summaryrefslogtreecommitdiffstats
path: root/cpukit/libmisc/shell/main_rm.c
diff options
context:
space:
mode:
Diffstat (limited to 'cpukit/libmisc/shell/main_rm.c')
-rw-r--r--cpukit/libmisc/shell/main_rm.c709
1 files changed, 709 insertions, 0 deletions
diff --git a/cpukit/libmisc/shell/main_rm.c b/cpukit/libmisc/shell/main_rm.c
new file mode 100644
index 0000000000..465a0daf46
--- /dev/null
+++ b/cpukit/libmisc/shell/main_rm.c
@@ -0,0 +1,709 @@
+/*-
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if 0
+#ifndef lint
+static const char copyright[] =
+"@(#) Copyright (c) 1990, 1993, 1994\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)rm.c 8.5 (Berkeley) 4/18/94";
+#endif /* not lint */
+#endif
+#if 0
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/bin/rm/rm.c,v 1.58 2006/10/31 02:22:36 delphij Exp $");
+#endif
+
+#include <rtems.h>
+#include <rtems/shell.h>
+#include <rtems/shellconfig.h>
+#define __need_getopt_newlib
+#include <getopt.h>
+
+#include <sys/stat.h>
+#include <sys/param.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <fts.h>
+#include <grp.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define rindex(s,c) strrchr(s,c)
+
+/* RTEMS specific changes */
+typedef struct {
+ int dflag, eval, fflag, iflag, Pflag, vflag, Wflag, stdin_ok;
+ int rflag, Iflag;
+ uid_t uid;
+ int exit_code;
+ jmp_buf exit_jmp;
+} rtems_shell_rm_globals;
+
+#define dflag globals->dflag
+#define eval globals->eval
+#define fflag globals->fflag
+#define iflag globals->iflag
+#define Pflag globals->Pflag
+#define vflag globals->vflag
+#define Wflag globals->Wflag
+#define stdin_ok globals->stdin_ok
+#define rflag globals->rflag
+#define Iflag globals->Iflag
+#define xuid globals->uid
+#define exit_jump &(globals->exit_jmp)
+
+#include <setjmp.h>
+
+#define exit(ec) rtems_shell_rm_exit(globals, ec)
+void
+rtems_shell_rm_exit (rtems_shell_rm_globals* globals, int code)
+{
+ globals->exit_code = code;
+ longjmp (globals->exit_jmp, 1);
+}
+
+static int main_rm(rtems_shell_rm_globals* globals, int argc, char *argv[]);
+
+int
+rtems_shell_main_rm(int argc, char *argv[])
+{
+ rtems_shell_rm_globals rm_globals;
+ memset (&rm_globals, 0, sizeof (rm_globals));
+ rm_globals.exit_code = 1;
+ if (setjmp (rm_globals.exit_jmp) == 0)
+ return main_rm (&rm_globals, argc, argv);
+ return rm_globals.exit_code;
+}
+
+#define check(a1, a2, a3) check_rm(globals, a1, a2, a3)
+#define check2(a1) check2_rm(globals, a1)
+#define checkdot(a1) checkdot_rm(globals, a1)
+#define checkslash(a1) checkslash_rm(globals, a1)
+#define rm_file(a1) rm_file_rm(globals, a1)
+#define rm_overwrite(a1, a2) rm_overwrite_rm(globals, a1, a2)
+#define rm_tree(a1) rm_tree_rm(globals, a1)
+#define usage() usage_rm(globals)
+
+
+/* RTEMS changes */
+
+static int check_rm(rtems_shell_rm_globals* globals, char *, char *, struct stat *);
+static int check2_rm(rtems_shell_rm_globals* globals, char **);
+static void checkdot_rm(rtems_shell_rm_globals* globals, char **);
+static void checkslash_rm(rtems_shell_rm_globals* globals, char **);
+static void rm_file_rm(rtems_shell_rm_globals* globals, char **);
+static int rm_overwrite_rm(rtems_shell_rm_globals* globals, char *, struct stat *);
+static void rm_tree_rm(rtems_shell_rm_globals* globals, char **);
+static void usage_rm(rtems_shell_rm_globals* globals);
+
+/*
+ * rm --
+ * This rm is different from historic rm's, but is expected to match
+ * POSIX 1003.2 behavior. The most visible difference is that -f
+ * has two specific effects now, ignore non-existent files and force
+ * file removal.
