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From b599e28112ce5cee98b9ffa7bd96886ec5155e9c Mon Sep 17 00:00:00 2001
From: Panu Matilainen <pmatilai@redhat.com>
Date: Fri, 11 Feb 2022 15:35:16 +0200
Subject: [PATCH] Convert the file creation steps the *at() family of calls
Supposedly no functional changes here, we just need all these things
converted before we can swap over to relative paths.
---
configure.ac | 2 +-
lib/fsm.c | 59 ++++++++++++++++++++++++++++++-----------------------------
2 files changed, 31 insertions(+), 30 deletions(-)
diff --git a/configure.ac b/configure.ac
index 0099e5f..ac90037 100644
--- a/configure.ac
+++ b/configure.ac
@@ -581,7 +581,7 @@ AC_CHECK_FUNCS([secure_getenv __secure_getenv])
AC_CHECK_FUNCS(
[mkstemp getcwd basename dirname realpath setenv unsetenv regcomp lchown \
utimes getline localtime_r statvfs getaddrinfo \
- openat mkdirat fstatat ],
+ openat mkdirat fstatat linkat symlinkat mkfifoat mknodat ],
[], [AC_MSG_ERROR([function required by rpm])])
AC_LIBOBJ(fnmatch)
diff --git a/lib/fsm.c b/lib/fsm.c
index ae1bd3f..8443954 100644
--- a/lib/fsm.c
+++ b/lib/fsm.c
@@ -214,13 +214,13 @@ const char * dnlNextIterator(DNLI_t dnli)
return dn;
}
-static int fsmLink(const char *opath, const char *path)
+static int fsmLink(int odirfd, const char *opath, int dirfd, const char *path)
{
- int rc = link(opath, path);
+ int rc = linkat(odirfd, opath, dirfd, path, 0);
if (_fsm_debug) {
- rpmlog(RPMLOG_DEBUG, " %8s (%s, %s) %s\n", __func__,
- opath, path, (rc < 0 ? strerror(errno) : ""));
+ rpmlog(RPMLOG_DEBUG, " %8s (%d %s, %d %s) %s\n", __func__,
+ odirfd, opath, dirfd, path, (rc < 0 ? strerror(errno) : ""));
}
if (rc < 0)
@@ -139,17 +139,18 @@ static int fsmClose(FD_t *wfdp)
return rc;
}
-static int fsmOpen(FD_t *wfdp, const char *dest)
+static int fsmOpen(FD_t *wfdp, int dirfd, const char *dest)
{
int rc = 0;
/* Create the file with 0200 permissions (write by owner). */
- {
- mode_t old_umask = umask(0577);
- *wfdp = Fopen(dest, "wx.ufdio");
- umask(old_umask);
+ int fd = openat(dirfd, dest, O_WRONLY|O_EXCL|O_CREAT, 0200);
+
+ if (fd >= 0) {
+ *wfdp = fdDup(fd);
+ close(fd);
}
- if (Ferror(*wfdp))
+ if (fd < 0 || Ferror(*wfdp))
rc = RPMERR_OPEN_FAILED;
if (_fsm_debug) {
@@ -174,7 +175,7 @@ static int fsmUnpack(rpmfi fi, FD_t fd, rpmpsm psm, int nodigest)
return rc;
}
-static int fsmMkfile(rpmfi fi, struct filedata_s *fp, rpmfiles files,
+static int fsmMkfile(int dirfd, rpmfi fi, struct filedata_s *fp, rpmfiles files,
rpmpsm psm, int nodigest,
struct filedata_s ** firstlink, FD_t *firstlinkfile)
{
@@ -183,7 +184,7 @@ static int fsmMkfile(rpmfi fi, struct filedata_s *fp, rpmfiles files,
if (*firstlink == NULL) {
/* First encounter, open file for writing */
- rc = fsmOpen(&fd, fp->fpath);
+ rc = fsmOpen(&fd, dirfd, fp->fpath);
/* If it's a part of a hardlinked set, the content may come later */
if (fp->sb.st_nlink > 1) {
*firstlink = fp;
@@ -192,7 +193,7 @@ static int fsmMkfile(rpmfi fi, struct filedata_s *fp, rpmfiles files,
} else {
/* Create hard links for others and avoid redundant metadata setting */
