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readlink: support -n, -v, -s and -q too if support for -f is requested
function old new delta readlink_main 104 135 +31 packed_usage 26322 26321 -1 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 31/-1) Total: 30 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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@ -6,9 +6,31 @@
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*
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* Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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/*
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* # readlink --version
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* readlink (GNU coreutils) 6.10
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* # readlink --help
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* -f, --canonicalize
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* canonicalize by following every symlink in
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* every component of the given name recursively;
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* all but the last component must exist
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* -e, --canonicalize-existing
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* canonicalize by following every symlink in
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* every component of the given name recursively,
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* all components must exist
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* -m, --canonicalize-missing
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* canonicalize by following every symlink in
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* every component of the given name recursively,
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* without requirements on components existence
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* -n, --no-newline do not output the trailing newline
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* -q, --quiet, -s, --silent suppress most error messages
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* -v, --verbose report error messages
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*
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* bbox supports: -f -n -v (fully), -q -s (accepts but ignores)
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*/
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int readlink_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int readlink_main(int argc UNUSED_PARAM, char **argv)
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{
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@ -20,7 +42,7 @@ int readlink_main(int argc UNUSED_PARAM, char **argv)
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unsigned opt;
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/* We need exactly one non-option argument. */
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opt_complementary = "=1";
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opt = getopt32(argv, "f");
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opt = getopt32(argv, "fnvsq");
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fname = argv[optind];
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)
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IF_NOT_FEATURE_READLINK_FOLLOW(
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@ -30,9 +52,10 @@ int readlink_main(int argc UNUSED_PARAM, char **argv)
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)
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/* compat: coreutils readlink reports errors silently via exit code */
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if (!(opt & 4)) /* not -v */
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logmode = LOGMODE_NONE;
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if (opt) {
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if (opt & 1) { /* -f */
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buf = realpath(fname, pathbuf);
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} else {
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buf = xmalloc_readlink_or_warn(fname);
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@ -40,7 +63,7 @@ int readlink_main(int argc UNUSED_PARAM, char **argv)
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if (!buf)
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return EXIT_FAILURE;
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puts(buf);
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printf((opt & 2) ? "%s" : "%s\n", buf);
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if (ENABLE_FEATURE_CLEAN_UP && !opt)
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free(buf);
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@ -3466,12 +3466,15 @@
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"files do not block on disk I/O"
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#define readlink_trivial_usage \
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IF_FEATURE_READLINK_FOLLOW("[-f] ") "FILE"
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IF_FEATURE_READLINK_FOLLOW("[-fnv] ") "FILE"
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#define readlink_full_usage "\n\n" \
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"Display the value of a symlink" \
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IF_FEATURE_READLINK_FOLLOW( "\n" \
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"\nOptions:" \
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"\n -f Canonicalize by following all symlinks") \
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"\n -f Canonicalize by following all symlinks" \
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"\n -n Don't add newline" \
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"\n -v Verbose" \
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) \
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#define readprofile_trivial_usage \
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"[OPTIONS]..."
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