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qmerge.c
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qmerge.c
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/*
* Copyright 2005-2019 Gentoo Authors
* Distributed under the terms of the GNU General Public License v2
*
* Copyright 2005-2010 Ned Ludd - <[email protected]>
* Copyright 2005-2014 Mike Frysinger - <[email protected]>
* Copyright 2018- Fabian Groffen - <[email protected]>
*/
#include "main.h"
#include "applets.h"
#include <stdio.h>
#include <xalloc.h>
#include <fnmatch.h>
#include <dirent.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <assert.h>
#include "stat-time.h"
#include "atom.h"
#include "copy_file.h"
#include "contents.h"
#include "eat_file.h"
#include "human_readable.h"
#include "md5_sha1_sum.h"
#include "profile.h"
#include "rmspace.h"
#include "scandirat.h"
#include "set.h"
#include "tree.h"
#include "xasprintf.h"
#include "xchdir.h"
#include "xmkdir.h"
#include "xsystem.h"
#ifndef GLOB_BRACE
# define GLOB_BRACE (1 << 10) /* Expand "{a,b}" to "a" "b". */
#endif
/*
--nofiles don't verify files in package
--noscript don't execute pkg_{pre,post}{inst,rm} (if any)
*/
/* #define BUSYBOX "/bin/busybox" */
#define BUSYBOX ""
int old_repo = 0;
#define QMERGE_FLAGS "fFsKUpuyO" COMMON_FLAGS
static struct option const qmerge_long_opts[] = {
{"fetch", no_argument, NULL, 'f'},
{"force", no_argument, NULL, 'F'},
{"search", no_argument, NULL, 's'},
{"install", no_argument, NULL, 'K'},
{"unmerge", no_argument, NULL, 'U'},
{"pretend", no_argument, NULL, 'p'},
{"update", no_argument, NULL, 'u'},
{"yes", no_argument, NULL, 'y'},
{"nodeps", no_argument, NULL, 'O'},
{"debug", no_argument, NULL, 128},
COMMON_LONG_OPTS
};
static const char * const qmerge_opts_help[] = {
"Fetch package and newest Packages metadata",
"Fetch package (skipping Packages)",
"Search available packages",
"Install package",
"Uninstall package",
"Pretend only",
"Update only",
"Don't prompt before overwriting",
"Don't merge dependencies",
"Run shell funcs with `set -x`",
COMMON_OPTS_HELP
};
#define qmerge_usage(ret) usage(ret, QMERGE_FLAGS, qmerge_long_opts, qmerge_opts_help, NULL, lookup_applet_idx("qmerge"))
char search_pkgs = 0;
char interactive = 1;
char install = 0;
char uninstall = 0;
char force_download = 0;
char follow_rdepends = 1;
char qmerge_strict = 0;
char update_only = 0;
bool debug = false;
const char Packages[] = "Packages";
/*
"CHOST", "DEPEND", "DESCRIPTION", "EAPI",
"IUSE", "KEYWORDS", "LICENSE", "PDEPEND",
"PROVIDE", "RDEPEND", "SLOT", "USE"
*/
struct pkg_t {
char PF[64];
char CATEGORY[64];
char DESC[126];
char LICENSE[64];
char RDEPEND[BUFSIZ];
char MD5[34];
char SHA1[42];
char SLOT[64];
size_t SIZE;
char USE[BUFSIZ];
char REPO[64];
};
struct llist_char_t {
char *data;
struct llist_char_t *next;
};
typedef struct llist_char_t llist_char;
static void pkg_fetch(int, const depend_atom *, const struct pkg_t *);
static void pkg_merge(int, const depend_atom *, const struct pkg_t *);
static int pkg_unmerge(tree_pkg_ctx *, set *, int, char **, int, char **);
static struct pkg_t *grab_binpkg_info(const char *);
static char *find_binpkg(const char *);
static bool
prompt(const char *p)
{
printf("%s? [Y/n] ", p);
fflush(stdout);
switch (getc(stdin)) {
case '\n':
case 'y':
case 'Y':
return true;
default:
return false;
}
}
static int run_applet_l(const char *arg, ...)
