summaryrefslogtreecommitdiff
path: root/i/pc104/initrd/conf/busybox/procps/ps.c
diff options
context:
space:
mode:
Diffstat (limited to 'i/pc104/initrd/conf/busybox/procps/ps.c')
-rw-r--r--i/pc104/initrd/conf/busybox/procps/ps.c388
1 files changed, 388 insertions, 0 deletions
diff --git a/i/pc104/initrd/conf/busybox/procps/ps.c b/i/pc104/initrd/conf/busybox/procps/ps.c
new file mode 100644
index 0000000..c1cb643
--- /dev/null
+++ b/i/pc104/initrd/conf/busybox/procps/ps.c
@@ -0,0 +1,388 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini ps implementation(s) for busybox
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ *
+ * Licensed under the GPL version 2, see the file LICENSE in this tarball.
+ */
+
+#include "busybox.h"
+
+#if ENABLE_DESKTOP
+
+/* Print value to buf, max size+1 chars (including trailing '\0') */
+
+static void func_user(char *buf, int size, const procps_status_t *ps)
+{
+ safe_strncpy(buf, get_cached_username(ps->uid), size+1);
+}
+
+static void func_comm(char *buf, int size, const procps_status_t *ps)
+{
+ safe_strncpy(buf, ps->comm, size+1);
+}
+
+static void func_args(char *buf, int size, const procps_status_t *ps)
+{
+ buf[0] = '\0';
+ if (ps->cmd)
+ safe_strncpy(buf, ps->cmd, size+1);
+ else if (size >= 2)
+ snprintf(buf, size+1, "[%.*s]", size-2, ps->comm);
+}
+
+static void func_pid(char *buf, int size, const procps_status_t *ps)
+{
+ snprintf(buf, size+1, "%*u", size, ps->pid);
+}
+
+static void func_ppid(char *buf, int size, const procps_status_t *ps)
+{
+ snprintf(buf, size+1, "%*u", size, ps->ppid);
+}
+
+static void func_pgid(char *buf, int size, const procps_status_t *ps)
+{
+ snprintf(buf, size+1, "%*u", size, ps->pgid);
+}
+
+static void func_vsz(char *buf, int size, const procps_status_t *ps)
+{
+ char buf5[5];
+ smart_ulltoa5( ((unsigned long long)ps->vsz) << 10, buf5);
+ snprintf(buf, size+1, "%.*s", size, buf5);
+}
+
+/*
+void func_nice(char *buf, int size, const procps_status_t *ps)
+{
+ ps->???
+}
+
+void func_etime(char *buf, int size, const procps_status_t *ps)
+{
+ elapled time [[dd-]hh:]mm:ss
+}
+
+void func_time(char *buf, int size, const procps_status_t *ps)
+{
+ cumulative time [[dd-]hh:]mm:ss
+}
+
+void func_pcpu(char *buf, int size, const procps_status_t *ps)
+{
+}
+
+void func_tty(char *buf, int size, const procps_status_t *ps)
+{
+}
+*/
+
+typedef struct {
+ char name[8];
+ const char *header;
+ void (*f)(char *buf, int size, const procps_status_t *ps);
+ int ps_flags;
+ int width;
+} ps_out_t;
+
+static const ps_out_t out_spec[] = {
+// Mandated by POSIX:
+ { "user" ,"USER" ,func_user ,PSSCAN_UIDGID,8 },
+ { "comm" ,"COMMAND",func_comm ,PSSCAN_COMM ,16 },
+ { "args" ,"COMMAND",func_args ,PSSCAN_CMD|PSSCAN_COMM,256 },
+ { "pid" ,"PID" ,func_pid ,PSSCAN_PID ,5 },
+ { "ppid" ,"PPID" ,func_ppid ,PSSCAN_PPID ,5 },
+ { "pgid" ,"PGID" ,func_pgid ,PSSCAN_PGID ,5 },
+// { "etime" ,"ELAPSED",func_etime ,PSSCAN_ ,sizeof("ELAPSED")-1 },
+// { "group" ,"GROUP" ,func_group ,PSSCAN_UIDGID,sizeof("GROUP" )-1 },
+// { "nice" ,"NI" ,func_nice ,PSSCAN_ ,sizeof("NI" )-1 },
+// { "pcpu" ,"%CPU" ,func_pcpu ,PSSCAN_ ,sizeof("%CPU" )-1 },
+// { "rgroup","RGROUP" ,func_rgroup,PSSCAN_UIDGID,sizeof("RGROUP" )-1 },
+// { "ruser" ,"RUSER" ,func_ruser ,PSSCAN_UIDGID,sizeof("RUSER" )-1 },
+// { "time" ,"TIME" ,func_time ,PSSCAN_ ,sizeof("TIME" )-1 },
