lsscsi: new applet

[oweals/busybox.git] / miscutils / strings.c

diff --git a/miscutils/strings.c b/miscutils/strings.c
index 9a76c85346eb1550de242a0e0a16ee8a11546799..4d9bfe6901cd96f15db6daacd37b36ea10cb37b7 100644 (file)
--- a/miscutils/strings.c
+++ b/miscutils/strings.c
@@ -2,86 +2,115 @@
 /*
  * strings implementation for busybox
  *
- * Copyright Tito Ragusa <farmatito@tiscali.it>
- * 
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * Copyright 2003 Tito Ragusa <farmatito@tiscali.it>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
+//config:config STRINGS
+//config:      bool "strings"
+//config:      default y
+//config:      help
+//config:        strings prints the printable character sequences for each file
+//config:        specified.
+
+//applet:IF_STRINGS(APPLET(strings, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_STRINGS) += strings.o
 
-#include "busybox.h"
-#include <stdio.h>
-#include <stdlib.h>
-#include <getopt.h>
-#include <ctype.h>
+//usage:#define strings_trivial_usage
+//usage:       "[-fo] [-t o/d/x] [-n LEN] [FILE]..."
+//usage:#define strings_full_usage "\n\n"
+//usage:       "Display printable strings in a binary file\n"
+//We usually don't bother user with "nop" options. They work, but are not shown:
+////usage:     "\n     -a              Scan whole file (default)"
+//unimplemented alternative is -d: Only strings from initialized, loaded data sections
+//usage:     "\n       -f              Precede strings with filenames"
+//usage:     "\n       -o              Precede strings with octal offsets"
+//usage:     "\n       -t o/d/x        Precede strings with offsets in base 8/10/16"
+//usage:     "\n       -n LEN          At least LEN characters form a string (default 4)"
 
-#define WHOLE_FILE             1
-#define PRINT_NAME             2
-#define PRINT_OFFSET   4
-#define SIZE                   8
+#include "libbb.h"
 
-int strings_main(int argc, char **argv)
+#define WHOLE_FILE    1
+#define PRINT_NAME    2
+#define PRINT_OFFSET  4
+#define SIZE          8
+#define PRINT_RADIX  16
+
+int strings_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int strings_main(int argc UNUSED_PARAM, char **argv)
 {
-       int n, c, i = 0, status = EXIT_SUCCESS;
-       unsigned long opt;
-       unsigned long count;
-       FILE *file = stdin;
+       int n, c, status = EXIT_SUCCESS;
+       unsigned count;
+       off_t offset;
+       FILE *file;
        char *string;
        const char *fmt = "%s: ";
-       char *n_arg = "4";
+       const char *n_arg = "4";
+       /* default for -o */
+       const char *radix = "o";
+       char *radix_fmt;
 
-       opt = bb_getopt_ulflags(argc, argv, "afon:", &n_arg);
+       getopt32(argv, "afon:t:", &n_arg, &radix);
        /* -a is our default behaviour */
-
-       argc -= optind;
+       /*argc -= optind;*/
        argv += optind;
 
-       n = bb_xgetlarg(n_arg, 10, 1, INT_MAX);
+       n = xatou_range(n_arg, 1, INT_MAX);
        string = xzalloc(n + 1);
        n--;
 
-       if (argc == 0) {
+       if ((radix[0] != 'd' && radix[0] != 'o' && radix[0] != 'x') || radix[1] != 0)
+               bb_show_usage();
+
+       radix_fmt = xasprintf("%%7"OFF_FMT"%s ", radix);
+
+       if (!*argv) {
                fmt = "{%s}: ";
-               *argv = (char *)bb_msg_standard_input;
-               goto PIPE;
+               *--argv = (char *)bb_msg_standard_input;
        }
 
        do {
-               if ((file = bb_wfopen(*argv, "r"))) {
-PIPE:
-                       count = 0;
-                       do {
-                               c = fgetc(file);
-                               if (isprint(c) || c == '\t') {
-                                       if (i <= n) {
-                                               string[i] = c;
-                                       } else {
-                                               putchar(c);
-                                       }
-                                       if (i == n) {
-                                               if (opt & PRINT_NAME) {
+               file = fopen_or_warn_stdin(*argv);
+               if (!file) {
+                       status = EXIT_FAILURE;
+                       continue;
+               }
+               offset = 0;
+               count = 0;
+               do {
+                       c = fgetc(file);
+                       if (isprint_asciionly(c) || c == '\t') {
+                               if (count > n) {
+                                       bb_putchar(c);
+                               } else {
+                                       string[count] = c;
+                                       if (count == n) {
+                                               if (option_mask32 & PRINT_NAME) {
                                                        printf(fmt, *argv);
                                                }
-                                               if (opt & PRINT_OFFSET) {
-                                                       printf("%7lo ", count - n);
+                                               if (option_mask32 & (PRINT_OFFSET | PRINT_RADIX)) {
+                                                       printf(radix_fmt, offset - n);
                                                }
-                                               printf("%s", string);
-                                       }
-                                       i++;
-                               } else {
-                                       if (i > n) {
-                                               putchar('\n');
+                                               fputs(string, stdout);
                                        }
-                                       i = 0;
+                                       count++;
                                }
-                               count++;
-                       } while (c != EOF);
-                       bb_fclose_nonstdin(file);
-               } else {
-                       status = EXIT_FAILURE;
-               }
-       } while (--argc > 0);
+                       } else {
+                               if (count > n) {
+                                       bb_putchar('\n');
+                               }
+                               count = 0;
+                       }
+                       offset++;
+               } while (c != EOF);
+               fclose_if_not_stdin(file);
+       } while (*++argv);
 
-       if (ENABLE_FEATURE_CLEAN_UP)
+       if (ENABLE_FEATURE_CLEAN_UP) {
                free(string);
+               free(radix_fmt);
+       }
 
-       bb_fflush_stdout_and_exit(status);
+       fflush_stdout_and_exit(status);
 }