{
int (*applet)(int, char **);
va_list ap;
int ret, optind_saved, argc;
char **argv;
const char *argv0_saved;
optind_saved = optind;
argv0_saved = argv0;
applet = lookup_applet(arg);
if (!applet)
return -1;
/* This doesn't NULL terminate argv, but you should be using argc */
va_start(ap, arg);
argc = 0;
argv = NULL;
while (arg) {
argv = xrealloc(argv, sizeof(*argv) * ++argc);
argv[argc - 1] = xstrdup(arg);
arg = va_arg(ap, const char *);
}
va_end(ap);
optind = 0;
argv0 = argv[0];
ret = applet(argc, argv);
while (argc--)
free(argv[argc]);
free(argv);
optind = optind_saved;
argv0 = argv0_saved;
return ret;
}
static void
fetch(const char *destdir, const char *src)
{
if (!binhost[0])
return;
fflush(stdout);
fflush(stderr);
#if 0
if (getenv("FETCHCOMMAND") != NULL) {
char buf[BUFSIZ];
snprintf(buf, sizeof(buf), "(export DISTDIR='%s' URI='%s/%s'; %s)",
destdir, binhost, src, getenv("FETCHCOMMAND"));
xsystem(buf);
} else
#endif
{
pid_t p;
int status;
char *path;
xasprintf(&path, "%s/%s", binhost, src);
char prog[] = "wget";
char argv_c[] = "-c";
char argv_P[] = "-P";
char argv_q[] = "-q";
char *argv_dir = xstrdup(destdir);
char *argv[] = {
prog,
argv_c,
argv_P,
argv_dir,
path,
quiet ? argv_q : NULL,
NULL,
};
if (!(force_download || install) && pretend)
strcpy(prog, "echo");
p = vfork();
switch (p) {
case 0:
_exit(execvp(prog, argv));
case -1:
errp("vfork failed");
}
free(path);
free(argv_dir);
waitpid(p, &status, 0);
#if 0
if (WIFEXITED(status) && WEXITSTATUS(status) == 0)
return;
#endif
}
fflush(stdout);
fflush(stderr);
}
static void
qmerge_initialize(void)
{
char *buf;
if (strlen(BUSYBOX))
if (access(BUSYBOX, X_OK) != 0)
err(BUSYBOX " must be installed");
if (access("/bin/sh", X_OK) != 0)
err("/bin/sh must be installed");
if (pkgdir[0] != '/')
errf("PKGDIR='%s' does not appear to be valid", pkgdir);
if (!search_pkgs && !pretend) {
if (mkdir_p(pkgdir, 0755))
errp("could not setup PKGDIR: %s", pkgdir);
}
xasprintf(&buf, "%s/portage/", port_tmpdir);
mkdir_p(buf, 0755);
xchdir(buf);
if (force_download == 1 /* -f: fetch */) {
unlink(Packages);
fetch(buf, Packages);
}
free(buf);
}
struct qmerge_bv_state {
const char *catname;
const char *pkgname;
const char *slot;
char buf[4096];
char *retbuf;
};
static int
qmerge_filter_cat(tree_cat_ctx *cat_ctx, void *priv)
{
struct qmerge_bv_state *state = priv;
return !state->catname || strcmp(cat_ctx->name, state->catname) == 0;
}
/* HACK: pull this in, knowing that qlist will be in the final link, we
* should however figure out how to do what match does here from e.g.
