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/* echo.c, created from echo.def. */
#line 22 "./echo.def"
#include <config.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include "../bashansi.h"
#include <stdio.h>
#include "../shell.h"
#include "common.h"
#line 67 "./echo.def"
#line 82 "./echo.def"
#if defined (V9_ECHO)
# define VALID_ECHO_OPTIONS "neE"
#else /* !V9_ECHO */
# define VALID_ECHO_OPTIONS "n"
#endif /* !V9_ECHO */
/* System V machines already have a /bin/sh with a v9 behaviour. We
give Bash the identical behaviour for these machines so that the
existing system shells won't barf. Regrettably, the SUS v2 has
standardized the Sys V echo behavior. This variable is external
so that we can have a `shopt' variable to control it at runtime. */
#if defined (DEFAULT_ECHO_TO_XPG) || defined (STRICT_POSIX)
int xpg_echo = 1;
#else
int xpg_echo = 0;
#endif /* DEFAULT_ECHO_TO_XPG */
extern int posixly_correct;
/* Print the words in LIST to standard output. If the first word is
`-n', then don't print a trailing newline. We also support the
echo syntax from Version 9 Unix systems. */
int
echo_builtin (list)
WORD_LIST *list;
{
int display_return, do_v9, i, len;
char *temp, *s;
do_v9 = xpg_echo;
display_return = 1;
if (posixly_correct && xpg_echo)
goto just_echo;
for (; list && (temp = list->word->word) && *temp == '-'; list = list->next)
{
/* If it appears that we are handling options, then make sure that
all of the options specified are actually valid. Otherwise, the
string should just be echoed. */
temp++;
for (i = 0; temp[i]; i++)
{
if (strchr (VALID_ECHO_OPTIONS, temp[i]) == 0)
break;
}
/* echo - and echo -<nonopt> both mean to just echo the arguments. */
if (*temp == 0 || temp[i])
break;
/* All of the options in TEMP are valid options to ECHO.
Handle them. */
while (i = *temp++)
{
switch (i)
{
case 'n':
display_return = 0;
break;
#if defined (V9_ECHO)
case 'e':
do_v9 = 1;
break;
case 'E':
do_v9 = 0;
break;
#endif /* V9_ECHO */
default:
goto just_echo; /* XXX */
}
}
}
just_echo:
clearerr (stdout); /* clear error before writing and testing success */
terminate_immediately++;
while (list)
{
i = len = 0;
temp = do_v9 ? ansicstr (list->word->word, STRLEN (list->word->word), 1, &i, &len)
: list->word->word;
if (temp)
{
if (do_v9)
{
for (s = temp; len > 0; len--)
putchar (*s++);
}
else
printf ("%s", temp);
#if defined (SunOS5)
fflush (stdout); /* Fix for bug in SunOS 5.5 printf(3) */
#endif
}
if (do_v9 && temp)
free (temp);
list = list->next;
if (i)
{
display_return = 0;
break;
}
if (list)
putchar(' ');
}
if (display_return)
putchar ('\n');
terminate_immediately--;
return (sh_chkwrite (EXECUTION_SUCCESS));
}
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