+// { "tty" ,"TT" ,func_tty ,PSSCAN_ ,sizeof("TT" )-1 },
+ { "vsz" ,"VSZ" ,func_vsz ,PSSCAN_VSZ ,4 },
+// Not mandated by POSIX:
+// { "rss" ,"RSS" ,func_rss ,PSSCAN_RSS ,4 },
+};
+
+#define VEC_SIZE(v) ( sizeof(v) / sizeof((v)[0]) )
+
+static ps_out_t* out;
+static int out_cnt;
+static int print_header;
+static int ps_flags;
+static char *buffer;
+static unsigned terminal_width;
+
+
+static ps_out_t* new_out_t(void)
+{
+ int i = out_cnt++;
+ out = xrealloc(out, out_cnt * sizeof(*out));
+ return &out[i];
+}
+
+static const ps_out_t* find_out_spec(const char *name)
+{
+ int i;
+ for (i = 0; i < VEC_SIZE(out_spec); i++) {
+ if (!strcmp(name, out_spec[i].name))
+ return &out_spec[i];
+ }
+ bb_error_msg_and_die("bad -o argument '%s'", name);
+}
+
+static void parse_o(char* opt)
+{
+ ps_out_t* new;
+ // POSIX: "-o is blank- or comma-separated list" (FIXME)
+ char *comma, *equal;
+ while (1) {
+ comma = strchr(opt, ',');
+ equal = strchr(opt, '=');
+ if (comma && (!equal || equal > comma)) {
+ *comma = '\0';
+ *new_out_t() = *find_out_spec(opt);
+ *comma = ',';
+ opt = comma + 1;
+ continue;
+ }
+ break;
+ }
+ new = new_out_t();
+ if (equal)
+ *equal = '\0';
+ *new = *find_out_spec(opt);
+ if (equal) {
+ *equal = '=';
+ new->header = equal + 1;
+ // POSIX: the field widths shall be ... at least as wide as
+ // the header text (default or overridden value).
+ // If the header text is null, such as -o user=,
+ // the field width shall be at least as wide as the
+ // default header text
+ if (new->header[0]) {
+ new->width = strlen(new->header);
+ print_header = 1;
+ }
+ } else
+ print_header = 1;
+}
+
+static void post_process(void)
+{
+ int i;
+ int width = 0;
+ for (i = 0; i < out_cnt; i++) {
+ ps_flags |= out[i].ps_flags;
+ if (out[i].header[0]) {
+ print_header = 1;
+ }
+ width += out[i].width + 1; /* "FIELD " */
+ }
+ buffer = xmalloc(width + 1); /* for trailing \0 */
+}
+
+static void format_header(void)
+{
+ int i;
+ ps_out_t* op;
+ char *p = buffer;
+ if (!print_header)
+ return;
+ i = 0;
+ if (out_cnt) {
+ while (1) {
+ op = &out[i];
+ if (++i == out_cnt) /* do not pad last field */
+ break;
+ p += sprintf(p, "%-*s ", op->width, op->header);
+ }
+ strcpy(p, op->header);
+ }
+ printf("%.*s\n", terminal_width, buffer);
+}
+
+static void format_process(const procps_status_t *ps)
+{
+ int i, len;
+ char *p = buffer;
+ i = 0;
+ if (out_cnt) while (1) {
+ out[i].f(p, out[i].width, ps);
+ // POSIX: Any field need not be meaningful in all
+ // implementations. In such a case a hyphen ( '-' )
+ // should be output in place of the field value.
+ if (!p[0]) {
+ p[0] = '-';
+ p[1] = '\0';
+ }
+ len = strlen(p);
+ p += len;
+ len = out[i].width - len + 1;
+ if (++i == out_cnt) /* do not pad last field */
+ break;
+ p += sprintf(p, "%*s", len, "");
+ }
+ printf("%.*s\n", terminal_width, buffer);
+}
+
+/* Cannot be const: parse_o() will choke */
+static char default_o[] = "pid,user" /* TODO: ,vsz,stat */ ",args";
+
+int ps_main(int argc, char **argv);
+int ps_main(int argc, char **argv)
+{
+ procps_status_t *p;
+ llist_t* opt_o = NULL;
+
+ // POSIX:
+ // -a Write information for all processes associated with terminals
+ // Implementations may omit session leaders from this list
+ // -A Write information for all processes
+ // -d Write information for all processes, except session leaders
+ // -e Write information for all processes (equivalent to -A.)
