diff options
Diffstat (limited to 'builtins/hash.c')
| -rw-r--r-- | builtins/hash.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/builtins/hash.c b/builtins/hash.c new file mode 100644 index 0000000..05e5aa9 --- /dev/null +++ b/builtins/hash.c @@ -0,0 +1,240 @@ +/* hash.c, created from hash.def. */ +#line 22 "./hash.def" + +#line 46 "./hash.def" + +#include <config.h> + +#include <stdio.h> + +#include "../bashtypes.h" + +#if defined (HAVE_UNISTD_H) +# include <unistd.h> +#endif + +#include <errno.h> + +#include "../bashansi.h" +#include "../bashintl.h" + +#include "../shell.h" +#include "../builtins.h" +#include "../flags.h" +#include "../findcmd.h" +#include "../hashcmd.h" +#include "common.h" +#include "bashgetopt.h" + +extern int posixly_correct; +extern int dot_found_in_search; +extern char *this_command_name; + +static int add_hashed_command __P((char *, int)); +static int print_hash_info __P((BUCKET_CONTENTS *)); +static int print_portable_hash_info __P((BUCKET_CONTENTS *)); +static int print_hashed_commands __P((int)); +static int list_hashed_filename_targets __P((WORD_LIST *, int)); + +/* Print statistics on the current state of hashed commands. If LIST is + not empty, then rehash (or hash in the first place) the specified + commands. */ +int +hash_builtin (list) + WORD_LIST *list; +{ + int expunge_hash_table, list_targets, list_portably, delete, opt; + char *w, *pathname; + + if (hashing_enabled == 0) + { + builtin_error (_("hashing disabled")); + return (EXECUTION_FAILURE); + } + + expunge_hash_table = list_targets = list_portably = delete = 0; + pathname = (char *)NULL; + reset_internal_getopt (); + while ((opt = internal_getopt (list, "dlp:rt")) != -1) + { + switch (opt) + { + case 'd': + delete = 1; + break; + case 'l': + list_portably = 1; + break; + case 'p': + pathname = list_optarg; + break; + case 'r': + expunge_hash_table = 1; + break; + case 't': + list_targets = 1; + break; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + /* hash -t requires at least one argument. */ + if (list == 0 && list_targets) + { + sh_needarg ("-t"); + return (EXECUTION_FAILURE); + } + + /* We want hash -r to be silent, but hash -- to print hashing info, so + we test expunge_hash_table. */ + if (list == 0 && expunge_hash_table == 0) + { + opt = print_hashed_commands (list_portably); + if (opt == 0 && posixly_correct == 0) + printf (_("%s: hash table empty\n"), this_command_name); + + return (EXECUTION_SUCCESS); + } + + if (expunge_hash_table) + phash_flush (); + + /* If someone runs `hash -r -t xyz' he will be disappointed. */ + if (list_targets) + return (list_hashed_filename_targets (list, list_portably)); + +#if defined (RESTRICTED_SHELL) + if (restricted && pathname && strchr (pathname, '/')) + { + sh_restricted (pathname); + return (EXECUTION_FAILURE); + } +#endif + + for (opt = EXECUTION_SUCCESS; list; list = list->next) + { + /* Add, remove or rehash the specified commands. */ + w = list->word->word; + if (pathname) + { + if (is_directory (pathname)) + { +#ifdef EISDIR + builtin_error ("%s: %s", pathname, strerror (EISDIR)); +#else + builtin_error (_("%s: is a directory"), pathname); +#endif + opt = EXECUTION_FAILURE; + } + else + phash_insert (w, pathname, 0, 0); + } + else if (absolute_program (w)) + continue; + else if (delete) + { + if (phash_remove (w)) + { + sh_notfound (w); + opt = EXECUTION_FAILURE; + } + } + else if (add_hashed_command (w, 0)) + opt = EXECUTION_FAILURE; + } + + fflush (stdout); + return (opt); +} + +static int +add_hashed_command (w, quiet) + char *w; + int quiet; +{ + int rv; + char *full_path; + + rv = 0; + if (find_function (w) == 0 && find_shell_builtin (w) == 0) + { + full_path = find_user_command (w); + if (full_path && executable_file (full_path)) + phash_insert (w, full_path, dot_found_in_search, 0); + else + { + if (quiet == 0) + sh_notfound (w); + rv++; + } + FREE (full_path); + } + return (rv); +} + +/* Print information about current hashed info. */ +static int +print_hash_info (item) + BUCKET_CONTENTS *item; +{ + printf ("%4d\t%s\n", item->times_found, pathdata(item)->path); + return 0; +} + +static int +print_portable_hash_info (item) + BUCKET_CONTENTS *item; +{ + printf ("builtin hash -p %s %s\n", pathdata(item)->path, item->key); + return 0; +} + +static int +print_hashed_commands (fmt) + int fmt; +{ + if (hashed_filenames == 0 || HASH_ENTRIES (hashed_filenames) == 0) + return (0); + + if (fmt == 0) + printf (_("hits\tcommand\n")); + hash_walk (hashed_filenames, fmt ? print_portable_hash_info : print_hash_info); + return (1); +} + +static int +list_hashed_filename_targets (list, fmt) + WORD_LIST *list; + int fmt; +{ + int all_found, multiple; + char *target; + WORD_LIST *l; + + all_found = 1; + multiple = list->next != 0; + + for (l = list; l; l = l->next) + { + target = phash_search (l->word->word); + if (target == 0) + { + all_found = 0; + sh_notfound (l->word->word); + continue; + } + if (fmt) + printf ("builtin hash -p %s %s\n", target, l->word->word); + else + { + if (multiple) + printf ("%s\t", l->word->word); + printf ("%s\n", target); + } + } + + return (all_found ? EXECUTION_SUCCESS : EXECUTION_FAILURE); +} |