|
|
bb9a7e |
diff --git a/config.h.in b/config.h.in
|
|
|
bb9a7e |
index ab316d4..11d1d68 100644
|
|
|
bb9a7e |
--- a/config.h.in
|
|
|
bb9a7e |
+++ b/config.h.in
|
|
|
bb9a7e |
@@ -775,6 +775,9 @@
|
|
|
bb9a7e |
/* Define if you have the pselect function. */
|
|
|
bb9a7e |
#undef HAVE_PSELECT
|
|
|
bb9a7e |
|
|
|
bb9a7e |
+/* Define if you have the pread function. */
|
|
|
bb9a7e |
+#undef HAVE_PREAD
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
/* Define if you have the putenv function. */
|
|
|
bb9a7e |
#undef HAVE_PUTENV
|
|
|
bb9a7e |
|
|
|
bb9a7e |
@@ -981,6 +984,9 @@
|
|
|
bb9a7e |
/* Define if you have the <dlfcn.h> header file. */
|
|
|
bb9a7e |
#undef HAVE_DLFCN_H
|
|
|
bb9a7e |
|
|
|
bb9a7e |
+/* Define if you have the <elf.h> header file. */
|
|
|
bb9a7e |
+#undef HAVE_ELF_H
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
/* Define if you have the <grp.h> header file. */
|
|
|
bb9a7e |
#undef HAVE_GRP_H
|
|
|
bb9a7e |
|
|
|
bb9a7e |
diff --git a/configure.ac b/configure.ac
|
|
|
bb9a7e |
index 2fe3e7d..f1b7f1b 100644
|
|
|
bb9a7e |
--- a/configure.ac
|
|
|
bb9a7e |
+++ b/configure.ac
|
|
|
bb9a7e |
@@ -827,7 +827,7 @@ dnl checks for system calls
|
|
|
bb9a7e |
AC_CHECK_FUNCS(dup2 eaccess fcntl getdtablesize getentropy getgroups \
|
|
|
bb9a7e |
gethostname getpagesize getpeername getrandom getrlimit \
|
|
|
bb9a7e |
getrusage gettimeofday kill killpg lstat pselect readlink \
|
|
|
bb9a7e |
- select setdtablesize setitimer tcgetpgrp uname ulimit waitpid)
|
|
|
bb9a7e |
+ select setdtablesize setitimer tcgetpgrp uname ulimit waitpid pread)
|
|
|
bb9a7e |
AC_REPLACE_FUNCS(rename)
|
|
|
bb9a7e |
|
|
|
bb9a7e |
dnl checks for c library functions
|
|
|
bb9a7e |
diff --git a/execute_cmd.c b/execute_cmd.c
|
|
|
bb9a7e |
index d2a0dd7..d2555ad 100644
|
|
|
bb9a7e |
--- a/execute_cmd.c
|
|
|
bb9a7e |
+++ b/execute_cmd.c
|
|
|
bb9a7e |
@@ -41,6 +41,10 @@
|
|
|
bb9a7e |
# include <unistd.h>
|
|
|
bb9a7e |
#endif
|
|
|
bb9a7e |
|
|
|
bb9a7e |
+#ifdef HAVE_ELF_H
|
|
|
bb9a7e |
+# include <elf.h>
|
|
|
bb9a7e |
+#endif
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
#include "posixtime.h"
|
|
|
bb9a7e |
|
|
|
bb9a7e |
#if defined (HAVE_SYS_RESOURCE_H) && !defined (RLIMTYPE)
|
|
|
bb9a7e |
@@ -5832,6 +5836,14 @@ shell_execve (command, args, env)
|
|
|
bb9a7e |
{
|
|
|
bb9a7e |
/* The file has the execute bits set, but the kernel refuses to
|
|
|
bb9a7e |
run it for some reason. See why. */
|
|
|
bb9a7e |
+#if defined (HAVE_HASH_BANG_EXEC) || defined (HAVE_ELF_H)
|
|
|
bb9a7e |
+ int fd = open (command, O_RDONLY);
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ if (fd >= 0)
|
|
|
bb9a7e |
+ sample_len = read (fd, sample, sizeof (sample));
|
|
|
bb9a7e |
+ else
|
|
|
bb9a7e |
+ sample_len = -1;
|
|
|
bb9a7e |
+#endif
|
|
|
bb9a7e |
#if defined (HAVE_HASH_BANG_EXEC)
|
|
|
bb9a7e |
READ_SAMPLE_BUF (command, sample, sample_len);
