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-rw-r--r--toys/pending/ps.c244
1 files changed, 127 insertions, 117 deletions
diff --git a/toys/pending/ps.c b/toys/pending/ps.c
index 341bfdfc..e88cd453 100644
--- a/toys/pending/ps.c
+++ b/toys/pending/ps.c
@@ -360,10 +360,25 @@ static int do_ps(struct dirtree *new)
return 0;
}
-void parse_o(char *ooo)
+// Traverse arg_list of csv, calling callback on each value
+void comma_args(struct arg_list *al, char *(*callback)(char **str, int len))
+{
+ char *err, *next, *arg;
+ int len;
+
+ while (al) {
+ arg = al->arg;
+ while ((next = comma_iterate(&arg, &len)))
+ if ((err = callback(&next, len)))
+ perror_msg("%s '%s'@%ld", err, al->arg, 1+next-al->arg);
+ al = al->next;
+ }
+}
+
+static char *parse_o(char **pstr, int length)
{
struct strawberry *field;
- char *width, *type, *title, *end, *arg = ooo, *s, *typos[] = {
+ char *width, *type = *pstr, *title, *end, *s, *typos[] = {
"F", "S", "UID", "PID", "PPID", "C", "PRI", "NI", "ADDR", "SZ",
"WCHAN", "STIME", "TTY", "TIME", "CMD", "COMMAND", "ELAPSED", "GROUP",
"%CPU", "PGID", "RGROUP", "RUSER", "USER", "VSZ", "RSS", "\xff",
@@ -373,63 +388,109 @@ void parse_o(char *ooo)
-6,5,-8,8,-27,-27,11,-8,
4,5,-8,-8,-8,6,5,-5,
8,-5,4,4};
- int i, j, k, length;
-
- // Set title, length of title, type, end of type, and display width
- while ((type = comma_iterate(&arg, &length))) {
- // Chip off =display_name
- if ((end = strchr(type, '=')) && length>(end-type)) {
- title = end+1;
- length -= (end-type)+1;
- } else {
- end = type+length;
- title = 0;
- }
+ int i, j, k;
- // Chip off :display_width
- if ((width = strchr(type, ':')) && width<end) {
- if (!title) length = width-type;
- } else width = 0;
+ // Get title, length of title, type, end of type, and display width
- // Allocate structure, copy title
- field = xzalloc(sizeof(struct strawberry)+(length+1)*!!title);
- if (title) {
- memcpy(field->title = field->forever, title, length);
- field->title[field->len = length] = 0;
- }
+ // Chip off =name to display
+ if ((end = strchr(type, '=')) && length>(end-type)) {
+ title = end+1;
+ length -= (end-type)+1;
+ } else {
+ end = type+length;
+ title = 0;
+ }
+
+ // Chip off :width to display
+ if ((width = strchr(type, ':')) && width<end) {
+ if (!title) length = width-type;
+ } else width = 0;
- if (width) {
- field->len = strtol(++width, &title, 10);
- if (!isdigit(*width) || title != end)
- error_exit("bad : in -o %s@%ld", ooo, title-ooo);
- end = --width;
+ // Allocate structure, copy title
+ field = xzalloc(sizeof(struct strawberry)+(length+1)*!!title);
+ if (title) {
+ memcpy(field->title = field->forever, title, length);
+ field->title[field->len = length] = 0;
+ }
+
+ if (width) {
+ field->len = strtol(++width, &title, 10);
+ if (!isdigit(*width) || title != end) {
+ *pstr = title;
+ return "bad : in -o";
}
+ end = --width;
+ }
- // Find type
- for (i = 0; i<ARRAY_LEN(typos); i++) {
- field->which = i;
- for (j = 0; j<2; j++) {
- if (!j) s = typos[i];
- // posix requires alternate names for some fields
- else if (-1==(k = stridx((char []){7,14,15,16,18,23,22,0}, i)))
- continue;
- else s = ((char *[]){"NICE","ARGS","COMM","ETIME","PCPU",
- "VSIZE","UNAME"})[k];
-
- if (!strncasecmp(type, s, end-type) && strlen(s)==end-type) break;
- }
- if (j!=2) break;
+ // Find type
+ for (i = 0; i<ARRAY_LEN(typos); i++) {
+ field->which = i;
+ for (j = 0; j<2; j++) {
+ if (!j) s = typos[i];
+ // posix requires alternate names for some fields
+ else if (-1==(k = stridx((char []){7,14,15,16,18,23,22,0}, i))) continue;
+ else s = ((char *[]){"NICE","ARGS","COMM","ETIME","PCPU",
+ "VSIZE","UNAME"})[k];
+
+ if (!strncasecmp(type, s, end-type) && strlen(s)==end-type) break;
}
- if (i==ARRAY_LEN(typos)) error_exit("bad -o %.*s", end-type, type);
- if (!field->title) field->title = typos[field->which];
- if (!field->len) field->len = widths[field->which];
- else if (widths[field->which]<0) field->len *= -1;
- dlist_add_nomalloc((void *)&TT.fields, (void *)field);
-
- // Print padded header.