* atom */
extern bool qlist_match(
tree_pkg_ctx *pkg_ctx,
const char *name,
depend_atom **name_atom,
bool exact);
static int
qmerge_best_version_cb(tree_pkg_ctx *pkg_ctx, void *priv)
{
struct qmerge_bv_state *state = priv;
if (qlist_match(pkg_ctx, state->buf, NULL, true))
snprintf(state->retbuf, sizeof(state->buf), "%s/%s:%s",
pkg_ctx->cat_ctx->name, pkg_ctx->name, state->slot);
return 0;
}
static char *
best_version(const char *catname, const char *pkgname, const char *slot)
{
static int vdb_check = 1;
static char retbuf[4096];
tree_ctx *vdb;
struct qmerge_bv_state state = {
.catname = catname,
.pkgname = pkgname,
.slot = slot,
.retbuf = retbuf,
};
/* Make sure these dirs exist before we try walking them */
switch (vdb_check) {
case 1: {
int fd = open(portroot, O_RDONLY|O_CLOEXEC|O_PATH);
if (fd >= 0) {
/* skip leading slash */
vdb_check = faccessat(fd, portvdb + 1, X_OK, 0);
close(fd);
} else
vdb_check = -1;
}
if (vdb_check)
case -1:
goto done;
}
retbuf[0] = '\0';
snprintf(state.buf, sizeof(state.buf), "%s%s%s:%s",
catname ? : "", catname ? "/" : "", pkgname, slot);
vdb = tree_open_vdb(portroot, portvdb);
if (vdb != NULL) {
tree_foreach_pkg_fast(vdb,
qmerge_best_version_cb, &state, qmerge_filter_cat);
tree_close(vdb);
}
done:
return retbuf;
}
static int
config_protected(const char *buf, int cp_argc, char **cp_argv,
int cpm_argc, char **cpm_argv)
{
int i;
/* Check CONFIG_PROTECT_MASK */
for (i = 1; i < cpm_argc; ++i)
if (strncmp(cpm_argv[i], buf, strlen(cpm_argv[i])) == 0)
return 0;
/* Check CONFIG_PROTECT */
for (i = 1; i < cp_argc; ++i)
if (strncmp(cp_argv[i], buf, strlen(cp_argv[i])) == 0)
return 1;
/* this would probably be bad */
if (strcmp(CONFIG_EPREFIX "bin/sh", buf) == 0)
return 1;
return 0;
}
static void
crossmount_rm(const char *fname, const struct stat * const st,
int fd, char *qpth)
{
struct stat lst;
if (fstatat(fd, fname, &lst, AT_SYMLINK_NOFOLLOW) == -1)
return;
if (lst.st_dev != st->st_dev) {
warn("skipping crossmount install masking: %s", fname);
return;
}
qprintf("%s<<<%s %s/%s (INSTALL_MASK)\n", YELLOW, NORM, qpth, fname);
rm_rf_at(fd, fname);
}
static int
q_merge_filter_self_parent(const struct dirent *de)
{
if (de->d_name[0] == '.' && (de->d_name[1] == '\0' ||
(de->d_name[1] == '.' && de->d_name[2] == '\0')))
return 0;
return 1;
}
enum inc_exc { INCLUDE = 1, EXCLUDE = 2 };
static void
install_mask_check_dir(
char ***maskv,
int maskc,
const struct stat * const st,
int fd,
ssize_t level,
enum inc_exc parent_mode,
char *qpth)
{
struct dirent **files;
int cnt;
int i;
int j;
enum inc_exc mode;
enum inc_exc child_mode;
#ifndef DT_DIR
struct stat s;
#endif
char *npth = qpth + strlen(qpth);
cnt = scandirat(fd, ".", &files, q_merge_filter_self_parent, alphasort);
for (j = 0; j < cnt; j++) {
mode = child_mode = parent_mode;
for (i = 0; i < maskc; i++) {
if ((ssize_t)maskv[i][0] < 0) {
/* relative matches need to be a "file", as the Portage
* implementation suggests, so that's easy for us here,
* since we can just match it against each component in
* the path */
if ((ssize_t)maskv[i][0] < -1)
continue; /* this is unsupported, so skip it */
/* this also works if maskv happens to be a glob */