+ */
+int
+main_rm(rtems_shell_rm_globals* globals, int argc, char *argv[])
+{
+ int ch;
+ char *p;
+
+ struct getopt_data getopt_reent;
+ memset(&getopt_reent, 0, sizeof(getopt_data));
+
+ /*
+ * Test for the special case where the utility is called as
+ * "unlink", for which the functionality provided is greatly
+ * simplified.
+ */
+ if ((p = rindex(argv[0], '/')) == NULL)
+ p = argv[0];
+ else
+ ++p;
+ if (strcmp(p, "unlink") == 0) {
+ while (getopt_r(argc, argv, "", &getopt_reent) != -1)
+ usage();
+ argc -= getopt_reent.optind;
+ argv += getopt_reent.optind;
+ if (argc != 1)
+ usage();
+ rm_file(&argv[0]);
+ exit(eval);
+ }
+
+ Pflag = rflag = 0;
+ while ((ch = getopt_r(argc, argv, "dfiIPRrvW", &getopt_reent)) != -1)
+ switch(ch) {
+ case 'd':
+ dflag = 1;
+ break;
+ case 'f':
+ fflag = 1;
+ iflag = 0;
+ break;
+ case 'i':
+ fflag = 0;
+ iflag = 1;
+ break;
+ case 'I':
+ Iflag = 1;
+ break;
+ case 'P':
+ Pflag = 1;
+ break;
+ case 'R':
+ case 'r': /* Compatibility. */
+ rflag = 1;
+ break;
+ case 'v':
+ vflag = 1;
+ break;
+ case 'W':
+ Wflag = 1;
+ break;
+ default:
+ usage();
+ }
+ argc -= getopt_reent.optind;
+ argv += getopt_reent.optind;
+
+ if (argc < 1) {
+ if (fflag)
+ return (0);
+ usage();
+ }
+
+ checkdot(argv);
+ if (getenv("POSIXLY_CORRECT") == NULL)
+ checkslash(argv);
+ xuid = geteuid();
+
+ if (*argv) {
+ stdin_ok = isatty(STDIN_FILENO);
+
+ if (Iflag) {
+ if (check2(argv) == 0)
+ exit (1);
+ }
+ if (rflag)
+ rm_tree(argv);
+ else
+ rm_file(argv);
+ }
+
+ exit (eval);
+ return 0;
+}
+
+void
+rm_tree_rm(rtems_shell_rm_globals* globals, char **argv)
+{
+ FTS *fts;
+ FTSENT *p;
+ int needstat;
+ int flags;
+ int rval;
+
+ /*
+ * Remove a file hierarchy. If forcing removal (-f), or interactive
+ * (-i) or can't ask anyway (stdin_ok), don't stat the file.
+ */
+ needstat = !xuid || (!fflag && !iflag && stdin_ok);
+
+ /*
+ * If the -i option is specified, the user can skip on the pre-order
+ * visit. The fts_number field flags skipped directories.
+ */
+#define SKIPPED 1
+
+ flags = FTS_PHYSICAL;
+ if (!needstat)
+ flags |= FTS_NOSTAT;
+ if (Wflag)
+ flags |= FTS_WHITEOUT;
+ if (!(fts = fts_open(argv, flags, NULL))) {
+ if (fflag && errno == ENOENT)
+ return;
+ err(exit_jump, 1, "fts_open");
+ }
+ while ((p = fts_read(fts)) != NULL) {
+ switch (p->fts_info) {
+ case FTS_DNR:
+ if (!fflag || p->fts_errno != ENOENT) {
+ warnx("%s: %s",
+ p->fts_path, strerror(p->fts_errno));
+ eval = 1;
+ }
+ continue;
+ case FTS_ERR:
+ errx(exit_jump, 1, "%s: %s", p->fts_path, strerror(p->fts_errno));
+ case FTS_NS:
+ /*
+ * Assume that since fts_read() couldn't stat the
+ * file, it can't be unlinked.
