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authorDenis Vlasenko2008-07-17 18:39:36 +0000
committerDenis Vlasenko2008-07-17 18:39:36 +0000
commit3b3ca113ed00a6781a28172bb3a6860a5f79ea02 (patch)
tree7834909b21af2b0fdbb7c3c52dc3fef12ba0c051 /libbb
parent18875bf772d72c9c543be8f9ab46dec451f547ea (diff)
downloadbusybox-3b3ca113ed00a6781a28172bb3a6860a5f79ea02.zip
busybox-3b3ca113ed00a6781a28172bb3a6860a5f79ea02.tar.gz
pidof/killall: allow find_pid_by_name to find running
processes started as scripts_with_name_longer_than_15_bytes.sh closes bug 4054 (and is generally neat)
Diffstat (limited to 'libbb')
-rw-r--r--libbb/find_pid_by_name.c43
-rw-r--r--libbb/procps.c17
2 files changed, 42 insertions, 18 deletions
diff --git a/libbb/find_pid_by_name.c b/libbb/find_pid_by_name.c
index ae2f116..2ee423c 100644
--- a/libbb/find_pid_by_name.c
+++ b/libbb/find_pid_by_name.c
@@ -38,6 +38,35 @@ execXXX("/proc/self/exe", applet_name, params....)
and therefore comm field contains "exe".
*/
+static int comm_match(procps_status_t *p, const char *procName)
+{
+ int argv1idx;
+
+ /* comm does not match */
+ if (strncmp(p->comm, procName, 15) != 0)
+ return 0;
+
+ /* in Linux, if comm is 15 chars, it may be a truncated */
+ if (p->comm[14] == '\0') /* comm is not truncated - match */
+ return 1;
+
+ /* 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;
+
+ if (strcmp(bb_basename(p->argv0 + argv1idx), procName) != 0)
+ return 0;
+
+ return 1;
+}
+
/* find_pid_by_name()
*
* Modified by Vladimir Oleynik for use with libbb/procps.c
@@ -48,24 +77,20 @@ and therefore comm field contains "exe".
* Returns a list of all matching PIDs
* It is the caller's duty to free the returned pidlist.
*/
-pid_t* FAST_FUNC 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))) {
+ 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? */
) {
- pidList = xrealloc(pidList, sizeof(*pidList) * (i+2));
+ pidList = xrealloc_vector(pidList, 2, i);
pidList[i++] = p->pid;
}
}
diff --git a/libbb/procps.c b/libbb/procps.c
index a5168a0..f799099 100644
--- a/libbb/procps.c
+++ b/libbb/procps.c
@@ -78,7 +78,7 @@ const char* FAST_FUNC get_cached_groupname(gid_t gid)
#define PROCPS_BUFSIZE 1024
-static int FAST_FUNC read_to_buf(const char *filename, void *buf)
+static int read_to_buf(const char *filename, void *buf)
{
int fd;
/* open_read_close() would do two reads, checking for EOF.
@@ -385,16 +385,15 @@ procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
n = read_to_buf(filename, buf);
if (n <= 0)
break;
-#if ENABLE_PGREP || ENABLE_PKILL
if (flags & PSSCAN_ARGVN) {
- do {
- n--;
- if (buf[n] == '\0')
- buf[n] = ' ';
- } while (n);
+ sp->argv_len = n;
+ sp->argv0 = xmalloc(n + 1);
+ memcpy(sp->argv0, buf, n + 1);
+ /* sp->argv0[n] = '\0'; - buf has it */
+ } else {
+ sp->argv_len = 0;
+ sp->argv0 = xstrdup(buf);
}
-#endif
- sp->argv0 = xstrdup(buf);
}
#endif
break;