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http://bugs.gentoo.org/301116
tweaked a little to avoid regenerating autotools
2009-07-29 Ralf Wildenhues <Ralf.Wildenhues <at> gmx.de>
* configure.in: Check for sys/user.h and linux/binfmts.h
headers.
* job.c: Include them if available.
(construct_command_argv_internal): When constructing the command
line with 'sh -c', use multiple arguments together with eval
expansion to evade the Linux per-argument length limit
MAX_ARG_STRLEN if it is defined.
Problem reported against Automake by Xan Lopez <xan <at> gnome.org>.
--- job.c.orig 2010-01-15 18:36:53.000000000 +0200
+++ job.c 2010-01-15 18:41:09.000000000 +0200
@@ -29,6 +29,15 @@
#include <string.h>
+#if defined(__linux__) /* defined (HAVE_LINUX_BINFMTS_H) && defined (HAVE_SYS_USER_H) */
+#include <sys/user.h>
+#include <unistd.h>
+#ifndef PAGE_SIZE
+#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
+#endif
+#include <linux/binfmts.h>
+#endif
+
/* Default shell to use. */
#ifdef WINDOWS32
#include <windows.h>
@@ -2697,9 +2702,19 @@
#endif
unsigned int line_len = strlen (line);
+#ifdef MAX_ARG_STRLEN
+ static char eval_line[] = "eval\\ \\\"set\\ x\\;\\ shift\\;\\ ";
+#define ARG_NUMBER_DIGITS 5
+#define EVAL_LEN (sizeof(eval_line)-1 + shell_len + 4 \
+ + (7 + ARG_NUMBER_DIGITS) * 2 * line_len / (MAX_ARG_STRLEN - 2))
+#else
+#define EVAL_LEN 0
+#endif
char *new_line = (char *) alloca (shell_len + (sizeof (minus_c) - 1)
- + (line_len * 2) + 1);
+ + (line_len*2) + 1 + EVAL_LEN);
+
char *command_ptr = NULL; /* used for batch_mode_shell mode */
+ char *args_ptr;
# ifdef __EMX__ /* is this necessary? */
if (!unixy_shell)
@@ -2712,6 +2727,30 @@
bcopy (minus_c, ap, sizeof (minus_c) - 1);
ap += sizeof (minus_c) - 1;
command_ptr = ap;
+
+#if !defined (WINDOWS32) && defined (MAX_ARG_STRLEN)
+ if (unixy_shell && line_len > MAX_ARG_STRLEN)
+ {
+ unsigned j;
+ memcpy (ap, eval_line, sizeof (eval_line) - 1);
+ ap += sizeof (eval_line) - 1;
+ for (j = 1; j <= 2 * line_len / (MAX_ARG_STRLEN - 2); j++)
+ ap += sprintf (ap, "\\$\\{%u\\}", j);
+ *ap++ = '\\';
+ *ap++ = '"';
+ *ap++ = ' ';
+ /* Copy only the first word of SHELL to $0. */
+ for (p = shell; *p != '\0'; ++p)
+ {
+ if (isspace ((unsigned char)*p))
+ break;
+ *ap++ = *p;
+ }
+ *ap++ = ' ';
+ }
+#endif
+ args_ptr = ap;
+
for (p = line; *p != '\0'; ++p)
{
if (restp != NULL && *p == '\n')
@@ -2760,6 +2799,14 @@
}
#endif
*ap++ = *p;
+
+#if !defined (WINDOWS32) && defined (MAX_ARG_STRLEN)
+ if (unixy_shell && line_len > MAX_ARG_STRLEN && (ap - args_ptr > MAX_ARG_STRLEN - 2))
+ {
+ *ap++ = ' ';
+ args_ptr = ap;
+ }
+#endif
}
if (ap == new_line + shell_len + sizeof (minus_c) - 1)
/* Line was empty. */
|
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