Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
commands/echo.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 51 insertions(+), 1 deletions(-)
diff --git a/commands/echo.c b/commands/echo.c
index d5640a0..6f4f136 100644
--- a/commands/echo.c
+++ b/commands/echo.c
@@ -26,12 +26,59 @@
#include <fcntl.h>
#include <errno.h>
+static int my_fputs(int fd, const char *s)
+{
+ int c;
+
+ while (*s) {
+ if (*s == '\\') {
+ switch (*(s + 1)) {
+ case 0:
+ return 0;
+ case '\\':
+ c = '\\';
+ break;
+ case 'a':
+ c = '\a';
+ break;
+ case 'b':
+ c = '\b';
+ break;
+ case 'n':
+ c = '\n';
+ break;
+ case 'r':
+ c = '\r';
+ break;
+ case 't':
+ c = '\t';
+ break;
+ case 'f':
+ c = '\f';
+ break;
+ case 'e':
+ c = 0x1b;
+ break;
+ default:
+ fputc(fd, '\\');
+ c = *(s + 1);
+ }
+ s++;
+ fputc(fd, c);
+ } else
+ fputc(fd, *s);
+ s++;
+ }
+ return 0;
+}
+
static int do_echo(struct command *cmdtp, int argc, char *argv[])
{
int i, optind = 1;
int fd = stdout, opt, newline = 1;
char *file = NULL;
int oflags = O_WRONLY | O_CREAT;
+ int (*fputsfunc)(int, const char *) = fputs;
/* We can't use getopt() here because we want to
* echo all things we don't understand.
@@ -62,6 +109,9 @@ static int do_echo(struct command *cmdtp, int argc, char *argv[])
goto no_optarg_out;
optind++;
break;
+ case 'e':
+ fputsfunc = my_fputs;
+ break;
default:
goto exit_parse;
}
@@ -80,7 +130,7 @@ exit_parse:
for (i = optind; i < argc; i++) {
if (i > optind)
fputc(fd, ' ');
- fputs(fd, argv[i]);
+ fputsfunc(fd, argv[i]);
}
if (newline)
--
1.7.0
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