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execve(): find executable first in COKERNEL_PATH and then in PATH if executable name is not absolute

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bgerofi@riken.jp
2014-07-28 22:09:54 +09:00
committed by Balazs Gerofi bgerofi@riken.jp
parent e5d3407d8e
commit f1e39f5fb2
1 changed files with 45 additions and 23 deletions
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68
executer/user/mcexec.c
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@ -1221,8 +1221,8 @@ int main_loop(int fd, int cpu, pthread_mutex_t *lock)
int ret = -1;
struct program_load_desc *desc;
struct remote_transfer trans;
FILE *fp;
int status;
int error;
int found = 0;
char path[2048];
char *filename;
@ -1232,37 +1232,59 @@ int main_loop(int fd, int cpu, pthread_mutex_t *lock)
filename = (char *)w.sr.args[1];
/* Is filename without path? */
if (0 && strncmp(filename, "/", 1)
//&& strncmp(filename, ".", 1)
) {
if (strncmp(filename, "/", 1)
&& strncmp(filename, ".", 1)) {
char *token, *string, *tofree;
char *PATH = getenv("COKERNEL_PATH");
if (!PATH) {
PATH = getenv("PATH");
}
__dprintf("PATH: %s\n", PATH);
char *PATH = getenv("PATH");
fprintf(stderr, "PATH: %s\n", PATH);
/* Open command for reading. */
sprintf(path, "/usr/bin/which %s", filename);
fp = popen(path, "r");
if (fp == NULL) {
fprintf(stderr, "execve(): failed to run which\n" );
/* strsep() modifies string! */
tofree = string = strdup(PATH);
if (string == NULL) {
printf("error: copying PATH, not enough memory?\n");
goto return_execve1;
}
/* Read the output a line at a time - output it. */
if (fgets(path, sizeof(path)-1, fp) == NULL) {
fprintf(stderr, "execve(): failed to read which\n" );
pclose(fp);
goto return_execve1;
while ((token = strsep(&string, ":")) != NULL) {
error = snprintf(path, sizeof(path),
"%s/%s", token, filename);
if (error < 0 || error >= sizeof(path)) {
fprintf(stderr, "execve(): array too small?\n");
continue;
}
error = access(path, X_OK);
if (!error) {
found = 1;
break;
}
}
/* close */
pclose(fp);
free(tofree);
}
else {
sprintf(path, "%s", filename);
error = snprintf(path, sizeof(path), "%s", filename);
if (error < 0 || error >= sizeof(path)) {
fprintf(stderr, "execve(): array too small?\n");
goto return_execve1;
}
found = 1;
}
if (!found) {
fprintf(stderr,
"execve(): error finding file %s\n", path);
goto return_execve1;
}
__dprintf("execve: filename: %s\n", filename);
__dprintf("execve: LD_LIBRARY_PATH: %s\n", getenv("LD_LIBRARY_PATH") ? getenv("LD_LIBRARY_PATH") : "(empty)");
__dprintf("execve(): path to binary: %s\n", path);
if (load_elf_desc(path, &desc) != 0) {
fprintf(stderr,