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authorAlexander Shishkin2009-07-29 01:35:13 +0200
committerDenys Vlasenko2009-07-29 01:35:13 +0200
commite766f6213259d4cb3b3b0ce09aa43690215bfe4e (patch)
tree8a73d1e4a4408e3bec91f31695612f2aeaa4f4d8 /libbb/find_pid_by_name.c
parent09449630fbf0331a76a9d055fcbff0774c57ab65 (diff)
downloadbusybox-e766f6213259d4cb3b3b0ce09aa43690215bfe4e.zip
busybox-e766f6213259d4cb3b3b0ce09aa43690215bfe4e.tar.gz
make find_pid_by_name look at /proc/PID/exe too
function old new delta procps_scan 1642 1709 +67 find_pid_by_name 193 223 +30 free_procps_scan 29 37 +8 Signed-off-by: Alexander Shishkin <virtuoso@slind.org> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libbb/find_pid_by_name.c')
-rw-r--r--libbb/find_pid_by_name.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/libbb/find_pid_by_name.c b/libbb/find_pid_by_name.c
index 600d4e1..52a0c6d 100644
--- a/libbb/find_pid_by_name.c
+++ b/libbb/find_pid_by_name.c
@@ -41,18 +41,20 @@ and therefore comm field contains "exe".
static int comm_match(procps_status_t *p, const char *procName)
{
int argv1idx;
+ const char *argv1;
- /* comm does not match */
if (strncmp(p->comm, procName, 15) != 0)
- return 0;
+ return 0; /* comm does not match */
- /* in Linux, if comm is 15 chars, it may be a truncated */
- if (p->comm[14] == '\0') /* comm is not truncated - match */
- return 1;
+ /* 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. */
+ * The telltale sign is basename(argv[1]) == procName */
if (!p->argv0)
return 0;
@@ -60,8 +62,9 @@ static int comm_match(procps_status_t *p, const char *procName)
argv1idx = strlen(p->argv0) + 1;
if (argv1idx >= p->argv_len)
return 0;
+ argv1 = p->argv0 + argv1idx;
- if (strcmp(bb_basename(p->argv0 + argv1idx), procName) != 0)
+ if (strcmp(bb_basename(argv1), procName) != 0)
return 0;
return 1;
@@ -83,11 +86,12 @@ pid_t* FAST_FUNC find_pid_by_name(const char *procName)
procps_status_t* p = NULL;
pidList = xzalloc(sizeof(*pidList));
- while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_COMM|PSSCAN_ARGVN))) {
+ 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)
- /* TODO: 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_vector(pidList, 2, i);
pidList[i++] = p->pid;