Made ps work. Fixed some stuff.

Makefile

@@ -5,7 +5,7 @@ BUILDTIME=$(shell date "+%Y%m%d-%H%M")
 
 # Comment out the following to make a debuggable build
 # Leave this off for production use.
-DODEBUG=true
+#DODEBUG=true
 
 #This will choke on a non-debian system
 ARCH=`uname -m | sed -e 's/i.86/i386/' | sed -e 's/sparc.*/sparc/'`

busybox.def.h

@@ -21,7 +21,7 @@
 #define BB_GREP
 #define BB_HALT
 #define BB_INIT
-//#define BB_KILL   // Supplied by ash
+#define BB_KILL
 //#define BB_LENGTH
 #define BB_LN
 #define BB_LOADFONT

chmod_chown_chgrp.c

@@ -48,56 +48,6 @@ static const char chmod_usage[] = "[-R] MODE[,MODE]... FILE...\n"
  "\t-R\tchange files and directories recursively.\n";
 
 
-uid_t my_getid(const char *filename, const char *name) 
-{
-	FILE *stream;
-	char *rname, *start, *end, buf[128];
-	uid_t rid;
-
-	stream=fopen(filename,"r");
-
-	while (fgets (buf, 128, stream) != NULL) {
-		if (buf[0] == '#')
-			continue;
-
-		start = buf;
-		end = strchr (start, ':');
-		if (end == NULL)
-			continue;
-		*end = '\0';
-		rname = start;
-
-		start = end + 1;
-		end = strchr (start, ':');
-		if (end == NULL)
-			continue;
-
-		start = end + 1;
-		rid = (uid_t) strtol (start, &end, 10);
-		if (end == start)
-			continue;
-
-		if (name) {
-		    if (0 == strcmp(rname, name))
-			return( rid);
-		}
-	}
-	fclose(stream);
-	return (-1);
-}
-
-uid_t 
-my_getpwnam(char *name) 
-{
-    return my_getid("/etc/passwd", name);
-}
-
-gid_t 
-my_getgrnam(char *name) 
-{
-    return my_getid("/etc/group", name);
-}
-
 static int fileAction(const char *fileName, struct stat* statbuf)
 {
     switch (whichApp) {

init.c

@@ -194,19 +194,6 @@ set_free_pages()
     fclose(f);
 }
 
-static int
-get_kernel_revision()
-{
-  FILE *f;
-  int major=0, minor=0, patch=0;
-
-  f = fopen("/proc/sys/kernel/osrelease","r");
-  fscanf(f,"%d.%d.%d",&major,&minor,&patch);
-  fclose(f);
-  return major*65536 + minor*256 + patch;
-}
-
-
 static void
 shutdown_system(void)
 {

init/init.c

@@ -194,19 +194,6 @@ set_free_pages()
     fclose(f);
 }
 
-static int
-get_kernel_revision()
-{
-  FILE *f;
-  int major=0, minor=0, patch=0;
-
-  f = fopen("/proc/sys/kernel/osrelease","r");
-  fscanf(f,"%d.%d.%d",&major,&minor,&patch);
-  fclose(f);
-  return major*65536 + minor*256 + patch;
-}
-
-
 static void
 shutdown_system(void)
 {

internal.h

@@ -138,6 +138,12 @@ extern void createPath (const char *name, int mode);
 extern int parse_mode( const char* s, mode_t* theMode);
 extern volatile void usage(const char *usage);
 
+extern uid_t my_getpwnam(char *name);
+extern gid_t my_getgrnam(char *name); 
+extern void my_getpwuid(char* name, uid_t uid);
+extern void my_getgrgid(char* group, gid_t gid);
+extern int get_kernel_revision();
+
 