+ */
+ if (!needstat)
+ break;
+ if (!fflag || p->fts_errno != ENOENT) {
+ warnx("%s: %s",
+ p->fts_path, strerror(p->fts_errno));
+ eval = 1;
+ }
+ continue;
+ case FTS_D:
+ /* Pre-order: give user chance to skip. */
+ if (!fflag && !check(p->fts_path, p->fts_accpath,
+ p->fts_statp)) {
+ (void)fts_set(fts, p, FTS_SKIP);
+ p->fts_number = SKIPPED;
+ }
+#if RTEMS_REMOVED
+ else if (!xuid &&
+ (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
+ !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
+ chflags(p->fts_accpath,
+ p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE)) < 0)
+ goto err;
+#endif
+ continue;
+ case FTS_DP:
+ /* Post-order: see if user skipped. */
+ if (p->fts_number == SKIPPED)
+ continue;
+ break;
+ default:
+ if (!fflag &&
+ !check(p->fts_path, p->fts_accpath, p->fts_statp))
+ continue;
+ }
+
+ rval = 0;
+#if RTEMS_REMOVED
+ if (!xuid &&
+ (p->fts_statp->st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
+ !(p->fts_statp->st_flags & (SF_APPEND|SF_IMMUTABLE)))
+ rval = chflags(p->fts_accpath,
+ p->fts_statp->st_flags &= ~(UF_APPEND|UF_IMMUTABLE));
+#endif
+ if (rval == 0) {
+ /*
+ * If we can't read or search the directory, may still be
+ * able to remove it. Don't print out the un{read,search}able
+ * message unless the remove fails.
+ */
+ switch (p->fts_info) {
+ case FTS_DP:
+ case FTS_DNR:
+ rval = rmdir(p->fts_accpath);
+ if (rval == 0 || (fflag && errno == ENOENT)) {
+ if (rval == 0 && vflag)
+ (void)printf("%s\n",
+ p->fts_path);
+ continue;
+ }
+ break;
+
+#if RTEMS_REMOVED
+ case FTS_W:
+ rval = undelete(p->fts_accpath);
+ if (rval == 0 && (fflag && errno == ENOENT)) {
+ if (vflag)
+ (void)printf("%s\n",
+ p->fts_path);
+ continue;
+ }
+ break;
+#endif
+
+ case FTS_NS:
+ /*
+ * Assume that since fts_read() couldn't stat
+ * the file, it can't be unlinked.
+ */
+ if (fflag)
+ continue;
+ /* FALLTHROUGH */
+ default:
+ if (Pflag)
+ if (!rm_overwrite(p->fts_accpath, NULL))
+ continue;
+ rval = unlink(p->fts_accpath);
+ if (rval == 0 || (fflag && errno == ENOENT)) {
+ if (rval == 0 && vflag)
+ (void)printf("%s\n",
+ p->fts_path);
+ continue;
+ }
+ }
+ }
+#if RTEMS_REMOVED
+err:
+#endif
+ warn("%s", p->fts_path);
+ eval = 1;
+ }
+ if (errno)
+ err(exit_jump, 1, "fts_read");
+ fts_close(fts);
+}
+
+#define S_ISWHT(m) (0)
+
+void
+rm_file_rm(rtems_shell_rm_globals* globals, char **argv)
+{
+ struct stat sb;
+ int rval;
+ char *f;
+
+ /*
+ * Remove a file. POSIX 1003.2 states that, by default, attempting
+ * to remove a directory is an error, so must always stat the file.
+ */
+ while ((f = *argv++) != NULL) {
+ /* Assume if can't stat the file, can't unlink it. */
+ if (lstat(f, &sb)) {
+#if RTEMS_REMOVED
+ if (Wflag) {
+ sb.st_mode = S_IFWHT|S_IWUSR|S_IRUSR;
+ } else {
+#endif
+ if (!fflag || errno != ENOENT) {
+ warn("%s", f);
+ eval = 1;
+ }
+ continue;
+#if RTEMS_REMOVED
+ }
+#endif
+ } else if (Wflag) {
+ warnx("%s: %s", f, strerror(EEXIST));
+ eval = 1;
+ continue;
+ }
+
+ if (S_ISDIR(sb.st_mode) && !dflag) {
+ warnx("%s: is a directory", f);
+ eval = 1;
+ continue;
+ }
+ if (!fflag && !S_ISWHT(sb.st_mode) && !check(f, f, &sb))
+ continue;
+ rval = 0;
+#if RTEMS_REMOVED
+ if (!xuid && !S_ISWHT(sb.st_mode) &&
+ (sb.st_flags & (UF_APPEND|UF_IMMUTABLE)) &&
+ !(sb.st_flags & (SF_APPEND|SF_IMMUTABLE)))
+ rval = chflags(f, sb.st_flags & ~(UF_APPEND|UF_IMMUTABLE));
+#endif
+ if (rval == 0) {
+ if (S_ISWHT(sb.st_mode))
+#if RTEMS_REMOVED
+ rval = undelete(f);
+#endif
+ ;
+ else if (S_ISDIR(sb.st_mode))
+ rval = rmdir(f);
+ else {
+ if (Pflag)
+ if (!rm_overwrite(f, &sb))
+ continue;
+ rval = unlink(f);
+ }
+ }
+ if (rval && (!fflag || errno != ENOENT)) {
+ warn("%s", f);
+ eval = 1;
+ }
+ if (vflag && rval == 0)
+ (void)printf("%s\n", f);
+ }
+}
+
+/*
+ * rm_overwrite --
+ * Overwrite the file 3 times with varying bit patterns.
