*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
*
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
and therefore comm field contains "exe".
*/
-/* find_pid_by_name()
+static int comm_match(procps_status_t *p, const char *procName)
+{
+ int argv1idx;
+ const char *argv1;
+
+ if (strncmp(p->comm, procName, 15) != 0)
+ return 0; /* comm does not match */
+
+ /* In Linux, if comm is 15 chars, it is truncated.
+ * (or maybe the name was exactly 15 chars, but there is
+ * no way to know that) */
+ if (p->comm[14] == '\0')
+ return 1; /* comm is not truncated - matches */
+
+ /* comm is truncated, but first 15 chars match.
+ * This can be crazily_long_script_name.sh!
+ * The telltale sign is basename(argv[1]) == procName */
+
+ if (!p->argv0)
+ return 0;
+
+ argv1idx = strlen(p->argv0) + 1;
+ if (argv1idx >= p->argv_len)
+ return 0;
+ argv1 = p->argv0 + argv1idx;
+
+ if (strcmp(bb_basename(argv1), procName) != 0)
+ return 0;
+
+ return 1;
+}
+
+/* This finds the pid of the specified process.
+ * Currently, it's implemented by rummaging through
+ * the proc filesystem.
*
- * Modified by Vladimir Oleynik for use with libbb/procps.c
- * 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
+ * It is the caller's duty to free the returned pidlist.
*
- * Returns a list of all matching PIDs
- * It is the caller's duty to free the returned pidlist.
+ * Modified by Vladimir Oleynik for use with libbb/procps.c
*/
-pid_t* find_pid_by_name(const char* procName)
+pid_t* FAST_FUNC find_pid_by_name(const char *procName)
{
pid_t* pidList;
int i = 0;
procps_status_t* p = NULL;
- pidList = xmalloc(sizeof(*pidList));
- while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_COMM|PSSCAN_ARGV0))) {
- if (
- /* we require comm to match and to not be truncated */
- /* in Linux, if comm is 15 chars, it may be a truncated
- * name, so we don't allow that to match */
- (!p->comm[sizeof(p->comm)-2] && strcmp(p->comm, procName) == 0)
+ pidList = xzalloc(sizeof(*pidList));
+ while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_COMM|PSSCAN_ARGVN|PSSCAN_EXE))) {
+ if (comm_match(p, procName)
/* or we require argv0 to match (essential for matching reexeced /proc/self/exe)*/
|| (p->argv0 && strcmp(bb_basename(p->argv0), procName) == 0)
- /* TOOD: we can also try /proc/NUM/exe link, do we want that? */
+ /* or we require /proc/PID/exe link to match */
+ || (p->exe && strcmp(bb_basename(p->exe), procName) == 0)
) {
- pidList = xrealloc(pidList, sizeof(*pidList) * (i+2));
+ pidList = xrealloc_vector(pidList, 2, i);
pidList[i++] = p->pid;
}
}
return pidList;
}
-pid_t *pidlist_reverse(pid_t *pidList)
+pid_t* FAST_FUNC pidlist_reverse(pid_t *pidList)
{
int i = 0;
while (pidList[i])