 
 #if defined (BB_FSCK_MINIX) || defined (BB_MKFS_MINIX)

procps/ps.c

@@ -23,16 +23,82 @@
 #include <unistd.h>
 #include <dirent.h>
 #include <stdio.h>
+#include <fcntl.h>
+#include <ctype.h>
+
+
+typedef struct proc_s {
+    char
+    	cmd[16];	/* basename of executable file in call to exec(2) */
+    int
+        ruid, rgid,     /* real only (sorry) */
+    	pid,		/* process id */
+    	ppid;		/* pid of parent process */
+    char
+    	state;		/* single-char code for process state (S=sleeping) */
+} proc_t;
+
+
+
+static int file2str(char *filename, char *ret, int cap) 
+{
+    int fd, num_read;
+
+    if ( (fd       = open(filename, O_RDONLY, 0)) == -1 ) return -1;
+    if ( (num_read = read(fd, ret, cap - 1))      <= 0 ) return -1;
+    ret[num_read] = 0;
+    close(fd);
+    return num_read;
+}
+
+
+static void parse_proc_status(char* S, proc_t* P) 
+{
+    char* tmp;
+    memset(P->cmd, 0, sizeof P->cmd);
+    sscanf (S, "Name:\t%15c", P->cmd);
+    tmp = strchr(P->cmd,'\n');
+    if (tmp)
+	*tmp='\0';
+    tmp = strstr (S,"State");
+    sscanf (tmp, "State:\t%c", &P->state);
+
+    tmp = strstr (S,"Pid:");
+    if(tmp) sscanf (tmp,
+        "Pid:\t%d\n"
+        "PPid:\t%d\n",
+        &P->pid,
+        &P->ppid
+    );
+    else fprintf(stderr, "Internal error!\n");
+
+    /* For busybox, ignoring effecting, saved, etc */
+    tmp = strstr (S,"Uid:");
+    if(tmp) sscanf (tmp,
+        "Uid:\t%d", &P->ruid);
+    else fprintf(stderr, "Internal error!\n");
+
+    tmp = strstr (S,"Gid:");
+    if(tmp) sscanf (tmp,
+        "Gid:\t%d", &P->rgid);
+    else fprintf(stderr, "Internal error!\n");
+
+}
 
 
 extern int ps_main(int argc, char **argv)
 {
+    proc_t p;
     DIR *dir;
     FILE *file;
     struct dirent *entry;
+    char path[32], sbuf[512];
+    char uidName[10]="";
+    char groupName[10]="";
+    int i, c;
 
     if ( argc>1 && **(argv+1) == '-' ) {
-	usage ("ps\n");
+	usage ("ps - report process status\nThis version of ps accepts no options.\n");
     }
     
     dir = opendir("/proc");
@@ -41,28 +107,44 @@ extern int ps_main(int argc, char **argv)
 	exit(FALSE);
     }
 
-    fprintf(stdout, "PID\tUid\tGid\tState\tName\n");
+    fprintf(stdout, "%5s  %-8s %-3s %5s %s\n", "PID", "Uid", "Gid", "State", "Command");
     while ((entry = readdir(dir)) != NULL) {
-	char psStatus[NAME_MAX];
-	char psName[NAME_MAX]="";
-	char psState[NAME_MAX]="";
-	int psPID=0, psPPID=0, psUid=0, psGid=0;
-	//if (match(entry->d_name, "[0-9]") == FALSE)
-	//    continue;
-	sprintf(psStatus, "/proc/%s/status", entry->d_name);
-	file = fopen( psStatus, "r");
-	if (file == NULL) {
-	    continue;
-	    //perror(psStatus);
-	    //exit( FALSE);
-	}
-	fscanf(file, "Name:\t%s\nState:\t%s\nPid:\t%d\nPPid:\t%d\nUid:\t%d\nGid:\t%d", 
-		psName, psState, &psPID, &psPPID, &psUid, &psGid);
-	fclose(file);
+	uidName[0]='\0';
+	groupName[0]='\0';
 		
-	fprintf(stdout, "%d\t%d\t%d\t%s\t%s\n", psPID, psUid, psGid, psState, psName);
+	if (! isdigit(*entry->d_name))
+	    continue;
+	sprintf(path, "/proc/%s/status", entry->d_name);
+	if ((file2str(path, sbuf, sizeof sbuf)) != -1 ) {
+	    parse_proc_status(sbuf, &p);
+	}
+
+	/* Make some adjustments as needed */
+	my_getpwuid( uidName, p.ruid);
+	my_getgrgid( groupName, p.rgid);
+	if (*uidName == '\0')
+	    sprintf( uidName, "%d", p.ruid);
+	if (*groupName == '\0')
+	    sprintf( groupName, "%d", p.rgid);
+
+	fprintf(stdout, "%5d %-8s %-8s %c ", p.pid, uidName, groupName, p.state);
+	sprintf(path, "/proc/%s/cmdline", entry->d_name);
+	file = fopen(path, "r");
+	if (file == NULL) {
+	    perror(path);
+	    exit(FALSE);
+	}
+	i=0;
+	while (((c = getc(file)) != EOF) && (i < 53)) {
+	    i++;
+	    if (c == '\0')
+		c = ' ';
+	    putc(c, stdout);
+	}
+	if (i==0)
+	    fprintf(stdout, "%s", p.cmd);
+	fprintf(stdout, "\n");
     }
     closedir(dir);
     exit(TRUE);
 }
-