+ *
+ * XXX
+ * This is a cheap way to *really* delete files. Note that only regular
+ * files are deleted, directories (and therefore names) will remain.
+ * Also, this assumes a fixed-block file system (like FFS, or a V7 or a
+ * System V file system). In a logging file system, you'll have to have
+ * kernel support.
+ */
+int
+rm_overwrite_rm(rtems_shell_rm_globals* globals, char *file, struct stat *sbp)
+{
+ struct stat sb;
+#if RTEMS_REMOVED
+ struct statfs fsb;
+#endif
+ off_t len;
+ int bsize, fd, wlen;
+ char *buf = NULL;
+
+ fd = -1;
+ if (sbp == NULL) {
+ if (lstat(file, &sb))
+ goto err;
+ sbp = &sb;
+ }
+ if (!S_ISREG(sbp->st_mode))
+ return (1);
+ if (sbp->st_nlink > 1 && !fflag) {
+ warnx("%s (inode %lu): not overwritten due to multiple links",
+ file, sbp->st_ino);
+ return (0);
+ }
+ if ((fd = open(file, O_WRONLY, 0)) == -1)
+ goto err;
+#if RTEMS_REMOVED
+ if (fstatfs(fd, &fsb) == -1)
+ goto err;
+ bsize = MAX(fsb.f_iosize, 1024);
+#endif
+ bsize = 1024;
+ if ((buf = malloc(bsize)) == NULL)
+ err(exit_jump, 1, "%s: malloc", file);
+
+#define PASS(byte) { \
+ memset(buf, byte, bsize); \
+ for (len = sbp->st_size; len > 0; len -= wlen) { \
+ wlen = len < bsize ? len : bsize; \
+ if (write(fd, buf, wlen) != wlen) \
+ goto err; \
+ } \
+}
+ PASS(0xff);
+ if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
+ goto err;
+ PASS(0x00);
+ if (fsync(fd) || lseek(fd, (off_t)0, SEEK_SET))
+ goto err;
+ PASS(0xff);
+ if (!fsync(fd) && !close(fd)) {
+ free(buf);
+ return (1);
+ }
+
+err: eval = 1;
+ if (buf)
+ free(buf);
+ if (fd != -1)
+ close(fd);
+ warn("%s", file);
+ return (0);
+}
+
+void strmode(mode_t mode, char *p);
+char *fflagstostr(u_long flags);
+const char *user_from_uid(uid_t uid, int nouser);
+
+int
+check_rm(rtems_shell_rm_globals* globals, char *path, char *name, struct stat *sp)
+{
+ int ch, first;
+ char modep[15], *flagsp;
+
+ /* Check -i first. */
+ if (iflag)
+ (void)fprintf(stderr, "remove %s? ", path);
+ else {
+ /*
+ * If it's not a symbolic link and it's unwritable and we're
+ * talking to a terminal, ask. Symbolic links are excluded
+ * because their permissions are meaningless. Check stdin_ok
+ * first because we may not have stat'ed the file.
