Username table entry fits to the longest possible

TODO

@@ -7,3 +7,5 @@ show threads (/proc/%d/task/*)
 bug - bottom most process (at LINES-1, 0) only has its basename displayed
 
 fix shell-detach bug (SIGHUP?)
+
+option for clipping usernames, instead of expanding to the longest

gui.c

@@ -28,7 +28,6 @@
 
 static int pos_top = 0, pos_y = 0;
 
-
 static int  search = 0;
 static int  search_idx = 0, search_offset = 0, search_pid = 0;
 static char search_str[32] = { 0 };
@@ -147,6 +146,8 @@ void showproc(struct proc *proc, int *py, int indent)
 
 	if(y > 0){
 		extern int global_uid;
+		extern int max_unam_len, max_gnam_len;
+
 		const int owned = proc->uid == global_uid;
 		char buf[256];
 		int len = LINES;
@@ -168,11 +169,12 @@ void showproc(struct proc *proc, int *py, int indent)
 
 		len -= snprintf(buf, sizeof buf,
 				"% 7d %c "
-				"%-8s %-8s "
+				"%-*s %-*s "
 				"% 4d"
 				,
 				proc->pid, proc->state,
-				proc->unam, proc->gnam,
+				max_unam_len, proc->unam,
+				max_gnam_len, proc->gnam,
 				proc->pc_cpu
 				);
 		addstr(buf);

main.c

@@ -6,12 +6,24 @@
 
 #include "proc.h"
 #include "gui.h"
+#include "util.h"
 
 #define MS_TO_US(n) ((n) * 1000)
 
 int global_uid   = 0;
 int global_force = 0;
 
+int max_unam_len, max_gnam_len;
+
+void extra_init()
+{
+	global_uid = getuid();
+
+	/* for layout - username length */
+	max_unam_len = longest_passwd_line("/etc/passwd");
+	max_gnam_len = longest_passwd_line("/etc/group");
+}
+
 int main(int argc, char **argv)
 {
 	static struct proc **proclist;
@@ -28,8 +40,7 @@ int main(int argc, char **argv)
 			return 1;
 		}
 
-	global_uid = getuid();
-
+	extra_init();
 	gui_init();
 
 	proclist = proc_init();

util.c

@@ -114,3 +114,26 @@ int str_to_sig(const char *s)
 			return sigs[i].sig;
 	return -1;
 }
+
+int longest_passwd_line(const char *fname)
+{
+	FILE *f = fopen(fname, "r");
+	int max = 8; /* default */
+	char buf[128];
+
+	if(!f)
+		return max;
+
+	while(fgets(buf, sizeof buf, f)){
+		char *colon = strchr(buf, ':');
+		if(colon){
+			int len = colon - buf;
+			if(len > max)
+				max = len;
+		}
+	}
+
+	fclose(f);
+
+	return max;
+}

util.h

@@ -9,4 +9,6 @@ char *ustrdup(const char *s);
 
 int str_to_sig(const char *);
 
+int longest_passwd_line(const char *fname);
+
 #endif