+ // -f Generate a full listing
+ // -l Generate a long listing
+ // -o col1,col2,col3=header
+ // Select which columns to distplay
+ /* We allow (and ignore) most of the above. FIXME */
+ opt_complementary = "o::";
+ getopt32(argc, argv, "o:aAdefl", &opt_o);
+ if (opt_o) {
+ opt_o = llist_rev(opt_o);
+ do {
+ parse_o(opt_o->data);
+ opt_o = opt_o->link;
+ } while (opt_o);
+ } else
+ parse_o(default_o);
+ post_process();
+
+ terminal_width = INT_MAX;
+ if (isatty(1)) {
+ get_terminal_width_height(1, &terminal_width, NULL);
+ terminal_width--;
+ }
+ format_header();
+
+ p = NULL;
+ while ((p = procps_scan(p, ps_flags))) {
+ format_process(p);
+ }
+
+ return EXIT_SUCCESS;
+}
+
+
+#else /* !ENABLE_DESKTOP */
+
+
+int ps_main(int argc, char **argv);
+int ps_main(int argc, char **argv)
+{
+ procps_status_t *p = NULL;
+ int i, len;
+ SKIP_SELINUX(const) int use_selinux = 0;
+ USE_SELINUX(security_context_t sid = NULL;)
+#if !ENABLE_FEATURE_PS_WIDE
+ enum { terminal_width = 79 };
+#else
+ int terminal_width;
+ int w_count = 0;
+#endif
+
+#if ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX
+#if ENABLE_FEATURE_PS_WIDE
+ opt_complementary = "-:ww";
+ USE_SELINUX(i =) getopt32(argc, argv, USE_SELINUX("Z") "w", &w_count);
+ /* if w is given once, GNU ps sets the width to 132,
+ * if w is given more than once, it is "unlimited"
+ */
+ if (w_count) {
+ terminal_width = (w_count==1) ? 132 : INT_MAX;
+ } else {
+ get_terminal_width_height(1, &terminal_width, NULL);
+ /* Go one less... */
+ terminal_width--;
+ }
+#else /* only ENABLE_SELINUX */
+ i = getopt32(argc, argv, "Z");
+#endif
+#if ENABLE_SELINUX
+ if ((i & 1) && is_selinux_enabled())
+ use_selinux = 1;
+#endif
+#endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
+
+ if (use_selinux)
+ puts(" PID Context Stat Command");
+ else
+ puts(" PID Uid VSZ Stat Command");
+
+ while ((p = procps_scan(p, 0
+ | PSSCAN_PID
+ | PSSCAN_UIDGID
+ | PSSCAN_STATE
+ | PSSCAN_VSZ
+ | PSSCAN_CMD
+ ))) {
+ char *namecmd = p->cmd;
+#if ENABLE_SELINUX
+ if (use_selinux) {
+ char sbuf[128];
+ len = sizeof(sbuf);
+
+ if (is_selinux_enabled()) {
+ if (getpidcon(p->pid, &sid) < 0)
+ sid = NULL;
+ }
+
+ if (sid) {
+ /* I assume sid initialized with NULL */
+ len = strlen(sid) + 1;
+ safe_strncpy(sbuf, sid, len);
+ freecon(sid);
+ sid = NULL;
+ } else {
+ safe_strncpy(sbuf, "unknown", 7);
+ }
+ len = printf("%5u %-32s %s ", p->pid, sbuf, p->state);
+ } else
+#endif
+ {
+ const char *user = get_cached_username(p->uid);
+ if (p->vsz == 0)
+ len = printf("%5u %-8s %s ",
+ p->pid, user, p->state);
+ else
+ len = printf("%5u %-8s %6ld %s ",
+ p->pid, user, p->vsz, p->state);
+ }
+
+ i = terminal_width-len;
+
+ if (namecmd && namecmd[0]) {
+ if (i < 0)
+ i = 0;
+ if (strlen(namecmd) > (size_t)i)
+ namecmd[i] = 0;
+ puts(namecmd);
+ } else {
+ namecmd = p->comm;
+ if (i < 2)
+ i = 2;
+ if (strlen(namecmd) > ((size_t)i-2))
+ namecmd[i-2] = 0;
+ printf("[%s]\n", namecmd);
+ }
+ }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ clear_username_cache();
+ return EXIT_SUCCESS;
+}
+
+#endif /* ENABLE_DESKTOP */