ps.c

@@ -23,16 +23,82 @@
 #include <unistd.h>
 #include <dirent.h>
 #include <stdio.h>
+#include <fcntl.h>
+#include <ctype.h>
+
+
+typedef struct proc_s {
+    char
+    	cmd[16];	/* basename of executable file in call to exec(2) */
+    int
+        ruid, rgid,     /* real only (sorry) */
+    	pid,		/* process id */
+    	ppid;		/* pid of parent process */
+    char
+    	state;		/* single-char code for process state (S=sleeping) */
+} proc_t;
+
+
+
+static int file2str(char *filename, char *ret, int cap) 
+{
+    int fd, num_read;
+
+    if ( (fd       = open(filename, O_RDONLY, 0)) == -1 ) return -1;
+    if ( (num_read = read(fd, ret, cap - 1))      <= 0 ) return -1;
+    ret[num_read] = 0;
+    close(fd);
+    return num_read;
+}
+
+
+static void parse_proc_status(char* S, proc_t* P) 
+{
+    char* tmp;
+    memset(P->cmd, 0, sizeof P->cmd);
+    sscanf (S, "Name:\t%15c", P->cmd);
+    tmp = strchr(P->cmd,'\n');
+    if (tmp)
+	*tmp='\0';
+    tmp = strstr (S,"State");
+    sscanf (tmp, "State:\t%c", &P->state);
+
+    tmp = strstr (S,"Pid:");
+    if(tmp) sscanf (tmp,
+        "Pid:\t%d\n"
+        "PPid:\t%d\n",
+        &P->pid,
+        &P->ppid
+    );
+    else fprintf(stderr, "Internal error!\n");
+
+    /* For busybox, ignoring effecting, saved, etc */
+    tmp = strstr (S,"Uid:");
+    if(tmp) sscanf (tmp,
+        "Uid:\t%d", &P->ruid);
+    else fprintf(stderr, "Internal error!\n");
+
+    tmp = strstr (S,"Gid:");
+    if(tmp) sscanf (tmp,
+        "Gid:\t%d", &P->rgid);
+    else fprintf(stderr, "Internal error!\n");
+
+}
 
 
 extern int ps_main(int argc, char **argv)
 {
+    proc_t p;
     DIR *dir;
     FILE *file;
     struct dirent *entry;
+    char path[32], sbuf[512];
+    char uidName[10]="";
+    char groupName[10]="";
+    int i, c;
 
     if ( argc>1 && **(argv+1) == '-' ) {
-	usage ("ps\n");
+	usage ("ps - report process status\nThis version of ps accepts no options.\n");
     }
     
     dir = opendir("/proc");
@@ -41,28 +107,44 @@ extern int ps_main(int argc, char **argv)
 	exit(FALSE);
     }
 
-    fprintf(stdout, "PID\tUid\tGid\tState\tName\n");
+    fprintf(stdout, "%5s  %-8s %-3s %5s %s\n", "PID", "Uid", "Gid", "State", "Command");
     while ((entry = readdir(dir)) != NULL) {
-	char psStatus[NAME_MAX];
-	char psName[NAME_MAX]="";
-	char psState[NAME_MAX]="";
-	int psPID=0, psPPID=0, psUid=0, psGid=0;
-	//if (match(entry->d_name, "[0-9]") == FALSE)
-	//    continue;
-	sprintf(psStatus, "/proc/%s/status", entry->d_name);
-	file = fopen( psStatus, "r");
-	if (file == NULL) {
-	    continue;
-	    //perror(psStatus);
-	    //exit( FALSE);
-	}
-	fscanf(file, "Name:\t%s\nState:\t%s\nPid:\t%d\nPPid:\t%d\nUid:\t%d\nGid:\t%d", 
-		psName, psState, &psPID, &psPPID, &psUid, &psGid);
-	fclose(file);
+	uidName[0]='\0';
+	groupName[0]='\0';
 		
