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/* readlink.c - Return string representation of a symbolic link.
*
* Copyright 2007 Rob Landley <rob@landley.net>
// -ef positions match ABS_FILE ABS_PATH
USE_READLINK(NEWTOY(readlink, "<1nqmef(canonicalize)[-mef]", TOYFLAG_USR|TOYFLAG_BIN))
USE_REALPATH(OLDTOY(realpath, readlink, TOYFLAG_USR|TOYFLAG_BIN))
config READLINK
bool "readlink"
default y
help
usage: readlink FILE...
With no options, show what symlink points to, return error if not symlink.
Options for producing canonical paths (all symlinks/./.. resolved):
-e Canonical path to existing entry (fail if missing)
-f Full path (fail if directory missing)
-m Ignore missing entries, show where it would be
-n No trailing newline
-q Quiet (no output, just error code)
config REALPATH
bool "realpath"
default y
help
usage: realpath FILE...
Display the canonical absolute pathname
*/
#define FOR_readlink
#define FORCE_FLAGS
#include "toys.h"
void readlink_main(void)
{
char **arg, *s;
if (toys.which->name[3]=='l') toys.optflags |= FLAG_f;
for (arg = toys.optargs; *arg; arg++) {
// Calculating full canonical path?
// Take advantage of flag positions: m = 0, f = ABS_PATH, e = ABS_FILE
if (toys.optflags & (FLAG_f|FLAG_e|FLAG_m))
s = xabspath(*arg, toys.optflags&(FLAG_f|FLAG_e));
else s = xreadlink(*arg);
if (s) {
if (!FLAG(q)) xprintf("%s%s", s, (FLAG(n) && !arg[1]) ? "" : "\n");
free(s);
} else toys.exitval = 1;
}
}
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