replace /proc scanning code by more versatile one.
Use it where appropriate.
Stop scanning /etc/passwd *for every process*!!! (uid->username)
top: reduce memory usage - we won't save unneeded fields
from /proc info anymore. Downside: ~+250 bytes of code
diff --git a/include/libbb.h b/include/libbb.h
index 7b5221d..6074331 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -501,23 +501,47 @@
#endif
#endif
typedef struct {
- int pid, ppid;
- char user[9];
- char state[4];
- unsigned long rss;
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
- unsigned pcpu;
- unsigned long stime, utime;
-#endif
+ DIR *dir;
+/* Fields are set to 0/NULL if failed to determine (or not requested) */
char *cmd;
-
- /* basename of executable file in call to exec(2),
- size from kernel headers */
- char short_cmd[COMM_LEN];
+ unsigned long rss;
+ unsigned long stime, utime;
+ unsigned pid;
+ unsigned ppid;
+ unsigned pgid;
+ unsigned sid;
+ unsigned uid;
+ unsigned gid;
+ /* basename of executable file in call to exec(2), size from */
+ /* sizeof(task_struct.comm) in /usr/include/linux/sched.h */
+ char state[4];
+ char comm[COMM_LEN];
+// user/group? - use passwd/group parsing functions
} procps_status_t;
-procps_status_t* procps_scan(int save_user_arg0);
+enum {
+ PSSCAN_PID = 1 << 0,
+ PSSCAN_PPID = 1 << 1,
+ PSSCAN_PGID = 1 << 2,
+ PSSCAN_SID = 1 << 3,
+ PSSCAN_UIDGID = 1 << 4,
+ PSSCAN_COMM = 1 << 5,
+ PSSCAN_CMD = 1 << 6,
+ PSSCAN_STATE = 1 << 7,
+ PSSCAN_RSS = 1 << 8,
+ PSSCAN_STIME = 1 << 9,
+ PSSCAN_UTIME = 1 << 10,
+ /* These are all retrieved from proc/NN/stat in one go: */
+ PSSCAN_STAT = PSSCAN_PPID | PSSCAN_PGID | PSSCAN_SID
+ | PSSCAN_COMM | PSSCAN_STATE
+ | PSSCAN_RSS | PSSCAN_STIME | PSSCAN_UTIME,
+};
+procps_status_t* alloc_procps_scan(int flags);
+void free_procps_scan(procps_status_t* sp);
+procps_status_t* procps_scan(procps_status_t* sp, int flags);
pid_t *find_pid_by_name(const char* procName);
pid_t *pidlist_reverse(pid_t *pidList);
+void clear_username_cache(void);
+const char* get_cached_username(uid_t uid);
extern const char bb_uuenc_tbl_base64[];