+ */
+#if RTEMS_REMOVED
+ if (!stdin_ok || S_ISLNK(sp->st_mode) ||
+ (!access(name, W_OK) &&
+ !(sp->st_flags & (SF_APPEND|SF_IMMUTABLE)) &&
+ (!(sp->st_flags & (UF_APPEND|UF_IMMUTABLE)) || !xuid)))
+#endif
+ if (!stdin_ok || S_ISLNK(sp->st_mode) ||
+ (!access(name, W_OK)))
+ return (1);
+ strmode(sp->st_mode, modep);
+#if RTEMS_REMOVED
+ if ((flagsp = fflagstostr(sp->st_flags)) == NULL)
+ err(exit_jump, 1, "fflagstostr");
+#else
+ flagsp = "no supported";
+#endif
+ if (Pflag)
+ errx(exit_jump, 1,
+ "%s: -P was specified, but file is not writable",
+ path);
+ (void)fprintf(stderr, "override %s%s%s/%s %s%sfor %s? ",
+ modep + 1, modep[9] == ' ' ? "" : " ",
+ user_from_uid(sp->st_uid, 0),
+ group_from_gid(sp->st_gid, 0),
+ *flagsp ? flagsp : "", *flagsp ? " " : "",
+ path);
+#if RTEMS_REMOVED
+ free(flagsp);
+#endif
+ }
+ (void)fflush(stderr);
+
+ first = ch = getchar();
+ while (ch != '\n' && ch != EOF)
+ ch = getchar();
+ return (first == 'y' || first == 'Y');
+}
+
+#define ISSLASH(a) ((a)[0] == '/' && (a)[1] == '\0')
+void
+checkslash_rm(rtems_shell_rm_globals* globals, char **argv)
+{
+ char **t, **u;
+ int complained;
+
+ complained = 0;
+ for (t = argv; *t;) {
+ if (ISSLASH(*t)) {
+ if (!complained++)
+ warnx("\"/\" may not be removed");
+ eval = 1;
+ for (u = t; u[0] != NULL; ++u)
+ u[0] = u[1];
+ } else {
+ ++t;
+ }
+ }
+}
+
+int
+check2_rm(rtems_shell_rm_globals* globals, char **argv)
+{
+ struct stat st;
+ int first;
+ int ch;
+ int fcount = 0;
+ int dcount = 0;
+ int i;
+ const char *dname = NULL;
+
+ for (i = 0; argv[i]; ++i) {
+ if (lstat(argv[i], &st) == 0) {
+ if (S_ISDIR(st.st_mode)) {
+ ++dcount;
+ dname = argv[i]; /* only used if 1 dir */
+ } else {
+ ++fcount;
+ }
+ }
+ }
+ first = 0;
+ while (first != 'n' && first != 'N' && first != 'y' && first != 'Y') {
+ if (dcount && rflag) {
+ fprintf(stderr, "recursively remove");
+ if (dcount == 1)
+ fprintf(stderr, " %s", dname);
+ else
+ fprintf(stderr, " %d dirs", dcount);
+ if (fcount == 1)
+ fprintf(stderr, " and 1 file");
+ else if (fcount > 1)
+ fprintf(stderr, " and %d files", fcount);
+ } else if (dcount + fcount > 3) {
+ fprintf(stderr, "remove %d files", dcount + fcount);
+ } else {
+ return(1);
+ }
+ fprintf(stderr, "? ");
+ fflush(stderr);
+
+ first = ch = getchar();
+ while (ch != '\n' && ch != EOF)
+ ch = getchar();
+ if (ch == EOF)
+ break;
+ }
+ return (first == 'y' || first == 'Y');
+}
+
+#define ISDOT(a) ((a)[0] == '.' && (!(a)[1] || ((a)[1] == '.' && !(a)[2])))
+void
+checkdot_rm(rtems_shell_rm_globals* globals, char **argv)
+{
+ char *p, **save, **t;
+ int complained;
+
+ complained = 0;
+ for (t = argv; *t;) {
+ if ((p = strrchr(*t, '/')) != NULL)
+ ++p;
+ else
+ p = *t;
+ if (ISDOT(p)) {
+ if (!complained++)
+ warnx("\".\" and \"..\" may not be removed");
+ eval = 1;
+ for (save = t; (t[0] = t[1]) != NULL; ++t)
+ continue;
+ t = save;
+ } else
+ ++t;
+ }
+}
+
+void
+usage_rm(rtems_shell_rm_globals* globals)
+{
+
+ (void)fprintf(stderr, "%s\n%s\n",
+ "usage: rm [-f | -i] [-dIPRrvW] file ...",
+ " unlink file");
+ exit(1);
+}
+
+rtems_shell_cmd_t rtems_shell_RM_Command = {
+ "rm", /* name */
+ "[-f | -i] [-dIPRrvW] file ...", /* usage */
+ "files", /* topic */
+ rtems_shell_main_rm, /* command */
+ NULL, /* alias */
+ NULL /* next */
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 10:26:11 +0000