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A lot of changes were suggested by Chris.

Browse Source 
ExecveHandler.c:
* Use "" instead of <> for LLVM include files
* Use raw I/O, we don't need buffering
* Set errno = 0 before using open()
* strlen() doesn't count NULL terminator in its size
* Use memcmp() instead of strcmp()
* Return result of the real execve(), not 0
* Search for path to bytecode file if not absolute/relative path

SysUtils.c:
* Convert all comments to C-style
* Stop using `bool', use `unsigned' instead

SysUtils.h:
* Stop using `bool', use `unsigned' instead
* Updated comment to FindExecutable()

README.txt:
* Describe the goal of LLEE and an application


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7911 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman
2003-08-15 23:31:16 +00:00
parent a1ee42ac8e
commit 593ece0050
4 changed files with 58 additions and 40 deletions
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24
tools/llee/SysUtils.c
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@@ -15,16 +15,17 @@
#include <stdlib.h>
#include <string.h>
/// isExecutableFile - This function returns true if the filename specified
/// exists and is executable.
///
bool isExecutableFile(const char *ExeFileName) {
/*
* isExecutableFile - This function returns true if the filename specified
* exists and is executable.
*/
unsigned isExecutableFile(const char *ExeFileName) {
struct stat Buf;
if (stat(ExeFileName, &Buf))
return false; // Must not be executable!
return 0; // Must not be executable!
if (!(Buf.st_mode & S_IFREG))
return false; // Not a regular file?
return 0; // Not a regular file?
if (Buf.st_uid == getuid()) // Owner of file?
return Buf.st_mode & S_IXUSR;
@@ -34,15 +35,16 @@ bool isExecutableFile(const char *ExeFileName) {
return Buf.st_mode & S_IXOTH;
}
/// FindExecutable - Find a named executable in the directories listed in $PATH.
/// If the executable cannot be found, returns NULL.
///
/*
* FindExecutable - Find a named executable in the directories listed in $PATH.
* If the executable cannot be found, returns NULL.
*/
char *FindExecutable(const char *ExeName) {
/* Try to find the executable in the path */
const char *PathStr = getenv("PATH");
if (PathStr == 0) return "";
// Now we have a colon separated list of directories to search... try them...
/* Now we have a colon separated list of directories to search, try them. */
unsigned PathLen = strlen(PathStr);
while (PathLen) {
/* Find the next colon */
@@ -76,6 +78,6 @@ char *FindExecutable(const char *ExeName) {
++Colon;
}
// If we fell out, we ran out of directories in PATH to search, return failure
/* If we fell out, we ran out of directories to search, return failure. */
return NULL;
}