp, mlchksum, &mlchksumtype);
else
cinfo->baseurl = findmirrorlisturl(fp);
fclose(fp);
if (!cinfo->baseurl)
return 0;
#ifdef FEDORA
if (strchr(cinfo->baseurl, '$'))
{
char *b = yum_substitute(cinfo->repo->pool, cinfo->baseurl);
free(cinfo->baseurl);
cinfo->baseurl = strdup(b);
}
#endif
if (!chksumtype && mlchksumtype && !strcmp(file, "repodata/repomd.xml"))
{
chksumtype = mlchksumtype;
chksum = mlchksum;
}
return curlfopen(cinfo, file, uncompress, chksum, chksumtype, markincomplete);
}
snprintf(url, sizeof(url), "%s", file);
}
else
{
const char *path = cinfo->path && strcmp(cinfo->path, "/") != 0 ? cinfo->path : "";
int l = strlen(baseurl);
int pl = strlen(path);
const char *sep = l && baseurl[l - 1] == '/' ? "" : "/";
const char *psep = pl && cinfo->path[pl - 1] == '/' ? "" : "/";
snprintf(url, sizeof(url), "%s%s%s%s%s", baseurl, sep, path, psep, file);
}
fd = opentmpfile();
// printf("url: %s\n", url);
if ((pid = fork()) == (pid_t)-1)
{
perror("fork");
exit(1);
}
if (pid == 0)
{
if (fd != 1)
{
dup2(fd, 1);
close(fd);
}
execlp("curl", "curl", "-f", "-s", "-L", url, (char *)0);
perror("curl");
_exit(0);
}
status = 0;
while (waitpid(pid, &status, 0) != pid)
;
if (lseek(fd, 0, SEEK_END) == 0 && (!status || !chksumtype))
{
/* empty file */
close(fd);
return 0;
}
lseek(fd, 0, SEEK_SET);
if (status)
{
printf("%s: download error %d\n", file, status >> 8 ? status >> 8 : status);
if (markincomplete)
cinfo->incomplete = 1;
close(fd);
return 0;
}
if (chksumtype && !verify_checksum(fd, file, chksum, chksumtype))
{
if (markincomplete)
cinfo->incomplete = 1;
close(fd);
return 0;
}
fcntl(fd, F_SETFD, FD_CLOEXEC);
if (uncompress)
{
if (solv_xfopen_iscompressed(file) < 0)
{
printf("%s: unsupported compression\n", file);
if (markincomplete)
cinfo->incomplete = 1;
close(fd);
return 0;
}
fp = solv_xfopen_fd(file, fd, "r");
}
else
fp = fdopen(fd, "r");
if (!fp)
close(fd);
return fp;
}
FILE *
downloadpackage(Solvable *s, const char *loc)
{
const unsigned char *chksum;
Id chksumtype;
struct repoinfo *cinfo = s->repo->appdata;
#ifdef ENABLE_SUSEREPO
if (cinfo->type == TYPE_SUSETAGS)
{
const char *datadir = repo_lookup_str(cinfo->repo, SOLVID_META, SUSETAGS_DATADIR);
loc = pool_tmpjoin(s->repo->pool, datadir ? datadir : "suse", "/", loc);
}
#endif
chksumtype = 0;
chksum = solvable_lookup_bin_checksum(s, SOLVABLE_CHECKSUM, &chksumtype);
return curlfopen(cinfo, loc, 0, chksum, chksumtype, 0);
}
int
downloadchecksig(struct repoinfo *cinfo, FILE *fp, const char *sigurl, Pool **sigpool)
{
FILE *sigfp;
sigfp = curlfopen(cinfo, sigurl, 0, 0, 0, 0);
if (!sigfp)
{
printf(" unsigned, skipped\n");
return 0;
}
if (!*sigpool)
*sigpool = read_sigs();
if (!checksig(*sigpool, fp, sigfp))
{
printf(" checksig failed, skipped\n");
fclose(sigfp);
return 0;
}
fclose(sigfp);
return 1;
}
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