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-rw-r--r--toys/pending/ps.c105
1 files changed, 56 insertions, 49 deletions
diff --git a/toys/pending/ps.c b/toys/pending/ps.c
index fddf2f3f..f6680bf7 100644
--- a/toys/pending/ps.c
+++ b/toys/pending/ps.c
@@ -2,6 +2,7 @@
*
* Copyright 2013 Sandeep Sharma <sandeep.jack2756@gmail.com>
* Copyright 2013 Kyungwan Han <asura321@gmail.com>
+ *
* See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html
USE_PS(NEWTOY(ps, ">0o*T", TOYFLAG_BIN))
@@ -13,9 +14,11 @@ config PS
usage: ps [-o COL1,COL2=HEADER] [-T]
Show list of processes
+
-o COL1,COL2=HEADER Select columns for display
-T Show threads
*/
+
#define FOR_ps
#include "toys.h"
@@ -34,26 +37,6 @@ struct header_list {
struct header_list *next;
};
-struct header_list def_header[] = {
- {"user", "USER", "%-*s ", 8, 0, NULL},
- {"group", "GROUP", "%-*s ", 8, 1, NULL},
- {"comm", "COMMAND", "%-*s ",16, 2, NULL},
- {"args", "COMMAND", "%-*s ",30, 3, NULL},
- {"pid", "PID", "%*s ", 5, 4, NULL},
- {"ppid","PPID", "%*s ", 5, 5, NULL},
- {"pgid", "PGID", "%*s ", 5, 6, NULL},
- {"etime","ELAPSED", "%*s ", 7, 7, NULL},
- {"nice", "NI", "%*s ", 5, 8, NULL},
- {"rgroup","RGROUP", "%-*s ", 8, 9, NULL},
- {"ruser","RUSER", "%-*s ", 8, 10, NULL},
- {"time", "TIME", "%*s ", 6, 11, NULL},
- {"tty", "TT", "%-*s ", 6, 12, NULL},
- {"vsz","VSZ", "%*s ", 7, 13, NULL},
- {"stat", "STAT", "%-*s ", 4, 14, NULL},
- {"rss", "RSS", "%*s ", 4, 15, NULL},
- {NULL, NULL, NULL, 0, 0, NULL},
-};
-
struct header_list *o_list = NULL; //List of Header attributes.
/*
@@ -73,66 +56,67 @@ static void list_add(struct header_list **list, struct header_list *data, char *
new->position = data->position;
if (temp) {
- while (temp->next != NULL) temp = temp->next;
+ while (temp->next) temp = temp->next;
temp->next = new;
- } else (*list) = new;
+ } else *list = new;
}
//print the default header OR header with -o args
-static void print_header(void)
+static void print_header(struct header_list *hdr, int hdr_len)
{
int i = 0;
char *ptr = NULL, *str, *temp;
struct arg_list *node = TT.llist_o;
- if (!(toys.optflags & FLAG_o)) {
- xprintf(" PID"" ""USER"" "" TIME"" ""COMMAND");
- list_add(&o_list, &def_header[4], NULL); //pid
- list_add(&o_list, &def_header[0], NULL); //user
- list_add(&o_list, &def_header[11], NULL); //time
- list_add(&o_list, &def_header[3], NULL); //comm
- xputc('\n');
- return ;
+ // Default pid, user, time, comm
+ if (!node) {
+ list_add(&o_list, hdr+4, 0);
+ list_add(&o_list, hdr, 0);
+ list_add(&o_list, hdr+11, 0);
+ list_add(&o_list, hdr+3, 0);
}
+
while (node) {
+ char *s = str = xstrdup(node->arg);
+
i = 0;
- str = xstrdup(node->arg);
while (str) {
if ((ptr = strsep(&str, ","))) { //seprate list
if ((temp = strchr(ptr, '='))) { // Handle ppid = MOM
*temp = 0;
temp++;
- while (def_header[i].name) {
- if (!(strcmp(def_header[i].name, ptr))) { // search from default header
- if (str) ptr = xmprintf("%s,%s", temp, str); //handle condition like ppid = M,OM
+ while (hdr[i].name) {
+ // search from default header
+ if (!(strcmp(hdr[i].name, ptr))) {
+ //handle condition like ppid = M,OM
+ if (str) ptr = xmprintf("%s,%s", temp, str);
else ptr = xmprintf("%s", temp);
