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make reusable KERN_PROCARGS2 wrapper function

This commit is contained in:
Doug MacEachern 2006-08-25 20:08:17 +00:00
parent 84dcdd1fa6
commit a0a31eb6e3
1 changed files with 47 additions and 25 deletions
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70
src/os/darwin/darwin_sigar.c
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@ -918,64 +918,86 @@ int sigar_proc_state_get(sigar_t *sigar, sigar_pid_t pid,
return SIGAR_OK; return SIGAR_OK;
} }
int sigar_proc_args_get(sigar_t *sigar, sigar_pid_t pid,
sigar_proc_args_t *procargs)
{
#if defined(DARWIN) #if defined(DARWIN)
typedef struct {
char exe[PATH_MAX+1];
char buffer[8096], *ptr, *end;
int count;
} sigar_kern_proc_args_t;
/* re-usable hack for use by proc_args and proc_env */
static int sigar_kern_proc_args_get(sigar_pid_t pid,
sigar_kern_proc_args_t *kargs)
{
/* /*
* derived from: * derived from:
* http://darwinsource.opendarwin.org/10.4.1/adv_cmds-79.1/ps.tproj/print.c * http://darwinsource.opendarwin.org/10.4.1/adv_cmds-79.1/ps.tproj/print.c
*/ */
int mib[3], nargs; int mib[3], len;
char buffer[8096], *args=buffer, *ptr, *end; size_t size = sizeof(kargs->buffer);
size_t size = sizeof(buffer); char *args = kargs->buffer;
mib[0] = CTL_KERN; mib[0] = CTL_KERN;
mib[1] = KERN_PROCARGS2; mib[1] = KERN_PROCARGS2;
mib[2] = pid; mib[2] = pid;
if (sysctl(mib, NMIB(mib), buffer, &size, NULL, 0) < 0) { if (sysctl(mib, NMIB(mib), args, &size, NULL, 0) < 0) {
return errno; return errno;
} }
end = &args[size]; kargs->end = &args[size];
memcpy(&nargs, buffer, sizeof(nargs)); memcpy(&kargs->count, args, sizeof(kargs->count));
ptr = args + sizeof(nargs); kargs->ptr = args + sizeof(kargs->count);
/* full exec path */ len = strlen(kargs->ptr);
for (; ptr < end; ptr++) { memcpy(&kargs->exe[0], kargs->ptr, len+1);
if (*ptr == '\0') { kargs->ptr += len+1;
break;
}
}
if (ptr == end) { if (kargs->ptr == kargs->end) {
return ENOENT; return ENOENT;
} }
for (; ptr < end; ptr++) { for (; kargs->ptr < kargs->end; kargs->ptr++) {
if (*ptr != '\0') { if (*kargs->ptr != '\0') {
break; /* start of argv[0] */ break; /* start of argv[0] */
} }
} }
if (ptr == end) { if (kargs->ptr == kargs->end) {
return ENOENT; return ENOENT;
} }
return SIGAR_OK;
}
#endif
int sigar_proc_args_get(sigar_t *sigar, sigar_pid_t pid,
sigar_proc_args_t *procargs)
{
#if defined(DARWIN)
int status;
sigar_kern_proc_args_t kargs;
status = sigar_kern_proc_args_get(pid, &kargs);
if (status != SIGAR_OK) {
return status;
}
sigar_proc_args_create(procargs); sigar_proc_args_create(procargs);
while ((ptr < end) && (nargs-- > 0)) { while ((kargs.ptr < kargs.end) &&
int alen = strlen(ptr)+1; (kargs.count-- > 0))
{
int alen = strlen(kargs.ptr)+1;
char *arg = malloc(alen); char *arg = malloc(alen);
SIGAR_PROC_ARGS_GROW(procargs); SIGAR_PROC_ARGS_GROW(procargs);
memcpy(arg, ptr, alen); memcpy(arg, kargs.ptr, alen);
procargs->data[procargs->number++] = arg; procargs->data[procargs->number++] = arg;
ptr += alen; kargs.ptr += alen;
} }
return SIGAR_OK; return SIGAR_OK;