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133 lines
2.8 KiB
C
133 lines
2.8 KiB
C
/* echo.c, created from echo.def. */
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#line 22 "./echo.def"
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#include "config.h"
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#include "bashansi.h"
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#include <stdio.h>
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#include "shell.h"
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#include "common.h"
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#line 73 "./echo.def"
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#line 88 "./echo.def"
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#if defined (V9_ECHO)
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# define VALID_ECHO_OPTIONS "neE"
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#else /* !V9_ECHO */
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# define VALID_ECHO_OPTIONS "n"
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#endif /* !V9_ECHO */
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/* System V machines already have a /bin/sh with a v9 behaviour. We
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give Bash the identical behaviour for these machines so that the
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existing system shells won't barf. Regrettably, the SUS v2 has
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standardized the Sys V echo behavior. This variable is external
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so that we can have a `shopt' variable to control it at runtime. */
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#if defined (DEFAULT_ECHO_TO_XPG) || defined (STRICT_POSIX)
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int xpg_echo = 1;
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#else
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int xpg_echo = 0;
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#endif /* DEFAULT_ECHO_TO_XPG */
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/* Print the words in LIST to standard output. If the first word is
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`-n', then don't print a trailing newline. We also support the
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echo syntax from Version 9 Unix systems. */
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int
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echo_builtin (list)
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WORD_LIST *list;
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{
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int display_return, do_v9, i, len;
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char *temp, *s;
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do_v9 = xpg_echo;
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display_return = 1;
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if (posixly_correct && xpg_echo)
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goto just_echo;
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for (; list && (temp = list->word->word) && *temp == '-'; list = list->next)
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{
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/* If it appears that we are handling options, then make sure that
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all of the options specified are actually valid. Otherwise, the
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string should just be echoed. */
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temp++;
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for (i = 0; temp[i]; i++)
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{
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if (strchr (VALID_ECHO_OPTIONS, temp[i]) == 0)
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break;
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}
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/* echo - and echo -<nonopt> both mean to just echo the arguments. */
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if (*temp == 0 || temp[i])
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break;
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/* All of the options in TEMP are valid options to ECHO.
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Handle them. */
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while (i = *temp++)
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{
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switch (i)
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{
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case 'n':
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display_return = 0;
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break;
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#if defined (V9_ECHO)
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case 'e':
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do_v9 = 1;
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break;
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case 'E':
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do_v9 = 0;
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break;
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#endif /* V9_ECHO */
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default:
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goto just_echo; /* XXX */
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}
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}
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}
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just_echo:
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clearerr (stdout); /* clear error before writing and testing success */
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while (list)
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{
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i = len = 0;
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temp = do_v9 ? ansicstr (list->word->word, STRLEN (list->word->word), 1, &i, &len)
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: list->word->word;
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if (temp)
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{
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if (do_v9)
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{
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for (s = temp; len > 0; len--)
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putchar (*s++);
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}
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else
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printf ("%s", temp);
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#if defined (SunOS5)
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fflush (stdout); /* Fix for bug in SunOS 5.5 printf(3) */
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#endif
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}
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QUIT;
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if (do_v9 && temp)
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free (temp);
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list = list->next;
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if (i)
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{
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display_return = 0;
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break;
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}
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if (list)
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putchar(' ');
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QUIT;
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}
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if (display_return)
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putchar ('\n');
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return (sh_chkwrite (EXECUTION_SUCCESS));
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}
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