|
| 1 | +import re |
| 2 | + |
| 3 | +import shutil |
| 4 | +import sys |
| 5 | +from pathlib import Path |
| 6 | + |
| 7 | +from tqdm import tqdm |
| 8 | + |
| 9 | +from .. import core |
| 10 | + |
| 11 | + |
| 12 | +CHOWN_PATTERN = re.compile("^([^:]+)?(:([^:]+))?$") |
| 13 | + |
| 14 | +parser = core.create_parser( |
| 15 | + usage=( |
| 16 | + "%prog [OPTION]... [USER][:[GROUP]] FILE...", |
| 17 | + "%prog [OPTION]... --reference=RFILE FILE...", |
| 18 | + ), |
| 19 | + description="Change the user and/or group ownership of each FILE.", |
| 20 | +) |
| 21 | + |
| 22 | +parser.add_option( |
| 23 | + "-f", |
| 24 | + "--silent", |
| 25 | + "--quiet", |
| 26 | + dest="verbosity", |
| 27 | + action="store_const", |
| 28 | + const=0, |
| 29 | + default=1, |
| 30 | + help="suppress most error messages", |
| 31 | +) |
| 32 | +parser.add_option( |
| 33 | + "-c", |
| 34 | + "--changes", |
| 35 | + dest="verbosity", |
| 36 | + action="store_const", |
| 37 | + const=2, |
| 38 | + help="report only when changes are made", |
| 39 | +) |
| 40 | +parser.add_option( |
| 41 | + "-v", |
| 42 | + "--verbose", |
| 43 | + dest="verbosity", |
| 44 | + action="store_const", |
| 45 | + const=3, |
| 46 | + help="print a diagnostic for each file", |
| 47 | +) |
| 48 | + |
| 49 | +parser.add_option( |
| 50 | + "--progress", |
| 51 | + dest="progress", |
| 52 | + action="store_true", |
| 53 | + help="show a progress bar when changing groups", |
| 54 | +) |
| 55 | +parser.add_option( |
| 56 | + "--no-progress", |
| 57 | + dest="progress", |
| 58 | + action="store_false", |
| 59 | + default=False, |
| 60 | + help="do not show a progress bar (default)", |
| 61 | +) |
| 62 | + |
| 63 | +parser.add_option( |
| 64 | + "--dereference", |
| 65 | + action="store_true", |
| 66 | + default=True, |
| 67 | + help="affect symlink referents instead of the symlinks themselves (default)", |
| 68 | +) |
| 69 | +parser.add_option( |
| 70 | + "-h", |
| 71 | + "--no-dereference", |
| 72 | + dest="dereference", |
| 73 | + action="store_false", |
| 74 | + help="opposite of --dereference", |
| 75 | +) |
| 76 | + |
| 77 | +parser.add_option( |
| 78 | + "--no-preserve-root", |
| 79 | + dest="preserve_root", |
| 80 | + action="store_false", |
| 81 | + default=False, |
| 82 | + help="do not treat '/' specially (default)", |
| 83 | +) |
| 84 | +parser.add_option( |
| 85 | + "--preserve-root", |
| 86 | + dest="preserve_root", |
| 87 | + action="store_true", |
| 88 | + help="fail to operate recursively on '/'", |
| 89 | +) |
| 90 | + |
| 91 | +parser.add_option( |
| 92 | + "--from", |
| 93 | + dest="from_spec", # prevent name collision with the `from` keyword |
| 94 | + metavar="[CURRENT_OWNER][:[CURRENT_GROUP]]", |
| 95 | + help="only affect files with CURRENT_OWNER and CURRENT_GROUP" |
| 96 | + " (either is optional and only checked if given)", |
| 97 | +) |
| 98 | + |
| 99 | +parser.add_option("--reference", metavar="RFILE") |
| 100 | + |
| 101 | +parser.add_option( |
| 102 | + "-R", "--recursive", action="store_true", help="operate on directories recursively" |
| 103 | +) |
| 104 | +parser.add_option( |
| 105 | + "-H", |
| 106 | + dest="recurse_mode", |
| 107 | + action="store_const", |
| 108 | + const="H", |
| 109 | + help="traverse directory symlinks only if they were given as command line arguments", |
| 110 | +) |
| 111 | +parser.add_option( |
| 112 | + "-L", |
| 113 | + dest="recurse_mode", |
| 114 | + action="store_const", |
| 115 | + const="L", |
| 116 | + help="traverse all directory symlinks encountered", |
| 117 | +) |
| 118 | +parser.add_option( |
| 119 | + "-P", |
| 120 | + dest="recurse_mode", |
| 121 | + action="store_const", |
