static void
_swrun_entry_release(netsnmp_swrun_entry * entry, void *context)
{
netsnmp_swrun_entry_free(entry);
}
/* ---------------------------------------------------------------------
*/
int
netsnmp_arch_swrun_container_load( netsnmp_container *container, u_int flags)
{
DIR *procdir = NULL;
struct dirent *procentry_p;
FILE *fp;
int pid, i;
char buf[BUFSIZ], buf2[BUFSIZ], *cp;
netsnmp_swrun_entry *entry;
procdir = opendir("/proc");
if ( NULL == procdir ) {
snmp_log( LOG_ERR, "Failed to open /proc" );
return -1;
}
/*
* Walk through the list of processes in the /proc tree
*/
while ( NULL != (procentry_p = readdir( procdir ))) {
pid = atoi( procentry_p->d_name );
if ( 0 == pid )
continue; /* Presumably '.' or '..' */
entry = netsnmp_swrun_entry_create(pid);
if (NULL == entry)
continue; /* error already logged by function */
/*
* Now extract the interesting information
* from the various /proc{PID}/ interface files
*/
/*
* Name: process name
*/
snprintf( buf2, BUFSIZ, "/proc/%d/status", pid );
fp = fopen( buf2, "r" );
if (!fp) {
netsnmp_swrun_entry_free(entry);
continue; /* file (process) probably went away */
}
memset(buf, 0, sizeof(buf));
if (fgets( buf, BUFSIZ-1, fp ) == NULL) {
fclose(fp);
netsnmp_swrun_entry_free(entry);
continue;
}
fclose(fp);
for ( cp = buf; *cp != ':'; cp++ )
;
while (isspace(*(++cp))) /* Skip ':' and following spaces */
;
entry->hrSWRunName_len = snprintf(entry->hrSWRunName,
sizeof(entry->hrSWRunName)-1, "%s", cp);
if ( '\n' == entry->hrSWRunName[ entry->hrSWRunName_len-1 ]) {
entry->hrSWRunName[ entry->hrSWRunName_len-1 ] = '\0';
entry->hrSWRunName_len--; /* Stamp on trailing newline */
}
/*
* Command Line:
* argv[0] '\0' argv[1] '\0' ....
*/
snprintf( buf2, BUFSIZ, "/proc/%d/cmdline", pid );
fp = fopen( buf2, "r" );
if (!fp) {
netsnmp_swrun_entry_free(entry);
continue; /* file (process) probably went away */
}
memset(buf, 0, sizeof(buf));
if ((cp = fgets( buf, BUFSIZ-1, fp )) == NULL) {
fclose(fp);
netsnmp_swrun_entry_free(entry);
continue;
}
fclose(fp);
if ( cp ) {
/*
* argv[0] is hrSWRunPath
*/
entry->hrSWRunPath_len = snprintf(entry->hrSWRunPath,
sizeof(entry->hrSWRunPath)-1, "%s", buf);
/*
* Stitch together argv[1..] to construct hrSWRunParameters
*/
cp = buf + entry->hrSWRunPath_len+1;
while ( 1 ) {
while (*cp)
cp++;
if ( '\0' == *(cp+1))
break; /* '\0''\0' => End of command line */
*cp = ' ';
}
entry->hrSWRunParameters_len
= sprintf(entry->hrSWRunParameters, "%.*s",
(int)sizeof(entry->hrSWRunParameters) - 1,
buf + entry->hrSWRunPath_len + 1);
} else {
memcpy(entry->hrSWRunPath, entry->hrSWRunName, entry->hrSWRunName_len);
entry->hrSWRunPath_len = entry->hrSWRunName_len;
entry->hrSWRunParameters_len = 0;
}
/*
* XXX - No information regarding system processes vs applications
*/
entry->hrSWRunType = HRSWRUNTYPE_APPLICATION;
/*
* {xxx} {xxx} STATUS {xxx}*10 UTIME STIME {xxx}*8 RSS
*/
snprintf( buf, BUFSIZ, "/proc/%d/stat", pid );
fp = fopen( buf, "r" );
if (!fp) {
netsnmp_swrun_entry_free(entry);
continue; /* file (process) probably went away */
}
if (fgets( buf, BUFSIZ-1, fp ) == NULL) {
fclose(fp);
netsnmp_swrun_entry_free(entry);
continue;
}
fclose(fp);
cp = buf;
while ( ' ' != *(cp++)) /* Skip first field */
;
while ( ' ' != *(cp++)) /* Skip second field */
;
switch (*cp) {
case 'R': entry->hrSWRunStatus = HRSWRUNSTATUS_RUNNING;
break;
case 'S': entry->hrSWRunStatus = HRSWRUNSTATUS_RUNNABLE;
break;
case 'D':
case 'T': entry->hrSWRunStatus = HRSWRUNSTATUS_NOTRUNNABLE;
break;
case 'Z':
default: entry->hrSWRunStatus = HRSWRUNSTATUS_INVALID;
break;
}
for (i=10; i; i--) { /* Skip STATUS + 10 fields */
while (' ' != *(cp++))
;
cp++;
}
entry->hrSWRunPerfCPU = atoi( cp ); /* utime */
while ( ' ' != *(cp++))
;
cp++; /* Skip utime */
entry->hrSWRunPerfCPU += atoi( cp ); /* +stime */
for (i=8; i; i--) { /* Skip stime + 8 fields */
while (' ' != *(cp++))
;
cp++;
}
entry->hrSWRunPerfMem = atoi( cp ); /* rss */
entry->hrSWRunPerfMem *= (getpagesize()/1024); /* in kB */
CONTAINER_INSERT(container, entry);
}
closedir( procdir );
DEBUGMSGTL(("swrun:load:arch"," loaded %" NETSNMP_PRIz "d entries\n",
CONTAINER_SIZE(container)));
return 0;
}