if (fnmatch(maskv[i][1], files[j]->d_name, FNM_PERIOD) != 0)
continue;
mode = child_mode = maskv[i][2] ? INCLUDE : EXCLUDE;
} else if ((ssize_t)maskv[i][0] < level) {
/* either this is a mask that didn't match, or it
* matched, but a negative match exists for a deeper
* level, parent_mode should reflect this */
continue;
} else {
if (fnmatch(maskv[i][level], files[j]->d_name, FNM_PERIOD) != 0)
continue;
if ((ssize_t)maskv[i][0] == level) /* full mask match */
mode = child_mode =
(ssize_t)maskv[i][level + 1] ? INCLUDE : EXCLUDE;
else if (maskv[i][(ssize_t)maskv[i][0] + 1])
/* partial include mask */
mode = INCLUDE;
}
}
DBG("%s/%s: %s/%s", qpth, files[j]->d_name,
mode == EXCLUDE ? "EXCLUDE" : "INCLUDE",
child_mode == EXCLUDE ? "EXCLUDE" : "INCLUDE");
if (mode == EXCLUDE) {
crossmount_rm(files[j]->d_name, st, fd, qpth);
continue;
}
#ifdef DT_DIR
if (files[j]->d_type == DT_DIR) {
#else
if (fstatat(fd, files[j]->d_name, &s, AT_SYMLINK_NOFOLLOW) != 0)
continue;
if (S_ISDIR(s.st_mode)) {
#endif
int subfd = openat(fd, files[j]->d_name, O_RDONLY);
if (subfd < 0)
continue;
snprintf(npth, _Q_PATH_MAX - (npth - qpth),
"/%s", files[j]->d_name);
install_mask_check_dir(maskv, maskc, st, subfd,
level + 1, child_mode, qpth);
close(subfd);
*npth = '\0';
}
}
}
static void
install_mask_pwd(int iargc, char **iargv, const struct stat * const st, int fd)
{
char *p;
int i;
size_t cnt;
size_t maxdirs;
char **masks;
size_t masksc;
char ***masksv;
char qpth[_Q_PATH_MAX];
/* we have to deal with "negative" masks, see
* https://archives.gentoo.org/gentoo-portage-dev/message/29e128a9f41122fa0420c1140f7b7f94
* which means we'll need to see what thing matches last
* (inclusion or exclusion) for *every* file :( */
/*
example package contents:
/e/t1
/u/b/t1
/u/b/t2
/u/l/lt1
/u/s/d/t1
/u/s/m/m1/t1
/u/s/m/m5/t2
masking rules: array encoding:
/u/s 2 u s 0 relative=0 include=0
-/u/s/m/m1 4 u s m m1 1 relative=0 include=1
e -1 e 0 relative=1 include=0
should result in:
/u/b/t1
/u/b/t2
/u/l/lt1
/u/s/m/m1/t1
strategy:
- for each dir level
- find if there is a match on that level in rules
- if the last match is the full mask
- if the mask is negated, do not remove entry
- else, remove entry
- if the last match is negated, partial and a full mask matched before
- do not remove entry
practice:
/e | matches "e" -> remove
/u | matches partial last negated -> continue
/b | doesn't match -> leave subtree
/l | doesn't match -> leave subtree
/s | match, partial last negated match -> remember match, continue
/d | doesn't match -> remembered match, remove subtree
/m | partial match negated -> continue
/m1 | match negated -> leave subtree
/m5 | doesn't match -> remembered match, remove subtree
*/
/* find the longest path so we can allocate a matrix */
maxdirs = 0;
for (i = 1; i < iargc; i++) {
char lastc = '/';
cnt = 1; /* we always have "something", right? */
p = iargv[i];
if (*p == '-')
p++;
for (; *p != '\0'; p++) {
/* eliminate duplicate /-es, also ignore the leading / in
* the count */
if (*p == '/' && *p != lastc)
cnt++;
lastc = *p;
}
if (cnt > maxdirs)
maxdirs = cnt;
}
maxdirs += 2; /* allocate plus relative and include elements */
