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cp,mv: simpler arg[cv] handling -> smallish code savings

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This commit is contained in:
Denis Vlasenko 2007-08-24 21:46:24 +00:00
parent 2062fc4155
commit 6666ac42a5
4 changed files with 45 additions and 39 deletions
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30
coreutils/cp.c
View File

@ -40,12 +40,16 @@ int cp_main(int argc, char **argv)
OPT_L = 1 << (sizeof(FILEUTILS_CP_OPTSTR)+3),
};
// Need at least two arguments
// Soft- and hardlinking don't mix
// -P and -d are the same (-P is POSIX, -d is GNU)
// -r and -R are the same
// -a = -pdR
opt_complementary = "l--s:s--l:Pd:rR:apdR";
opt_complementary = "-2:l--s:s--l:Pd:rR:apdR";
flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPHL");
argc -= optind;
argv += optind;
flags ^= FILEUTILS_DEREFERENCE; /* The sense of this flag was reversed. */
/* Default behavior of cp is to dereference, so we don't have to do
* anything special when we are given -L.
* The behavior of -H is *almost* like -L, but not quite, so let's
@ -60,19 +64,12 @@ int cp_main(int argc, char **argv)
}
#endif
flags ^= FILEUTILS_DEREFERENCE; /* The sense of this flag was reversed. */
if (optind + 2 > argc) {
bb_show_usage();
}
last = argv[argc - 1];
argv += optind;
/* If there are only two arguments and... */
if (optind + 2 == argc) {
if (argc == 2) {
s_flags = cp_mv_stat2(*argv, &source_stat,
(flags & FILEUTILS_DEREFERENCE) ? stat : lstat);
/* TODO: does coreutils cp exit? "cp BAD GOOD dir"... */
if (s_flags < 0)
return EXIT_FAILURE;
d_flags = cp_mv_stat(last, &dest_stat);
@ -85,19 +82,24 @@ int cp_main(int argc, char **argv)
((flags & FILEUTILS_RECUR) && (s_flags & 2) && !d_flags)
) {
/* ...do a simple copy. */
dest = xstrdup(last);
goto DO_COPY; /* Note: optind+2==argc implies argv[1]==last below. */
dest = last;
goto DO_COPY; /* NB: argc==2 -> *++argv==last */
}
}
do {
while (1) {
dest = concat_path_file(last, bb_get_last_path_component(*argv));
DO_COPY:
if (copy_file(*argv, dest, flags) < 0) {
status = 1;
}
if (*++argv == last) {
/* possibly leaking dest... */
break;
}
free((void*)dest);
} while (*++argv != last);
}
/* Exit. We are NOEXEC, not NOFORK. We do exit at the end of main() */
return status;
}

6
coreutils/install.c
View File

@ -123,10 +123,12 @@ int install_main(int argc, char **argv)
copy_flags |= FILEUTILS_PRESERVE_STATUS;
}
mode = 0666;
if (flags & OPT_MODE) bb_parse_mode(mode_str, &mode);
if (flags & OPT_MODE)
bb_parse_mode(mode_str, &mode);
uid = (flags & OPT_OWNER) ? get_ug_id(uid_str, xuname2uid) : getuid();
gid = (flags & OPT_GROUP) ? get_ug_id(gid_str, xgroup2gid) : getgid();
if (flags & (OPT_OWNER|OPT_GROUP)) umask(0);
if (flags & (OPT_OWNER|OPT_GROUP))
umask(0);
/* Create directories
* don't use bb_make_directory() as it can't change uid or gid