-	fprintf(stdout, "%d\t%d\t%d\t%s\t%s\n", psPID, psUid, psGid, psState, psName);
+	if (! isdigit(*entry->d_name))
+	    continue;
+	sprintf(path, "/proc/%s/status", entry->d_name);
+	if ((file2str(path, sbuf, sizeof sbuf)) != -1 ) {
+	    parse_proc_status(sbuf, &p);
+	}
+
+	/* Make some adjustments as needed */
+	my_getpwuid( uidName, p.ruid);
+	my_getgrgid( groupName, p.rgid);
+	if (*uidName == '\0')
+	    sprintf( uidName, "%d", p.ruid);
+	if (*groupName == '\0')
+	    sprintf( groupName, "%d", p.rgid);
+
+	fprintf(stdout, "%5d %-8s %-8s %c ", p.pid, uidName, groupName, p.state);
+	sprintf(path, "/proc/%s/cmdline", entry->d_name);
+	file = fopen(path, "r");
+	if (file == NULL) {
+	    perror(path);
+	    exit(FALSE);
+	}
+	i=0;
+	while (((c = getc(file)) != EOF) && (i < 53)) {
+	    i++;
+	    if (c == '\0')
+		c = ' ';
+	    putc(c, stdout);
+	}
+	if (i==0)
+	    fprintf(stdout, "%s", p.cmd);
+	fprintf(stdout, "\n");
     }
     closedir(dir);
     exit(TRUE);
 }
-

utility.c

@@ -42,6 +42,27 @@ volatile void usage(const char *usage)
 }
 
 
+#if defined (BB_INIT) || defined (BB_PS)
+
+/* Returns kernel version encoded as major*65536 + minor*256 + patch,
+ * so, for example,  to check if the kernel is greater than 2.2.11:
+ *	if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
+ */
+int
+get_kernel_revision()
+{
+  FILE *f;
+  int major=0, minor=0, patch=0;
+
+  f = fopen("/proc/sys/kernel/osrelease","r");
+  fscanf(f,"%d.%d.%d",&major,&minor,&patch);
+  fclose(f);
+  return major*65536 + minor*256 + patch;
+}
+
+#endif
+
+
 
 #if defined (BB_CP) || defined (BB_MV)
 /*
@@ -659,4 +680,84 @@ parse_mode( const char* s, mode_t* theMode)
 
 
 
+
+
+
+
+#if defined (BB_CHMOD_CHOWN_CHGRP) || defined (BB_PS)
+
+/* Use this to avoid needing the glibc NSS stuff 
+ * This uses storage buf to hold things.
+ * */
+uid_t 
+my_getid(const char *filename, char *name, uid_t id) 
+{
+	FILE *stream;
+	char *rname, *start, *end, buf[128];
+	uid_t rid;
+
+	stream=fopen(filename,"r");
+
+	while (fgets (buf, 128, stream) != NULL) {
+		if (buf[0] == '#')
+			continue;
+
+		start = buf;
+		end = strchr (start, ':');
+		if (end == NULL)
+			continue;
+		*end = '\0';
+		rname = start;
+
+		start = end + 1;
+		end = strchr (start, ':');
+		if (end == NULL)
+			continue;
+
+		start = end + 1;
+		rid = (uid_t) strtol (start, &end, 10);
+		if (end == start)
+			continue;
+
+		if (name) {
+		    if (0 == strcmp(rname, name))
+			return( rid);
+                }
+		if ( id != -1 && id == rid ) {
+		    strncpy(name, rname, 8);
+		    return( TRUE);
+		}
+	}
+	fclose(stream);
+	return (-1);
+}
+
+uid_t 
+my_getpwnam(char *name) 
+{
+    return my_getid("/etc/passwd", name, -1);
+}
+
+gid_t 
+my_getgrnam(char *name) 
+{
+    return my_getid("/etc/group", name, -1);
+}
+
+void
+my_getpwuid(char* name, uid_t uid) 
+{
+    my_getid("/etc/passwd", name, uid);
+}
+
+void
+my_getgrgid(char* group, gid_t gid) 
+{
+    my_getid("/etc/group", group, gid);
+}
+
+
+#endif
+
+
 /* END CODE */