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mkksiso: Check the length of the filenames

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With -joliet-long it allows longer filenames, but silently drops the
ones longer than 253 characters. Check for this and raise an error.

Related: rhbz#2028104
This commit is contained in:
Brian C. Lane 2021-12-08 10:18:33 -08:00
parent 1644a5db11
commit ba872b915f
1 changed files with 27 additions and 14 deletions
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41
src/sbin/mkksiso
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@ -31,6 +31,9 @@ NO_EFI = 0
EFIBOOT = 1 EFIBOOT = 1
MACBOOT = 2 MACBOOT = 2
# Maximum filename length
MAX_FNAME = 253
class Tool(): class Tool():
"""A class to check for executables and required files""" """A class to check for executables and required files"""
tools = [] tools = []
@ -103,19 +106,29 @@ class MkmacbootTool(MkefibootTool):
class MakeISOTool(Tool): class MakeISOTool(Tool):
"""Class to hold details for specific iso creation tools""" """Class to hold details for specific iso creation tools"""
def check_file_sizes(self, grafts): def check_files(self, grafts):
"""Return True any file exceeds 4GiB""" """Check file size and filename length for problems
Returns True if any file exceeds 4GiB
Raises a RuntimeError if any filename is longer than MAX_FNAME
This examines all the files included, so may take some time.
"""
big_file = False
for src, _ in grafts: for src, _ in grafts:
if os.path.isdir(src): if os.path.isdir(src):
for top, dirs, files in os.walk(src): for top, dirs, files in os.walk(src):
for f in files + dirs: for f in files + dirs:
if os.stat(os.path.join(top,f)).st_size >= 4*1024**3: if os.stat(os.path.join(top,f)).st_size >= 4*1024**3:
return True big_file = True
if len(f) > MAX_FNAME:
raise RuntimeError("iso contains filenames that are too long: %s" % f)
else: else:
if os.stat(src).st_size >= 4*1024**3: if os.stat(src).st_size >= 4*1024**3:
return True big_file = True
if len(src) > MAX_FNAME:
raise RuntimeError("iso contains filenames that are too long: %s" % f)
return False return big_file
def _exec(self, cmd, grafts, output_iso, efimode=NO_EFI, implantmd5=True): def _exec(self, cmd, grafts, output_iso, efimode=NO_EFI, implantmd5=True):
"""Add the grafts and run the command and then implant the md5 checksums""" """Add the grafts and run the command and then implant the md5 checksums"""
@ -173,7 +186,7 @@ class Mkisofs_aarch64(MakeISOTool):
if efimode > EFIBOOT: if efimode > EFIBOOT:
cmd.extend(["-eltorito-alt-boot", "-e", "images/macboot.img", "-no-emul-boot"]) cmd.extend(["-eltorito-alt-boot", "-e", "images/macboot.img", "-no-emul-boot"])
if self.check_file_sizes(grafts): if self.check_files(grafts):
cmd.append("-allow-limited-size") cmd.append("-allow-limited-size")
# Create the iso and implant the md5 checksums # Create the iso and implant the md5 checksums
@ -194,7 +207,7 @@ class Mkisofs_ppc(MakeISOTool):
if log.root.level < log.INFO: if log.root.level < log.INFO:
cmd.append("--verbose") cmd.append("--verbose")
if self.check_file_sizes(grafts): if self.check_files(grafts):
cmd.append("-allow-limited-size") cmd.append("-allow-limited-size")
# Create the iso and implant the md5 checksums # Create the iso and implant the md5 checksums
@ -215,7 +228,7 @@ class Mkisofs_ppc64le(MakeISOTool):
if log.root.level < log.INFO: if log.root.level < log.INFO:
cmd.append("--verbose") cmd.append("--verbose")
if self.check_file_sizes(grafts): if self.check_files(grafts):
cmd.append("-allow-limited-size") cmd.append("-allow-limited-size")
# Create the iso and implant the md5 checksums # Create the iso and implant the md5 checksums
@ -237,7 +250,7 @@ class Mkisofs_s390(MakeISOTool):
if log.root.level < log.INFO: if log.root.level < log.INFO:
cmd.append("--verbose") cmd.append("--verbose")
if self.check_file_sizes(grafts): if self.check_files(grafts):
cmd.append("-allow-limited-size") cmd.append("-allow-limited-size")
# Create the iso and implant the md5 checksums # Create the iso and implant the md5 checksums
@ -263,7 +276,7 @@ class Mkisofs_x86_64(MakeISOTool):
if efimode > EFIBOOT: if efimode > EFIBOOT:
cmd.extend(["-eltorito-alt-boot", "-e", "images/macboot.img", "-no-emul-boot"]) cmd.extend(["-eltorito-alt-boot", "-e", "images/macboot.img", "-no-emul-boot"])
if self.check_file_sizes(grafts): if self.check_files(grafts):
cmd.append("-allow-limited-size") cmd.append("-allow-limited-size")
# Create the iso, implant the md5 checksums, and create hybrid iso # Create the iso, implant the md5 checksums, and create hybrid iso
@ -286,7 +299,7 @@ class Xorrisofs_aarch64(MakeISOTool):
if efimode == MACBOOT: if efimode == MACBOOT:
cmd.extend(["-eltorito-alt-boot", "-e", "images/macboot.img", "-no-emul-boot"]) cmd.extend(["-eltorito-alt-boot", "-e", "images/macboot.img", "-no-emul-boot"])
if self.check_file_sizes(grafts): if self.check_files(grafts):
cmd.extend(["-iso-level", "3"]) cmd.extend(["-iso-level", "3"])
# Create the iso and implant the md5 checksums # Create the iso and implant the md5 checksums
@ -307,7 +320,7 @@ class Xorrisofs_ppc64le(MakeISOTool):
if log.root.level < log.INFO: if log.root.level < log.INFO:
cmd.append("--verbose") cmd.append("--verbose")
if self.check_file_sizes(grafts): if self.check_files(grafts):
cmd.extend(["-iso-level", "3"]) cmd.extend(["-iso-level", "3"])
# Create the iso and implant the md5 checksums # Create the iso and implant the md5 checksums
@ -328,7 +341,7 @@ class Xorrisofs_s390(MakeISOTool):
if log.root.level < log.INFO: if log.root.level < log.INFO:
cmd.append("--verbose") cmd.append("--verbose")
if self.check_file_sizes(grafts): if self.check_files(grafts):
cmd.extend(["-iso-level", "3"]) cmd.extend(["-iso-level", "3"])
# Create the iso and implant the md5 checksums # Create the iso and implant the md5 checksums
@ -355,7 +368,7 @@ class Xorrisofs_x86_64(MakeISOTool):
if efimode == MACBOOT: if efimode == MACBOOT:
cmd.extend(["-eltorito-alt-boot", "-e", "images/macboot.img", "-no-emul-boot", "-isohybrid-gpt-hfsplus"]) cmd.extend(["-eltorito-alt-boot", "-e", "images/macboot.img", "-no-emul-boot", "-isohybrid-gpt-hfsplus"])
if self.check_file_sizes(grafts): if self.check_files(grafts):
cmd.extend(["-iso-level", "3"]) cmd.extend(["-iso-level", "3"])
# Create the iso and implant the md5 checksums # Create the iso and implant the md5 checksums