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-rw-r--r--miscutils/strings.c32
1 files changed, 23 insertions, 9 deletions
diff --git a/miscutils/strings.c b/miscutils/strings.c
index 9f50182..ee66496 100644
--- a/miscutils/strings.c
+++ b/miscutils/strings.c
@@ -8,13 +8,16 @@
*/
//usage:#define strings_trivial_usage
-//usage: "[-afo] [-n LEN] [FILE]..."
+//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"
-//usage: "\n -a Scan whole file (default)"
-//usage: "\n -f Precede strings with filenames"
-//usage: "\n -n LEN At least LEN characters form a string (default 4)"
-//usage: "\n -o Precede strings with decimal offsets"
+//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)"
#include "libbb.h"
@@ -22,6 +25,7 @@
#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)
@@ -33,8 +37,11 @@ int strings_main(int argc UNUSED_PARAM, char **argv)
char *string;
const char *fmt = "%s: ";
const char *n_arg = "4";
+ /* default for -o */
+ const char *radix = "o";
+ char *radix_fmt;
- getopt32(argv, "afon:", &n_arg);
+ getopt32(argv, "afon:t:", &n_arg, &radix);
/* -a is our default behaviour */
/*argc -= optind;*/
argv += optind;
@@ -43,6 +50,11 @@ int strings_main(int argc UNUSED_PARAM, char **argv)
string = xzalloc(n + 1);
n--;
+ 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;
@@ -67,8 +79,8 @@ int strings_main(int argc UNUSED_PARAM, char **argv)
if (option_mask32 & PRINT_NAME) {
printf(fmt, *argv);
}
- if (option_mask32 & PRINT_OFFSET) {
- printf("%7"OFF_FMT"o ", offset - n);
+ if (option_mask32 & (PRINT_OFFSET | PRINT_RADIX)) {
+ printf(radix_fmt, offset - n);
}
fputs(string, stdout);
}
@@ -85,8 +97,10 @@ int strings_main(int argc UNUSED_PARAM, char **argv)
fclose_if_not_stdin(file);
} while (*++argv);
- if (ENABLE_FEATURE_CLEAN_UP)
+ if (ENABLE_FEATURE_CLEAN_UP) {
free(string);
+ free(radix_fmt);
+ }
fflush_stdout_and_exit(status);
}