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Diffstat (limited to 'examples/loadables/rm.c')
| -rw-r--r-- | examples/loadables/rm.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/examples/loadables/rm.c b/examples/loadables/rm.c new file mode 100644 index 0000000..d8d1522 --- /dev/null +++ b/examples/loadables/rm.c @@ -0,0 +1,185 @@ +/* rm - remove files and directories with -r */ + +/* See Makefile for compilation details. */ + +/* + Copyright (C) 2016 Free Software Foundation, Inc. + + This file is part of GNU Bash. + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "config.h" + +#include <stdio.h> +#include <errno.h> +#include <dirent.h> +#include "builtins.h" +#include "shell.h" +#include "common.h" +#include "bashgetopt.h" + +#if !defined (errno) +extern int errno; +#endif + +static int rm_file(const char *fname); + +static int force, recursive; + +static int +_remove_directory(const char *dirname) +{ + DIR *dir; + struct dirent *dp; + size_t dirlen; + int err; + + dirlen = strlen (dirname); + err = 0; + + if ((dir = opendir(dirname))) + { + while ((dp = readdir(dir))) + { +#ifdef __GNUC__ + char fname[dirlen + 1 + strlen (dp->d_name) + 1]; +#else + char *fname; + int fnsize; +#endif + + QUIT; + if (*dp->d_name == '.' && (dp->d_name[1] == 0 || (dp->d_name[1] == '.' && dp->d_name[2] == 0))) + continue; + +#ifdef __GNUC__ + snprintf(fname, sizeof (fname), "%s/%s", dirname, dp->d_name); +#else + fnsize = dirlen + 1 + strlen (dp->d_name) + 1; + fname = xmalloc (fnsize); + snprintf(fname, fnsize, "%s/%s", dirname, dp->d_name); +#endif + + if (rm_file (fname) && force == 0) + err = 1; +#ifndef __GNUC__ + free (fname); +#endif + QUIT; + } + + closedir(dir); + + if (err == 0 && rmdir (dirname) && force == 0) + err = 1; + } + else if (force == 0) + err = 1; + + if (err) + builtin_error ("%s: %s", dirname, strerror (errno)); + + return err; +} + +static int +rm_file(const char *fname) +{ + if (unlink (fname) == 0) + return 0; + + QUIT; + /* If FNAME is a directory glibc returns EISDIR but correct POSIX value + would be EPERM. If we get that error and FNAME is a directory and -r + was supplied, recursively remove the directory and its contents */ + if ((errno == EISDIR || errno == EPERM) && recursive && file_isdir (fname)) + return _remove_directory(fname); + else if (force) + return 0; + + builtin_error ("%s: %s", fname, strerror (errno)); + return 1; +} + +int +rm_builtin (list) + WORD_LIST *list; +{ + const char *name; + WORD_LIST *l; + int rval, opt; + + recursive = force = 0; + rval = EXECUTION_SUCCESS; + + reset_internal_getopt (); + while ((opt = internal_getopt (list, "Rrfi")) != -1) + { + switch (opt) + { + case 'R': + case 'r': + recursive = 1; + break; + case 'f': + force = 1; + break; + case 'i': + return (EX_DISKFALLBACK); + CASE_HELPOPT; + default: + builtin_usage (); + return (EX_USAGE); + } + } + list = loptend; + + if (list == 0) + { + if (force == 0) + { + builtin_usage (); + return (EXECUTION_FAILURE); + } + return (EXECUTION_SUCCESS); + } + + for (l = list; l; l = l->next) + { + QUIT; + if (rm_file(l->word->word) && force == 0) + rval = EXECUTION_FAILURE; + } + + return rval; +} + +char *rm_doc[] = { + "Remove files.", + "", + "rm removes the files specified as arguments.", + (char *)NULL +}; + +/* The standard structure describing a builtin command. bash keeps an array + of these structures. */ +struct builtin rm_struct = { + "rm", /* builtin name */ + rm_builtin, /* function implementing the builtin */ + BUILTIN_ENABLED, /* initial flags for builtin */ + rm_doc, /* array of long documentation strings. */ + "rm [-rf] file ...", /* usage synopsis; becomes short_doc */ + 0 /* reserved for internal use */ +}; |