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Make sure every process tree is using unique shared memory. #30

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Make sure every process tree is using unique shared memory. #30

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9 changes: 6 additions & 3 deletions src/fsatrace.c
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include <windows.h>
#ifdef _MSC_VER
#include <io.h>
#define ssize_t size_t
Expand Down Expand Up @@ -103,6 +104,7 @@ main(int argc, char *const argv[])
struct shm shm;
size_t sz = 0;
char envout [PATH_MAX];
char varout [PATH_MAX];
static char buf [LOGSZ];
char *const *args = argv + 4;
unsigned nargs = argc - 4;
Expand All @@ -121,9 +123,10 @@ main(int argc, char *const argv[])
" q: dump file stat operations\n"
,argv[0]);
out = argv[2];
if ((err = shmInit(&shm, out, LOGSZ, 1)))
snprintf(varout, sizeof(varout), "%s_%ld", out, GetTickCount());
if ((err = shmInit(&shm, varout, LOGSZ, 1)))
fatal("allocating shared memory (%d)", err);
snprintf(envout, sizeof(envout), ENVOUT "=%s", out);
snprintf(envout, sizeof(envout), ENVOUT "=%s", varout);
putenv(envout);

opts = (const unsigned char *)argv[1];
Expand Down Expand Up @@ -163,7 +166,7 @@ main(int argc, char *const argv[])
if (rc) {
if (verr)
aerror(nargs, args, "command failed with code %d", rc);
}
}
if (strcmp(argv[3], "---")) {
uniq(buf, &sz, shm.buf + 4 + 256, "", 0);
dump(out, buf, sz);
Expand Down