| 122 | + const="P", |
| 123 | + default="P", |
| 124 | + help="do not traverse any symlinks (default)", |
| 125 | +) |
| 126 | + |
| 127 | + |
| 128 | +@core.command(parser) |
| 129 | +def python_userland_chown(opts, args): |
| 130 | + if not args: |
| 131 | + parser.error("missing operand") |
| 132 | + |
| 133 | + from_uid: int | None = None |
| 134 | + from_gid: int | None = None |
| 135 | + |
| 136 | + if opts.from_spec: |
| 137 | + from_uid, from_gid = core.parse_onwer_spec(parser, opts.from_spec) |
| 138 | + |
| 139 | + chown_args = {"follow_symlinks": opts.dereference} |
| 140 | + |
| 141 | + if opts.reference: |
| 142 | + try: |
| 143 | + ref_stat = Path(opts.reference).stat(follow_symlinks=True) |
| 144 | + except OSError as e: |
| 145 | + print(e, file=sys.stderr) |
| 146 | + return 1 |
| 147 | + |
| 148 | + chown_args["user"] = ref_stat.st_uid |
| 149 | + chown_args["group"] = ref_stat.st_gid |
| 150 | + else: |
| 151 | + owner_spec = args.pop(0) |
| 152 | + |
| 153 | + if not args: |
| 154 | + parser.error(f"missing operand after '{owner_spec}'") |
| 155 | + |
| 156 | + if not (owner_match := CHOWN_PATTERN.match(owner_spec)): |
| 157 | + parser.error(f"invalid owner spec: {owner_spec}") |
| 158 | + |
| 159 | + chown_args["user"] = ( |
| 160 | + core.parse_user(parser, owner_match.group(1)) |
| 161 | + if owner_match.group(1) |
| 162 | + else None |
| 163 | + ) |
| 164 | + chown_args["group"] = ( |
| 165 | + core.parse_group(parser, owner_match.group(3)) |
| 166 | + if owner_match.group(3) |
| 167 | + else None |
| 168 | + ) |
| 169 | + |
| 170 | + failed = False |
| 171 | + |
| 172 | + for file in core.traverse_files( |
| 173 | + (tqdm(args, ascii=True, desc="Changing ownership") if opts.progress else args), |
| 174 | + recurse_mode=opts.recurse_mode if opts.recursive else None, |
| 175 | + preserve_root=opts.preserve_root, |
| 176 | + ): |
| 177 | + if not file: |
| 178 | + failed = True |
| 179 | + continue |
| 180 | + |
| 181 | + try: |
| 182 | + stat = file.stat(follow_symlinks=opts.dereference) |
| 183 | + prev_uid = stat.st_uid |
| 184 | + prev_gid = stat.st_gid |
| 185 | + except OSError as e: |
| 186 | + failed = True |
| 187 | + print(e, file=sys.stderr) |
| 188 | + print( |
| 189 | + f"failed to change ownership of '{file}' to {owner_spec}", |
| 190 | + file=sys.stderr, |
| 191 | + ) |
| 192 | + continue |
| 193 | + |
| 194 | + prev_uname = core.user_display_name_from_id(prev_uid) |
| 195 | + prev_gname = core.group_display_name_from_id(prev_gid) |
| 196 | + |
| 197 | + if (from_uid is not None and prev_uid != from_uid) or ( |
| 198 | + from_gid is not None and prev_gid != from_gid |
| 199 | + ): |
| 200 | + if opts.verbosity > 2: |
| 201 | + print(f"ownership of '{file}' retained as {prev_uname}:{prev_gname}") |
| 202 | + continue |
| 203 | + |
| 204 | + try: |
| 205 | + shutil.chown(file, **chown_args) |
| 206 | + except OSError as e: |
| 207 | + failed = True |
| 208 | + if opts.verbosity: |
| 209 | + print(e, file=sys.stderr) |
| 210 | + print( |
| 211 | + f"failed to change ownership of '{file}' to {owner_spec}", |
| 212 | + file=sys.stderr, |
| 213 | + ) |
| 214 | + continue |
| 215 | + |
| 216 | + if prev_uid == chown_args["user"] or prev_gid == chown_args["group"]: |
| 217 | + if opts.verbosity > 2: |
| 218 | + print(f"ownership of '{file}' retained as {prev_uname}:{prev_gname}") |
| 219 | + elif opts.verbosity > 1: |
| 220 | + print( |
| 221 | + f"changed ownership of '{file}' from" |
| 222 | + f" {prev_uname}:{prev_gname} to {owner_spec}" |
| 223 | + ) |
| 224 | + |
| 225 | + return int(failed) |
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