/* allocate and populate matrix */
masksc = iargc - 1;
masks = xmalloc(sizeof(char *) * (maxdirs * masksc));
masksv = xmalloc(sizeof(char **) * (masksc));
for (i = 1; i < iargc; i++) {
masksv[i - 1] = &masks[(i - 1) * maxdirs];
p = iargv[i];
cnt = 1; /* start after count */
/* ignore include marker */
if (*p == '-')
p++;
/* strip of leading slash(es) */
while (*p == '/')
p++;
masks[((i - 1) * maxdirs) + cnt] = p;
for (; *p != '\0'; p++) {
if (*p == '/') {
/* fold duplicate slashes */
do {
*p++ = '\0';
} while (*p == '/');
cnt++;
masks[((i - 1) * maxdirs) + cnt] = p;
}
}
/* brute force cast below values, a pointer basically is size_t,
* which is large enough to store what we need here */
p = iargv[i];
/* set include bit */
if (*p == '-') {
masks[((i - 1) * maxdirs) + cnt + 1] = (char *)1;
p++;
} else {
masks[((i - 1) * maxdirs) + cnt + 1] = (char *)0;
}
/* set count */
masks[((i - 1) * maxdirs) + 0] =
(char *)((*p == '/' ? 1 : -1) * cnt);
}
#if EBUG
printf("applying install masks:\n");
for (cnt = 0; cnt < masksc; cnt++) {
ssize_t plen = (ssize_t)masksv[cnt][0];
printf("%3zd ", plen);
if (plen < 0)
plen = -plen;
for (i = 1; i <= plen; i++)
printf("%s ", masksv[cnt][i]);
printf(" %zd\n", (size_t)masksv[cnt][i]);
}
#endif
cnt = snprintf(qpth, _Q_PATH_MAX, "%s", CONFIG_EPREFIX);
cnt--;
if (qpth[cnt] == '/')
qpth[cnt] = '\0';
install_mask_check_dir(masksv, masksc, st, fd, 1, INCLUDE, qpth);
}
static char
qprint_tree_node(int level, const depend_atom *atom, const struct pkg_t *pkg)
{
char buf[1024];
char *p;
int i, ret;
char install_ver[126] = "";
char c = 'N';
const char *color;
if (!pretend)
return 0;
p = best_version(pkg->CATEGORY, atom->PN, pkg->SLOT);
if (strlen(p) < 1) {
c = 'N';
snprintf(buf, sizeof(buf), "%sN%s", GREEN, NORM);
} else {
depend_atom *subatom = atom_explode(p);
if (subatom != NULL) {
ret = atom_compare(atom, subatom);
switch (ret) {
case EQUAL: c = 'R'; break;
case NEWER: c = 'U'; break;
case OLDER: c = 'D'; break;
default: c = '?'; break;
}
snprintf(install_ver, sizeof(install_ver), "[%s%.*s%s] ",
DKBLUE,
(int)(sizeof(install_ver) - 4 -
sizeof(DKBLUE) - sizeof(NORM)),
subatom->P, NORM);
atom_implode(subatom);
}
if (update_only && c != 'U')
return c;
if ((c == 'R' || c == 'D') && update_only && level)
return c;
switch (c) {
case 'R': color = YELLOW; break;
case 'U': color = BLUE; break;
case 'D': color = DKBLUE; break;
default: color = RED; break;
}
snprintf(buf, sizeof(buf), "%s%c%s", color, c, NORM);
#if 0
if (level) {
switch (c) {
case 'N':
case 'U': break;
default:
qprintf("[%c] %d %s\n", c, level, pkg->PF); return;
break;
}
}
#endif
}
printf("[%s] ", buf);
for (i = 0; i < level; ++i)
putchar(' ');
if (verbose)
printf("%s%s/%s%s %s%s%s%s%s%s\n", DKGREEN, pkg->CATEGORY, pkg->PF, NORM,
install_ver, strlen(pkg->USE) > 0 ? "(" : "", RED, pkg->USE, NORM, strlen(pkg->USE) > 0 ? ")" : "");
else
printf("%s%s/%s%s\n", DKGREEN, pkg->CATEGORY, pkg->PF, NORM);
return c;
}
static void
pkg_run_func_at(int dirfd, const char *vdb_path, const char *phases, const char *func, const char *D, const char *T)
{
const char *phase;
char *script;
/* This assumes no func is a substring of another func.
