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-rw-r--r--shell/ash.c234
1 files changed, 35 insertions, 199 deletions
diff --git a/shell/ash.c b/shell/ash.c
index e668f41e1..c7deffd08 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -2,18 +2,18 @@
/*
* ash shell port for busybox
*
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * Original BSD copyright notice is retained at the end of this file.
+ *
* Copyright (c) 1989, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Copyright (c) 1997-2005 Herbert Xu <herbert@gondor.apana.org.au>
* was re-ported from NetBSD and debianized.
*
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
- *
- * Original BSD copyright notice is retained at the end of this file.
*/
/*
@@ -34,8 +34,6 @@
#define PROFILE 0
-#define IFS_BROKEN
-
#define JOBS ENABLE_ASH_JOB_CONTROL
#if DEBUG
@@ -50,6 +48,9 @@
#include <paths.h>
#include <setjmp.h>
#include <fnmatch.h>
+
+#include "shell_common.h"
+#include "builtin_read.h"
#include "math.h"
#if ENABLE_ASH_RANDOM_SUPPORT
# include "random.h"
@@ -1737,13 +1738,6 @@ struct localvar {
# define VDYNAMIC 0
#endif
-#ifdef IFS_BROKEN
-static const char defifsvar[] ALIGN1 = "IFS= \t\n";
-#define defifs (defifsvar + 4)
-#else
-static const char defifs[] ALIGN1 = " \t\n";
-#endif
-
/* Need to be before varinit_data[] */
#if ENABLE_LOCALE_SUPPORT
@@ -1774,7 +1768,7 @@ static const struct {
const char *text;
void (*func)(const char *) FAST_FUNC;
} varinit_data[] = {
-#ifdef IFS_BROKEN
+#if IFS_BROKEN
{ VSTRFIXED|VTEXTFIXED , defifsvar , NULL },
#else
{ VSTRFIXED|VTEXTFIXED|VUNSET, "IFS\0" , NULL },
@@ -12499,211 +12493,53 @@ typedef enum __rlimit_resource rlim_t;
static int FAST_FUNC
readcmd(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
- static const char *const arg_REPLY[] = { "REPLY", NULL };
-
- char **ap;
- int backslash;
- char c;
- int rflag;
- char *prompt;
- const char *ifs;
- char *p;
- int startword;
- int status;
+ char *opt_n = NULL;
+ char *opt_p = NULL;
+ char *opt_t = NULL;
+ char *opt_u = NULL;
+ int read_flags = 0;
+ const char *r;
int i;
- int fd = 0;
-#if ENABLE_ASH_READ_NCHARS
- int nchars = 0; /* if != 0, -n is in effect */
- int silent = 0;
- struct termios tty, old_tty;
-#endif
-#if ENABLE_ASH_READ_TIMEOUT
- unsigned end_ms = 0;
- unsigned timeout = 0;
-#endif
-
- rflag = 0;
- prompt = NULL;
- while ((i = nextopt("p:u:r"
- IF_ASH_READ_TIMEOUT("t:")
- IF_ASH_READ_NCHARS("n:s")
- )) != '\0') {
+
+ while ((i = nextopt("p:u:rt:n:s")) != '\0') {
switch (i) {
case 'p':
- prompt = optionarg;
+ opt_p = optionarg;
break;
-#if ENABLE_ASH_READ_NCHARS
case 'n':
- nchars = bb_strtou(optionarg, NULL, 10);
- if (nchars < 0 || errno)
- ash_msg_and_raise_error("invalid count");
- /* nchars == 0: off (bash 3.2 does this too) */
+ opt_n = optionarg;
break;
case 's':
- silent = 1;
+ read_flags |= BUILTIN_READ_SILENT;
break;
-#endif
-#if ENABLE_ASH_READ_TIMEOUT
case 't':
- timeout = bb_strtou(optionarg, NULL, 10);
- if (errno || timeout > UINT_MAX / 2048)
- ash_msg_and_raise_error("invalid timeout");
- timeout *= 1000;
-#if 0 /* even bash have no -t N.NNN support */
- ts.tv_sec = bb_strtou(optionarg, &p, 10);
- ts.tv_usec = 0;
- /* EINVAL means number is ok, but not terminated by NUL */
- if (*p == '.' && errno == EINVAL) {
- char *p2;
- if (*++p) {
- int scale;
- ts.tv_usec = bb_strtou(p, &p2, 10);
- if (errno)
- ash_msg_and_raise_error("invalid timeout");
- scale = p2 - p;