|
|
|
bb9a7e |
if (sample_len > 0)
|
|
|
bb9a7e |
@@ -5841,6 +5853,7 @@ shell_execve (command, args, env)
|
|
|
bb9a7e |
char *interp;
|
|
|
bb9a7e |
int ilen;
|
|
|
bb9a7e |
|
|
|
bb9a7e |
+ close (fd);
|
|
|
bb9a7e |
interp = getinterp (sample, sample_len, (int *)NULL);
|
|
|
bb9a7e |
ilen = strlen (interp);
|
|
|
bb9a7e |
errno = i;
|
|
|
bb9a7e |
@@ -5856,7 +5869,138 @@ shell_execve (command, args, env)
|
|
|
bb9a7e |
return (EX_NOEXEC);
|
|
|
bb9a7e |
}
|
|
|
bb9a7e |
#endif
|
|
|
bb9a7e |
- errno = i;
|
|
|
bb9a7e |
+#if defined (HAVE_ELF_H)
|
|
|
bb9a7e |
+ if (i == ENOENT
|
|
|
bb9a7e |
+ && sample_len > EI_NIDENT
|
|
|
bb9a7e |
+ && memcmp (sample, ELFMAG, SELFMAG) == 0)
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ off_t offset = -1;
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ /* It is an ELF file. Now determine whether it is dynamically
|
|
|
bb9a7e |
+ linked and if yes, get the offset of the interpreter
|
|
|
bb9a7e |
+ string. */
|
|
|
bb9a7e |
+ if (sample[EI_CLASS] == ELFCLASS32
|
|
|
bb9a7e |
+ && sample_len > sizeof (Elf32_Ehdr))
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ Elf32_Ehdr ehdr;
|
|
|
bb9a7e |
+ Elf32_Phdr *phdr;
|
|
|
bb9a7e |
+ int nphdr;
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ /* We have to copy the data since the sample buffer
|
|
|
bb9a7e |
+ might not be aligned correctly to be accessed as
|
|
|
bb9a7e |
+ an Elf32_Ehdr struct. */
|
|
|
bb9a7e |
+ memcpy (&ehdr, sample, sizeof (Elf32_Ehdr));
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ nphdr = ehdr.e_phnum;
|
|
|
bb9a7e |
+ phdr = (Elf32_Phdr *) malloc (nphdr * ehdr.e_phentsize);
|
|
|
bb9a7e |
+ if (phdr != NULL)
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+#ifdef HAVE_PREAD
|
|
|
bb9a7e |
+ sample_len = pread (fd, phdr, nphdr * ehdr.e_phentsize,
|
|
|
bb9a7e |
+ ehdr.e_phoff);
|
|
|
bb9a7e |
+#else
|
|
|
bb9a7e |
+ if (lseek (fd, ehdr.e_phoff, SEEK_SET) != -1)
|
|
|
bb9a7e |
+ sample_len = read (fd, phdr,
|
|
|
bb9a7e |
+ nphdr * ehdr.e_phentsize);
|
|
|
bb9a7e |
+ else
|
|
|
bb9a7e |
+ sample_len = -1;
|
|
|
bb9a7e |
+#endif
|
|
|
bb9a7e |
+ if (sample_len == nphdr * ehdr.e_phentsize)
|
|
|
bb9a7e |
+ while (nphdr-- > 0)
|
|
|
bb9a7e |
+ if (phdr[nphdr].p_type == PT_INTERP)
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ offset = phdr[nphdr].p_offset;
|
|
|
bb9a7e |
+ break;
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+ free (phdr);
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+ else if (sample[EI_CLASS] == ELFCLASS64
|
|
|
bb9a7e |
+ && sample_len > sizeof (Elf64_Ehdr))
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ Elf64_Ehdr ehdr;
|
|
|
bb9a7e |
+ Elf64_Phdr *phdr;
|
|
|
bb9a7e |
+ int nphdr;
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ /* We have to copy the data since the sample buffer
|
|
|
bb9a7e |
+ might not be aligned correctly to be accessed as
|
|