* Today, that assumption is valid for all funcs ...
* The phases are the func with the "pkg_" chopped off. */
phase = func + 4;
if (strstr(phases, phase) == NULL) {
qprintf("--- %s\n", func);
return;
}
qprintf(">>> %s\n", func);
xasprintf(&script,
/* Provide funcs required by the PMS */
"EBUILD_PHASE=%3$s\n"
"debug-print() { :; }\n"
"debug-print-function() { :; }\n"
"debug-print-section() { :; }\n"
/* Not quite right */
"has_version() { [ -n \"$(qlist -ICqe \"$1\")\" ]; }\n"
/* best_version() */
"use() { useq \"$@\"; }\n"
"usex() { useq \"$1\" && echo \"${2-yes}$4\" || echo \"${3-no}$5\"; }\n"
"useq() { hasq \"$1\" ${USE}; }\n"
"usev() { hasv \"$1\" ${USE}; }\n"
"has() { hasq \"$@\"; }\n"
"hasq() { local h=$1; shift; case \" $* \" in *\" $h \"*) return 0;; *) return 1;; esac; }\n"
"hasv() { hasq \"$@\" && echo \"$1\"; }\n"
"elog() { printf ' * %%b\\n' \"$*\"; }\n"
"einfo() { elog \"$@\"; }\n"
"ewarn() { elog \"$@\"; }\n"
"eqawarn() { elog \"QA: \"\"$@\"; }\n"
"eerror() { elog \"$@\"; }\n"
"die() { eerror \"$@\"; exit 1; }\n"
/* TODO: This should suppress `die` */
"nonfatal() { \"$@\"; }\n"
"ebegin() { printf ' * %%b ...' \"$*\"; }\n"
"eend() { local r=${1:-$?}; [ $# -gt 0 ] && shift; [ $r -eq 0 ] && echo ' [ ok ]' || echo \" $* \"'[ !! ]'; return $r; }\n"
"dodir() { mkdir -p \"$@\"; }\n"
"keepdir() { dodir \"$@\" && touch \"$@\"/.keep_${CATEGORY}_${PN}-${SLOT%%/*}; }\n"
/* TODO: This should be fatal upon error */
"emake() { ${MAKE:-make} ${MAKEOPTS} \"$@\"; }\n"
/* Unpack the env if need be */
"[ -e '%1$s/environment' ] || { bzip2 -dc '%1$s/environment.bz2' > '%1$s/environment' || exit 1; }\n"
/* Load the main env */
". '%1$s/environment'\n"
/* Reload env vars that matter to us */
"FILESDIR=/.does/not/exist/anywhere\n"
"MERGE_TYPE=binary\n"
"ROOT='%4$s'\n"
"EROOT=\"/${ROOT#/}/${EPREFIX%%/}/\"\n"
"D=\"%5$s\"\n"
"ED=\"${D%%/}/${EPREFIX%%/}/\"\n"
"T=\"%6$s\"\n"
/* Finally run the func */
"%7$s%2$s\n"
/* Ignore func return values (not exit values) */
":",
/*1*/ vdb_path,
/*2*/ func,
/*3*/ phase,
/*4*/ portroot,
/*5*/ D,
/*6*/ T,
/*7*/ debug ? "set -x;" : "");
xsystembash(script, dirfd);
free(script);
}
#define pkg_run_func(...) pkg_run_func_at(AT_FDCWD, __VA_ARGS__)
/* Copy one tree (the single package) to another tree (ROOT) */
static int
merge_tree_at(int fd_src, const char *src, int fd_dst, const char *dst,
FILE *contents, size_t eprefix_len, set **objs, char **cpathp,
int cp_argc, char **cp_argv, int cpm_argc, char **cpm_argv)
{
int i, ret, subfd_src, subfd_dst;
DIR *dir;
struct dirent *de;
struct stat st;
char *cpath;
size_t clen, nlen, mnlen;
ret = -1;
/* Get handles to these subdirs */
/* Cannot use O_PATH as we want to use fdopendir() */
subfd_src = openat(fd_src, src, O_RDONLY|O_CLOEXEC);
