1/* readlink.c - Return string representation of a symbolic link. 2 * 3 * Copyright 2007 Rob Landley <rob@landley.net> 4 5USE_READLINK(NEWTOY(readlink, "<1nqmef(canonicalize)[-mef]", TOYFLAG_USR|TOYFLAG_BIN)) 6 7config READLINK 8 bool "readlink" 9 default y 10 help 11 usage: readlink FILE... 12 13 With no options, show what symlink points to, return error if not symlink. 14 15 Options for producing canonical paths (all symlinks/./.. resolved): 16 17 -e Canonical path to existing entry (fail if missing) 18 -f Full path (fail if directory missing) 19 -m Ignore missing entries, show where it would be 20 -n No trailing newline 21 -q Quiet (no output, just error code) 22*/ 23 24#define FOR_readlink 25#include "toys.h" 26 27void readlink_main(void) 28{ 29 char **arg, *s; 30 31 for (arg = toys.optargs; *arg; arg++) { 32 // Calculating full canonical path? 33 // Take advantage of flag positions to calculate m = -1, f = 0, e = 1 34 if (toys.optflags & (FLAG_f|FLAG_e|FLAG_m)) 35 s = xabspath(*arg, (toys.optflags&(FLAG_f|FLAG_e))-1); 36 else s = xreadlink(*arg); 37 38 if (s) { 39 if (!FLAG(q)) xprintf(FLAG(n) ? "%s" : "%s\n", s); 40 if (CFG_TOYBOX_FREE) free(s); 41 } else toys.exitval = 1; 42 } 43} 44