|
bb9a7e |
+ an Elf64_Ehdr struct. */
|
|
|
bb9a7e |
+ memcpy (&ehdr, sample, sizeof (Elf64_Ehdr));
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ nphdr = ehdr.e_phnum;
|
|
|
bb9a7e |
+ phdr = (Elf64_Phdr *) malloc (nphdr * ehdr.e_phentsize);
|
|
|
bb9a7e |
+ if (phdr != NULL)
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+#ifdef HAVE_PREAD
|
|
|
bb9a7e |
+ sample_len = pread (fd, phdr, nphdr * ehdr.e_phentsize,
|
|
|
bb9a7e |
+ ehdr.e_phoff);
|
|
|
bb9a7e |
+#else
|
|
|
bb9a7e |
+ if (lseek (fd, ehdr.e_phoff, SEEK_SET) != -1)
|
|
|
bb9a7e |
+ sample_len = read (fd, phdr,
|
|
|
bb9a7e |
+ nphdr * ehdr.e_phentsize);
|
|
|
bb9a7e |
+ else
|
|
|
bb9a7e |
+ sample_len = -1;
|
|
|
bb9a7e |
+#endif
|
|
|
bb9a7e |
+ if (sample_len == nphdr * ehdr.e_phentsize)
|
|
|
bb9a7e |
+ while (nphdr-- > 0)
|
|
|
bb9a7e |
+ if (phdr[nphdr].p_type == PT_INTERP)
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ offset = phdr[nphdr].p_offset;
|
|
|
bb9a7e |
+ break;
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+ free (phdr);
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ if (offset != -1)
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ size_t maxlen = 0;
|
|
|
bb9a7e |
+ size_t actlen = 0;
|
|
|
bb9a7e |
+ char *interp = NULL;
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ do
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ if (actlen == maxlen)
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ char *newinterp = realloc (interp, maxlen += 200);
|
|
|
bb9a7e |
+ if (newinterp == NULL)
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ actlen = 0;
|
|
|
bb9a7e |
+ break;
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+ interp = newinterp;
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+#ifdef HAVE_PREAD
|
|
|
bb9a7e |
+ actlen = pread (fd, interp, maxlen, offset);
|
|
|
bb9a7e |
+#else
|
|
|
bb9a7e |
+ if (lseek (fd, offset, SEEK_SET) != -1)
|
|
|
bb9a7e |
+ actlen = read (fd, interp, maxlen);
|
|
|
bb9a7e |
+ else
|
|
|
bb9a7e |
+ actlen = -1;
|
|
|
bb9a7e |
+#endif
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+ while (actlen > 0 && memchr (interp, '\0', actlen) == NULL);
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ if (actlen > 0)
|
|
|
bb9a7e |
+ {
|
|
|
bb9a7e |
+ close (fd);
|
|
|
bb9a7e |
+ errno = i;
|
|
|
bb9a7e |
+ sys_error ("%s: %s: bad ELF interpreter", command,
|
|
|
bb9a7e |
+ interp);
|
|
|
bb9a7e |
+ free (interp);
|
|
|
bb9a7e |
+ return (EX_NOEXEC);
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ free (interp);
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+ }
|
|
|
bb9a7e |
+#endif
|
|
|
bb9a7e |
+#if defined (HAVE_HASH_BANG_EXEC) || defined (HAVE_ELF_H)
|
|
|
bb9a7e |
+ close (fd);
|
|
|
bb9a7e |
+#endif
|
|
|
bb9a7e |
+
|
|
|
bb9a7e |
+ errno = i;
|
|
|
bb9a7e |
file_error (command);
|
|
|
bb9a7e |
}
|
|
|
bb9a7e |
return (last_command_exit_value);
|