if (subfd_src < 0)
return ret;
subfd_dst = openat(fd_dst, dst, O_RDONLY|O_CLOEXEC|O_PATH);
if (subfd_dst < 0) {
close(subfd_src);
return ret;
}
dir = fdopendir(subfd_src);
if (!dir)
goto done;
cpath = *cpathp;
clen = strlen(cpath);
cpath[clen] = '/';
nlen = mnlen = 0;
while ((de = readdir(dir)) != NULL) {
const char *name = de->d_name;
if (!strcmp(name, ".") || !strcmp(name, ".."))
continue;
/* Build up the full path for this entry */
nlen = strlen(name);
if (mnlen < nlen) {
cpath = *cpathp = xrealloc(*cpathp, clen + 1 + nlen + 1);
mnlen = nlen;
}
strcpy(cpath + clen + 1, name);
/* Find out what the source path is */
if (fstatat(subfd_src, name, &st, AT_SYMLINK_NOFOLLOW)) {
warnp("could not read %s", cpath);
continue;
}
/* Migrate a directory */
if (S_ISDIR(st.st_mode)) {
if (!pretend && mkdirat(subfd_dst, name, st.st_mode)) {
if (errno != EEXIST) {
warnp("could not create %s", cpath);
continue;
}
/* XXX: update times of dir ? */
}
/* syntax: dir dirname */
if (!pretend)
fprintf(contents, "dir %s\n", cpath);
*objs = add_set(cpath, *objs);
qprintf("%s>>>%s %s%s%s/\n", GREEN, NORM, DKBLUE, cpath, NORM);
/* Copy all of these contents */
merge_tree_at(subfd_src, name,
subfd_dst, name, contents, eprefix_len,
objs, cpathp, cp_argc, cp_argv, cpm_argc, cpm_argv);
cpath = *cpathp;
mnlen = 0;
/* In case we didn't install anything, prune the empty dir */
if (!pretend)
unlinkat(subfd_dst, name, AT_REMOVEDIR);
} else if (S_ISREG(st.st_mode)) {
/* Migrate a file */
struct timespec times[2];
int fd_srcf, fd_dstf;
unsigned char *hash;
const char *tmpname, *dname;
char buf[_Q_PATH_MAX * 2];
struct stat ignore;
/* syntax: obj filename hash mtime */
hash = hash_file_at(subfd_src, name, HASH_MD5);
if (!pretend)
fprintf(contents, "obj %s %s %zu""\n",
cpath, hash, (size_t)st.st_mtime);
free(hash);
/* Check CONFIG_PROTECT */
if (config_protected(cpath + eprefix_len,
cp_argc, cp_argv, cpm_argc, cpm_argv) &&
fstatat(subfd_dst, name, &ignore, AT_SYMLINK_NOFOLLOW) == 0)
{
/* ._cfg####_ */
char *num;
dname = buf;
snprintf(buf, sizeof(buf), "._cfg####_%s", name);
num = buf + 5;
for (i = 0; i < 10000; ++i) {
sprintf(num, "%04i", i);
num[4] = '_';
if (fstatat(subfd_dst, dname, &ignore, AT_SYMLINK_NOFOLLOW))
break;
}
qprintf("%s>>>%s %s (%s)\n", GREEN, NORM, cpath, dname);
} else {
dname = name;
qprintf("%s>>>%s %s\n", GREEN, NORM, cpath);
}
*objs = add_set(cpath, *objs);
if (pretend)
continue;
/* First try fast path -- src/dst are same device */
if (renameat(subfd_src, dname, subfd_dst, name) == 0)
continue;
/* Fall back to slow path -- manual read/write */
fd_srcf = openat(subfd_src, name, O_RDONLY|O_CLOEXEC);
if (fd_srcf < 0) {
warnp("could not read %s", cpath);
continue;
}
/* Do not write the file in place ...