- list_add(&o_list, &def_header[i], ptr);
+ list_add(&o_list, &hdr[i], ptr);
break;
}
i++;
}
- if (!def_header[i].name) perror_exit("Invalid arg for -o option");
+ if (!hdr[i].name) perror_exit("Invalid arg for -o option");
break;
} else {
- while (def_header[i].name) {
- if (!(strcmp(def_header[i].name, ptr))) {
- list_add(&o_list, &def_header[i], NULL);
+ while (hdr[i].name) {
+ if (!(strcmp(hdr[i].name, ptr))) {
+ list_add(&o_list, &hdr[i], 0);
break;
}
i++;
}
- if (!def_header[i].name) perror_exit("Invalid arg for -o option");
+ if (!hdr[i].name) error_exit("bad -o");
i = 0;
}
}
}
+ free(s);
node = node->next;
}
- struct header_list *p = o_list;
- while (p) { //print Header
- printf(p->format , p->width, p->header);
- p = p->next;
- }
+
+ for (hdr = o_list; hdr; hdr = hdr->next)
+ printf(hdr->format , hdr->width, hdr->header);
xputc('\n');
}
@@ -140,6 +124,7 @@ static void print_header(void)
static void get_uid_gid(char *p, char *id_str, unsigned *id)
{
FILE *f;
+
if(!p) return;
f = xfopen(p, "r");
while (fgets(toybuf, BUFF_SIZE, f)) {
@@ -158,6 +143,7 @@ void get_etime(unsigned long s_time)
unsigned sec;
struct sysinfo info;
char *temp;
+
sysinfo(&info);
min = s_time/sysconf(_SC_CLK_TCK);
min = info.uptime - min;
@@ -174,6 +160,7 @@ void get_time(unsigned long s_time, unsigned long u_time)
unsigned long min;
unsigned sec;
char *temp;
+
min = (s_time + u_time)/sysconf(_SC_CLK_TCK);
sec = min % 60;
min = min / 60;
@@ -188,7 +175,8 @@ void get_time(unsigned long s_time, unsigned long u_time)
*/
static void read_cmdline(int fd, char *cmd_ptr)
{
- int size = read(fd, cmd_ptr, 1024); //sizeof(cmd_buf)
+ int size = read(fd, cmd_ptr, BUFF_SIZE); //sizeof(cmd_buf)
+
cmd_ptr[size] = '\0';
while (--size > 0 && cmd_ptr[size] == '\0'); //reach to last char
@@ -204,7 +192,7 @@ static void read_cmdline(int fd, char *cmd_ptr)
*/
static void do_ps_line(int pid, int tid)
{
- char *stat_buff = toybuf + 1024, *cmd_buff = toybuf + 2048;
+ char *stat_buff = toybuf + BUFF_SIZE, *cmd_buff = toybuf + (2*BUFF_SIZE);
char state[4] = {0,};
int tty, tty_major, tty_minor, fd, n, nice, width_counter = 0;
struct stat stats;
@@ -392,10 +380,29 @@ void ps_main(void)
DIR *dp;
struct dirent *entry;
int pid;
+ struct header_list def_header[] = {
+ {"user", "USER", "%-*s ", 8, 0, NULL},
+ {"group", "GROUP", "%-*s ", 8, 1, NULL},
+ {"comm", "COMMAND", "%-*s ",16, 2, NULL},
+ {"args", "COMMAND", "%-*s ",30, 3, NULL},
+ {"pid", "PID", "%*s ", 5, 4, NULL},
+ {"ppid","PPID", "%*s ", 5, 5, NULL},
+ {"pgid", "PGID", "%*s ", 5, 6, NULL},
+ {"etime","ELAPSED", "%*s ", 7, 7, NULL},
+ {"nice", "NI", "%*s ", 5, 8, NULL},
+ {"rgroup","RGROUP", "%-*s ", 8, 9, NULL},
+ {"ruser","RUSER", "%-*s ", 8, 10, NULL},
+ {"time", "TIME", "%*s ", 6, 11, NULL},
+ {"tty", "TT", "%-*s ", 6, 12, NULL},
+ {"vsz","VSZ", "%*s ", 7, 13, NULL},
+ {"stat", "STAT", "%-*s ", 4, 14, NULL},
+ {"rss", "RSS", "%*s ", 4, 15, NULL},
+{0,0,0,0,0,0}
+ };
TT.screen_width = 80; //default width
terminal_size(&TT.screen_width, NULL);
- print_header();
+ print_header(def_header, ARRAY_LEN(def_header));
if (!(dp = opendir("/proc"))) perror_exit("opendir");
while ((entry = readdir(dp))) {
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-31 23:18:05 +0000