- /* normalize to usec */
- if (scale > 6)
- ash_msg_and_raise_error("invalid timeout");
- while (scale++ < 6)
- ts.tv_usec *= 10;
- }
- } else if (ts.tv_sec < 0 || errno) {
- ash_msg_and_raise_error("invalid timeout");
- }
- if (!(ts.tv_sec | ts.tv_usec)) { /* both are 0? */
- ash_msg_and_raise_error("invalid timeout");
- }
-#endif /* if 0 */
+ opt_t = optionarg;
break;
-#endif
case 'r':
- rflag = 1;
+ read_flags |= BUILTIN_READ_RAW;
break;
case 'u':
- fd = bb_strtou(optionarg, NULL, 10);
- if (fd < 0 || errno)
- ash_msg_and_raise_error("invalid file descriptor");
+ opt_u = optionarg;
break;
default:
break;
}
}
- if (prompt && isatty(fd)) {
- out2str(prompt);
- }
- ap = argptr;
- if (*ap == NULL)
- ap = (char**)arg_REPLY;
- ifs = bltinlookup("IFS");
- if (ifs == NULL)
- ifs = defifs;
-#if ENABLE_ASH_READ_NCHARS
- tcgetattr(fd, &tty);
- old_tty = tty;
- if (nchars || silent) {
- if (nchars) {
- tty.c_lflag &= ~ICANON;
- tty.c_cc[VMIN] = nchars < 256 ? nchars : 255;
- }
- if (silent) {
- tty.c_lflag &= ~(ECHO | ECHOK | ECHONL);
- }
- /* if tcgetattr failed, tcsetattr will fail too.
- * Ignoring, it's harmless. */
- tcsetattr(fd, TCSANOW, &tty);
- }
-#endif
- status = 0;
- startword = 1;
- backslash = 0;
-#if ENABLE_ASH_READ_TIMEOUT
- if (timeout) /* NB: ensuring end_ms is nonzero */
- end_ms = ((unsigned)monotonic_ms() + timeout) | 1;
-#endif
- STARTSTACKSTR(p);
- do {
- const char *is_ifs;
-
-#if ENABLE_ASH_READ_TIMEOUT
- if (end_ms) {
- struct pollfd pfd[1];
- pfd[0].fd = fd;
- pfd[0].events = POLLIN;
- timeout = end_ms - (unsigned)monotonic_ms();
- if ((int)timeout <= 0 /* already late? */
- || safe_poll(pfd, 1, timeout) != 1 /* no? wait... */
- ) { /* timed out! */
-#if ENABLE_ASH_READ_NCHARS
- tcsetattr(fd, TCSANOW, &old_tty);
-#endif
- return 1;
- }
- }
-#endif
- if (nonblock_safe_read(fd, &c, 1) != 1) {
- status = 1;
- break;
- }
- if (c == '\0')
- continue;
- if (backslash) {
- backslash = 0;
- if (c != '\n')
- goto put;
- continue;
- }
- if (!rflag && c == '\\') {
- backslash = 1;
- continue;
- }
- if (c == '\n')
- break;
- /* $IFS splitting */
-/* http://www.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_06_05 */
- is_ifs = strchr(ifs, c);
- if (startword && is_ifs) {
- if (isspace(c))
- continue;
- /* it is a non-space ifs char */
- startword--;
- if (startword == 1) /* first one? */
- continue; /* yes, it is not next word yet */
- }
- startword = 0;
- if (ap[1] != NULL && is_ifs) {
- const char *beg;
- STACKSTRNUL(p);
- beg = stackblock();
- setvar(*ap, beg, 0);
- ap++;
- /* can we skip one non-space ifs char? (2: yes) */
- startword = isspace(c) ? 2 : 1;
- STARTSTACKSTR(p);
- continue;
- }
- put:
- STPUTC(c, p);
- }
-/* end of do {} while: */
-#if ENABLE_ASH_READ_NCHARS
- while (--nchars);
-#else
- while (1);
-#endif
+ r = builtin_read(setvar,
+ argptr,
+ bltinlookup("IFS"), /* can be NULL */
+ read_flags,
+ opt_n,
+ opt_p,
+ opt_t,
+ opt_u
+ );
-#if ENABLE_ASH_READ_NCHARS
- tcsetattr(fd, TCSANOW, &old_tty);
-#endif
+ if ((uintptr_t)r > 1)
+ ash_msg_and_raise_error(r);
- STACKSTRNUL(p);
- /* Remove trailing space ifs chars */
- while ((char *)stackblock() <= --p && isspace(*p) && strchr(ifs, *p) != NULL)
- *p = '\0';
- setvar(*ap, stackblock(), 0);
- while (*++ap != NULL)
- setvar(*ap, nullstr, 0);
- return status;
+ return (uintptr_t)r;
}
static int FAST_FUNC
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-02 01:31:17 +0000