Convert utility.c into libbb.a. It is now a whole pile of .c

files.  Clean up the resulting damage and fix up the makefile.
 -Erik

1 files changed, 168 insertions, 0 deletions

diff --git a/libbb/find_pid_by_name.c b/libbb/find_pid_by_name.c
new file mode 100644
index 000000000..a22ee1ff8
--- /dev/null
+++ b/libbb/find_pid_by_name.c
@@ -0,0 +1,168 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) tons of folks.  Tracking down who wrote what
+ * isn't something I'm going to worry about...  If you wrote something
+ * here, please feel free to acknowledge your work.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Based in part on code from sash, Copyright (c) 1999 by David I. Bell 
+ * Permission has been granted to redistribute this code under the GPL.
+ *
+ */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+#include <dirent.h>
+#include <stdlib.h>
+#include "libbb.h"
+
+
+/* For Erik's nifty devps device driver */
+#ifdef BB_FEATURE_USE_DEVPS_PATCH
+#include <linux/devps.h> 
+
+/* find_pid_by_name()
+ *  
+ *  This finds the pid of the specified process,
+ *  by using the /dev/ps device driver.
+ *
+ *  Returns a list of all matching PIDs
+ */
+extern pid_t* find_pid_by_name( char* pidName)
+{
+        int fd, i, j;
+        char device[] = "/dev/ps";
+        pid_t num_pids;
+        pid_t* pid_array = NULL;
+        pid_t* pidList=NULL;
+
+        /* open device */ 
+        fd = open(device, O_RDONLY);
+        if (fd < 0)
+                perror_msg_and_die("open failed for `%s'", device);
+
+        /* Find out how many processes there are */
+        if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0) 
+                perror_msg_and_die("\nDEVPS_GET_PID_LIST");
+        
+        /* Allocate some memory -- grab a few extras just in case 
+         * some new processes start up while we wait. The kernel will
+         * just ignore any extras if we give it too many, and will trunc.
+         * the list if we give it too few.  */
+        pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t));
+        pid_array[0] = num_pids+10;
+
+        /* Now grab the pid list */
+        if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0) 
+                perror_msg_and_die("\nDEVPS_GET_PID_LIST");
+
+        /* Now search for a match */
+        for (i=1, j=0; i<pid_array[0] ; i++) {
+                char* p;
+                struct pid_info info;
+
+            info.pid = pid_array[i];
+            if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
+                        perror_msg_and_die("\nDEVPS_GET_PID_INFO");
+
+                /* Make sure we only match on the process name */
+                p=info.command_line+1;
+                while ((*p != 0) && !isspace(*(p)) && (*(p-1) != '\\')) { 
+                        (p)++;
+                }
+                if (isspace(*(p)))
+                                *p='\0';
+
+                if ((strstr(info.command_line, pidName) != NULL)
+                                && (strlen(pidName) == strlen(info.command_line))) {
+                        pidList=xrealloc( pidList, sizeof(pid_t) * (j+2));
+                        pidList[j++]=info.pid;
+                }
+        }
+        if (pidList)
+                pidList[j]=0;
+
+        /* Free memory */
+        free( pid_array);
+
+        /* close device */
+        if (close (fd) != 0) 
+                perror_msg_and_die("close failed for `%s'", device);
+
+        return pidList;
+}
+
+#else           /* BB_FEATURE_USE_DEVPS_PATCH */
+
+/* find_pid_by_name()
+ *  
+ *  This finds the pid of the specified process.
+ *  Currently, it's implemented by rummaging through 
+ *  the proc filesystem.
+ *
+ *  Returns a list of all matching PIDs
+ */
+extern pid_t* find_pid_by_name( char* pidName)
+{
+        DIR *dir;
+        struct dirent *next;
+        pid_t* pidList=NULL;
+        int i=0;
+
+        dir = opendir("/proc");
+        if (!dir)
+                perror_msg_and_die("Cannot open /proc");
+        
+        while ((next = readdir(dir)) != NULL) {
+                FILE *status;
+                char filename[256];
+                char buffer[256];
+
+                /* If it isn't a number, we don't want it */
+                if (!isdigit(*next->d_name))
+                        continue;
+
+                sprintf(filename, "/proc/%s/cmdline", next->d_name);
+                status = fopen(filename, "r");
+                if (!status) {
+                        continue;
+                }
+                fgets(buffer, 256, status);
+                fclose(status);
+
+                if (strstr(get_last_path_component(buffer), pidName) != NULL) {
+                        pidList=xrealloc( pidList, sizeof(pid_t) * (i+2));
+                        pidList[i++]=strtol(next->d_name, NULL, 0);
+                }
+        }
+
+        if (pidList)
+                pidList[i]=0;
+        return pidList;
+}
+#endif                                                  /* BB_FEATURE_USE_DEVPS_PATCH */
+
+/* END CODE */
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/