37
coreutils/mv.c
View File

@ -47,16 +47,15 @@ int mv_main(int argc, char **argv)
#if ENABLE_FEATURE_MV_LONG_OPTIONS
applet_long_options = mv_longopts;
#endif
opt_complementary = "f-i:i-f";
// Need at least two arguments
// -f unsets -i, -i unsets -f
opt_complementary = "-2:f-i:i-f";
flags = getopt32(argv, "fi");
if (optind + 2 > argc) {
bb_show_usage();
}
last = argv[argc - 1];
argc -= optind;
argv += optind;
last = argv[argc - 1];
if (optind + 2 == argc) {
if (argc == 2) {
dest_exists = cp_mv_stat(last, &dest_stat);
if (dest_exists < 0) {
return 1;
@ -75,11 +74,11 @@ int mv_main(int argc, char **argv)
goto RET_1;
}
DO_MOVE:
if (dest_exists && !(flags & OPT_FILEUTILS_FORCE) &&
((access(dest, W_OK) < 0 && isatty(0)) ||
(flags & OPT_FILEUTILS_INTERACTIVE))) {
DO_MOVE:
if (dest_exists && !(flags & OPT_FILEUTILS_FORCE)
&& ((access(dest, W_OK) < 0 && isatty(0))
|| (flags & OPT_FILEUTILS_INTERACTIVE))
) {
if (fprintf(stderr, "mv: overwrite '%s'? ", dest) < 0) {
goto RET_1; /* Ouch! fprintf failed! */
}
@ -91,8 +90,9 @@ DO_MOVE:
struct stat source_stat;
int source_exists;
if (errno != EXDEV ||
(source_exists = cp_mv_stat(*argv, &source_stat)) < 1) {
if (errno != EXDEV
|| (source_exists = cp_mv_stat(*argv, &source_stat)) < 1
) {
bb_perror_msg("cannot rename '%s'", *argv);
} else {
if (dest_exists) {
@ -116,15 +116,16 @@ DO_MOVE:
#if ENABLE_SELINUX
copy_flag |= FILEUTILS_PRESERVE_SECURITY_CONTEXT;
#endif
if ((copy_file(*argv, dest, copy_flag) >= 0) &&
(remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)) {
if ((copy_file(*argv, dest, copy_flag) >= 0)
&& (remove_file(*argv, FILEUTILS_RECUR | FILEUTILS_FORCE) >= 0)
) {
goto RET_0;
}
}
RET_1:
RET_1:
status = 1;
}
RET_0:
RET_0:
if (dest != last) {
free((void *) dest);
}

11
libbb/getopt32.c
View File

@ -178,7 +178,7 @@ Special characters:
This is typically used to implement "print verbose usage message
and exit" option.
"-" A dash between two options causes the second of the two
"a-b" A dash between two options causes the second of the two
to be unset (and ignored) if it is given on the command line.
[FIXME: what if they are the same? like "x-x"? Is it ever useful?]
@ -204,7 +204,7 @@ Special characters:
if (opt & 4)
printf("Detected odd -x usage\n");
"--" A double dash between two options, or between an option and a group
"a--b" A double dash between two options, or between an option and a group
of options, means that they are mutually exclusive. Unlike
the "-" case above, an error will be forced if the options
are used together.
@ -220,7 +220,7 @@ Special characters:
"x--x" Variation of the above, it means that -x option should occur
at most once.
"::" A double colon after a char in opt_complementary means that the
"a::" A double colon after a char in opt_complementary means that the
option can occur multiple times. Each occurrence will be saved as
a llist_t element instead of char*.
@ -240,7 +240,7 @@ Special characters:
root:x:0:0:root:/root:/bin/bash
user:x:500:500::/home/user:/bin/bash
"?" An "?" between an option and a group of options means that
"a?b" A "?" between an option and a group of options means that
at least one of them is required to occur if the first option
occurs in preceding command line arguments.
@ -259,7 +259,7 @@ Special characters:
For example from "start-stop-daemon" applet:
// Don't allow -KS -SK, but -S or -K is required
opt_complementary = "K:S:?K--S:S--K";
opt_complementary = "K:S:K--S:S--K";
flags = getopt32(argv, "KS...);
@ -268,6 +268,7 @@ Special characters:
max 3 args; count uses of '-2'; min 2 args; if there is
a '-2' option then unset '-3', '-X' and '-a'; if there is
a '-2' and after it a '-x' then error out.
But it's far too obfuscated. Use ':' to separate groups.
*/
/* Code here assumes that 'unsigned' is at least 32 bits wide */