* will fail with files that are in use.
* XXX: Should we make this random ?
*/
tmpname = ".qmerge.update";
fd_dstf = openat(subfd_dst, tmpname,
O_WRONLY|O_CLOEXEC|O_CREAT|O_TRUNC, st.st_mode);
if (fd_dstf < 0) {
warnp("could not write %s", cpath);
close(fd_srcf);
continue;
}
/* Make sure owner/mode is sane before we write out data */
if (fchown(fd_dstf, st.st_uid, st.st_gid)) {
warnp("could not set ownership %s", cpath);
continue;
}
if (fchmod(fd_dstf, st.st_mode)) {
warnp("could not set permission %s", cpath);
continue;
}
/* Do the actual data copy */
if (copy_file_fd(fd_srcf, fd_dstf)) {
warnp("could not write %s", cpath);
if (ftruncate(fd_dstf, 0)) {
/* don't care */;
}
close(fd_srcf);
close(fd_dstf);
continue;
}
/* Preserve the file times */
times[0] = get_stat_mtime(&st);
times[1] = get_stat_mtime(&st);
futimens(fd_dstf, times);
close(fd_srcf);
close(fd_dstf);
/* Move the new tmp dst file to the right place */
if (renameat(subfd_dst, tmpname, subfd_dst, dname)) {
warnp("could not rename %s to %s", tmpname, cpath);
continue;
}
} else if (S_ISLNK(st.st_mode)) {
/* Migrate a symlink */
size_t len = st.st_size;
char sym[_Q_PATH_MAX];
/* Find out what we're pointing to */
if (readlinkat(subfd_src, name, sym, sizeof(sym)) == -1) {
warnp("could not read link %s", cpath);
continue;
}
sym[len < _Q_PATH_MAX ? len : _Q_PATH_MAX - 1] = '\0';
/* syntax: sym src -> dst mtime */
if (!pretend)
fprintf(contents, "sym %s -> %s %zu\n",
cpath, sym, (size_t)st.st_mtime);
qprintf("%s>>>%s %s%s -> %s%s\n", GREEN, NORM,
CYAN, cpath, sym, NORM);
*objs = add_set(cpath, *objs);
if (pretend)
continue;
/* Make it in the dest tree */
if (symlinkat(sym, subfd_dst, name)) {
/* If the symlink exists, unlink it and try again */
if (errno != EEXIST ||
unlinkat(subfd_dst, name, 0) ||
symlinkat(sym, subfd_dst, name)) {
warnp("could not create link %s to %s", cpath, sym);
continue;
}
}
struct timespec times[2];
times[0] = get_stat_mtime(&st);
times[1] = get_stat_mtime(&st);
utimensat(subfd_dst, name, times, AT_SYMLINK_NOFOLLOW);
} else {
/* WTF is this !? */
warnp("unknown file type %s", cpath);
continue;
}
}
ret = 0;
done:
close(subfd_src);