if (*firstlink != fp) {
- rc = fsmLink((*firstlink)->fpath, fp->fpath);
+ rc = fsmLink(dirfd, (*firstlink)->fpath, dirfd, fp->fpath);
}
fd = *firstlinkfile;
}
@@ -382,13 +383,13 @@ static int ensureDir(rpmPlugins plugins, const char *p, int owned, int create)
return dirfd;
}
-static int fsmMkfifo(const char *path, mode_t mode)
+static int fsmMkfifo(int dirfd, const char *path, mode_t mode)
{
- int rc = mkfifo(path, (mode & 07777));
+ int rc = mkfifoat(dirfd, path, (mode & 07777));
if (_fsm_debug) {
- rpmlog(RPMLOG_DEBUG, " %8s (%s, 0%04o) %s\n",
- __func__, path, (unsigned)(mode & 07777),
+ rpmlog(RPMLOG_DEBUG, " %8s (%d %s, 0%04o) %s\n",
+ __func__, dirfd, path, (unsigned)(mode & 07777),
(rc < 0 ? strerror(errno) : ""));
}
@@ -398,14 +399,14 @@ static int fsmMkfifo(const char *path, mode_t mode)
return rc;
}
-static int fsmMknod(const char *path, mode_t mode, dev_t dev)
+static int fsmMknod(int dirfd, const char *path, mode_t mode, dev_t dev)
{
/* FIX: check S_IFIFO or dev != 0 */
- int rc = mknod(path, (mode & ~07777), dev);
+ int rc = mknodat(dirfd, path, (mode & ~07777), dev);
if (_fsm_debug) {
- rpmlog(RPMLOG_DEBUG, " %8s (%s, 0%o, 0x%x) %s\n",
- __func__, path, (unsigned)(mode & ~07777),
+ rpmlog(RPMLOG_DEBUG, " %8s (%d %s, 0%o, 0x%x) %s\n",
+ __func__, dirfd, path, (unsigned)(mode & ~07777),
(unsigned)dev, (rc < 0 ? strerror(errno) : ""));
}
@@ -440,13 +441,13 @@ static void fsmDebug(const char *fpath, rpmFileAction action,
(fpath ? fpath : ""));
}
-static int fsmSymlink(const char *opath, const char *path)
+static int fsmSymlink(const char *opath, int dirfd, const char *path)
{
- int rc = symlink(opath, path);
+ int rc = symlinkat(opath, dirfd, path);
if (_fsm_debug) {
- rpmlog(RPMLOG_DEBUG, " %8s (%s, %s) %s\n", __func__,
- opath, path, (rc < 0 ? strerror(errno) : ""));
+ rpmlog(RPMLOG_DEBUG, " %8s (%s, %d %s) %s\n", __func__,
+ opath, dirfd, path, (rc < 0 ? strerror(errno) : ""));
}
if (rc < 0)
@@ -884,7 +885,7 @@ int rpmPackageFilesInstall(rpmts ts, rpmte te, rpmfiles files,
if (S_ISREG(fp->sb.st_mode)) {
if (rc == RPMERR_ENOENT) {
- rc = fsmMkfile(fi, fp, files, psm, nodigest,
+ rc = fsmMkfile(di.dirfd, fi, fp, files, psm, nodigest,
&firstlink, &firstlinkfile);
}
} else if (S_ISDIR(fp->sb.st_mode)) {
@@ -896,19 +897,19 @@ int rpmPackageFilesInstall(rpmts ts, rpmte te, rpmfiles files,
}
} else if (S_ISLNK(fp->sb.st_mode)) {
if (rc == RPMERR_ENOENT) {
- rc = fsmSymlink(rpmfiFLink(fi), fp->fpath);
+ rc = fsmSymlink(rpmfiFLink(fi), di.dirfd, fp->fpath);
}
} else if (S_ISFIFO(fp->sb.st_mode)) {
/* This mimics cpio S_ISSOCK() behavior but probably isn't right */
if (rc == RPMERR_ENOENT) {
- rc = fsmMkfifo(fp->fpath, 0000);
+ rc = fsmMkfifo(di.dirfd, fp->fpath, 0000);
}
} else if (S_ISCHR(fp->sb.st_mode) ||
S_ISBLK(fp->sb.st_mode) ||
S_ISSOCK(fp->sb.st_mode))
{
if (rc == RPMERR_ENOENT) {
- rc = fsmMknod(fp->fpath, fp->sb.st_mode, fp->sb.st_rdev);
+ rc = fsmMknod(di.dirfd, fp->fpath, fp->sb.st_mode, fp->sb.st_rdev);
}
} else {
/* XXX Special case /dev/log, which shouldn't be packaged anyways */
--
1.8.3.1
|
