1 files changed, 137 insertions, 0 deletions

diff --git a/libbb/procps.c b/libbb/procps.c
new file mode 100644
index 000000000..9ac5be092
--- /dev/null
+++ b/libbb/procps.c
@@ -0,0 +1,137 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright 1998 by Albert Cahalan; all rights reserved.
+ * Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
+ * GNU Library General Public License Version 2, or any later version
+ *
+ */
+
+#include "libbb.h"
+
+#if ! defined CONFIG_FEATURE_USE_DEVPS_PATCH
+#include <dirent.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <asm/page.h>
+
+
+extern procps_status_t * procps_scan(int save_user_arg0)
+{
+        static DIR *dir;
+        struct dirent *entry;
+        static procps_status_t ret_status;
+        char *name;
+        int n;
+        char status[32];
+        char buf[1024];
+        FILE *fp;
+        procps_status_t curstatus;
+        int pid;
+        long tasknice;
+        struct stat sb;
+
+        if (!dir) {
+                dir = opendir("/proc");
+                if(!dir)
+                        error_msg_and_die("Can't open /proc");
+        }
+        for(;;) {
+                if((entry = readdir(dir)) == NULL) {
+                        closedir(dir);
+                        dir = 0;
+                        return 0;
+                }
+                name = entry->d_name;
+                if (!(*name >= '0' && *name <= '9'))
+                        continue;
+
+                memset(&curstatus, 0, sizeof(procps_status_t));
+                pid = atoi(name);
+                curstatus.pid = pid;
+
+                sprintf(status, "/proc/%d/stat", pid);
+                if((fp = fopen(status, "r")) == NULL)
+                        continue;
+                if(fstat(fileno(fp), &sb))
+                        continue;
+                my_getpwuid(curstatus.user, sb.st_uid);
+                name = fgets(buf, sizeof(buf), fp);
+                fclose(fp);
+                if(name == NULL)
+                        continue;
+                name = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
+                if(name == 0 || name[1] != ' ')
+                        continue;
+                *name = 0;
+                sscanf(buf, "%*s (%15c", curstatus.short_cmd);
+                n = sscanf(name+2,
+                "%c %d "
+                "%*s %*s %*s %*s "     /* pgrp, session, tty, tpgid */
+                "%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
+#ifdef FEATURE_CPU_USAGE_PERCENTAGE
+                "%lu %lu "
+#else
+                "%*s %*s "
+#endif
+                "%*s %*s %*s "         /* cutime, cstime, priority */
+                "%ld "
+                "%*s %*s %*s "         /* timeout, it_real_value, start_time */
+                "%*s "                 /* vsize */
+                "%ld",
+                curstatus.state, &curstatus.ppid,
+#ifdef FEATURE_CPU_USAGE_PERCENTAGE
+                &curstatus.utime, &curstatus.stime,
+#endif
+                &tasknice,
+                &curstatus.rss);
+#ifdef FEATURE_CPU_USAGE_PERCENTAGE
+                if(n != 6)
+#else
+                if(n != 4)
+#endif
+                        continue;
+
+                if (curstatus.rss == 0 && curstatus.state[0] != 'Z')
+                        curstatus.state[1] = 'W';
+                else
+                        curstatus.state[1] = ' ';
+                if (tasknice < 0)
+                        curstatus.state[2] = '<';
+                else if (tasknice > 0)
+                        curstatus.state[2] = 'N';
+                else
+                        curstatus.state[2] = ' ';
+
+                curstatus.rss <<= (PAGE_SHIFT - 10);     /* 2**10 = 1kb */
+
+                sprintf(status, "/proc/%d/cmdline", pid);
+                if(save_user_arg0) {
+                        if((fp = fopen(status, "r")) == NULL)
+                                continue;
+                        if(fgets(buf, sizeof(buf), fp) != NULL) {
+                                name = strchr(buf, '\n');
+                                if(name != NULL)
+                                        *name = 0;
+                                if(buf[0])
+                                        curstatus.cmd = strdup(buf);
+                                /* if NULL it work true also */
+                        }
+                        fclose(fp);
+                }
+                return memcpy(&ret_status, &curstatus, sizeof(procps_status_t));
+        }
+}
+
+#endif /* CONFIG_FEATURE_USE_DEVPS_PATCH. Else this file is empty */
+
+/* END CODE */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/