- printf(" %*s" + (field == TT.fields), field->len, field->title);
- TT.bits |= (i = 1<<field->which);
+ if (j!=2) break;
}
+ if (i==ARRAY_LEN(typos)) return "bad -o";
+ if (!field->title) field->title = typos[field->which];
+ if (!field->len) field->len = widths[field->which];
+ else if (widths[field->which]<0) field->len *= -1;
+ dlist_add_nomalloc((void *)&TT.fields, (void *)field);
+
+ // Print padded header.
+ printf(" %*s" + (field == TT.fields), field->len, field->title);
+ TT.bits |= (i = 1<<field->which);
+
+ return 0;
+}
+
+// -p PID list
+static char *parse_p(char **str, int len)
+{
+ char *end;
+
+ if (!(15&TT.pidlen)) TT.pids = xrealloc(TT.pids, sizeof(long)*(TT.pidlen+16));
+ if ((TT.pids[TT.pidlen++] = xstrtol(*str, &end, 10))<1 || end!=len+*str)
+ return "-p";
+
+ return 0;
+}
+
+static char *parse_t(char **pstr, int len)
+{
+ char *ss, *str = *pstr;
+ int pts = 0;
+
+ if (!(15&TT.ttylen)) TT.ttys = xrealloc(TT.ttys, sizeof(long)*(TT.ttylen+16));
+
+ // -t pts = 12,pts/12, tty = /dev/tty2,tty2,S0
+ if (isdigit(*str)) pts++;
+ else {
+ if (strstart(&str, strcpy(toybuf, "/dev/"))) len -= 5;
+ if (strstart(&str, "pts/")) {
+ len -= 4;
+ pts++;
+ } else if (strstart(&str, "tty")) len -= 3;
+ }
+ if (len<256 && (!(ss = strchr(str, '/')) || ss-str>len))
+ {
+ struct stat st;
+
+ ss = toybuf + sprintf(toybuf, "/dev/%s", pts ? "pts/" : "tty");
+ memcpy(ss, str, len);
+ ss[len] = 0;
+ xstat(toybuf, &st);
+ TT.ttys[TT.ttylen++] = st.st_rdev;
+
+ return 0;
+ }
+
+ return "-t";
}
void ps_main(void)
@@ -437,7 +498,7 @@ void ps_main(void)
int i;
TT.width = 99999;
- if (!FLAG_w) terminal_size(&TT.width, 0);
+ if (!(toys.optflags&FLAG_w)) terminal_size(&TT.width, 0);
// find controlling tty, falling back to /dev/tty if none
for (i = 0; !TT.tty && i<4; i++) {
@@ -450,74 +511,23 @@ void ps_main(void)
if (i==3) close(fd);
}
- // pid list via -p
- if (toys.optflags&FLAG_p) {
- struct arg_list *pl;
- char *next, *end, *arg;
- int len;
-
- for (pl = TT.p; pl; pl = pl->next) {
- arg = pl->arg;
- while ((next = comma_iterate(&arg, &len))) {
- if (!(15&TT.pidlen))
- TT.pids = xrealloc(TT.pids, sizeof(long)*(TT.pidlen+16));
- if ((TT.pids[TT.pidlen++] = xstrtol(next, &end, 10))<1 || end!=next+len)
- perror_exit("-p '%s'@%ld", pl->arg, 1+end-pl->arg);
- }
- }
- }
-
- // tty list via -t
- if (toys.optflags&FLAG_t) {
- struct arg_list *tl;
- char *next, *arg, *ss;
- int len, pts;
-
- for (tl = TT.t; tl; tl = tl->next) {
- arg = tl->arg;
- while ((next = comma_iterate(&arg, &len))) {
- if (!(15&TT.ttylen))
- TT.ttys = xrealloc(TT.ttys, sizeof(long)*(TT.ttylen+16));
-
- // -t pts = 12,pts/12, tty = /dev/tty2,tty2,S0
- pts = 0;
- if (isdigit(*next)) pts++;
- else {
- if (strstart(&next, strcpy(toybuf, "/dev/"))) len -= 5;
- if (strstart(&next, "pts/")) {
- len -= 4;
- pts++;
- } else if (strstart(&next, "tty")) len -= 3;
- }
- if (len<256 && (!(ss = strchr(next, '/')) || ss-next>len))
- {
- struct stat st;
-
- ss = toybuf + sprintf(toybuf, "/dev/%s", pts ? "pts/" : "tty");
- memcpy(ss, next, len);
- ss[len] = 0;
- xstat(toybuf, &st);
- TT.ttys[TT.ttylen++] = st.st_rdev;
- continue;
- }
- perror_exit("-t '%s'@%ld", tl->arg, 1+next-tl->arg);
- }
- }
- }
-
- // Manual field selection via -o
- if (toys.optflags&FLAG_o) {
- struct arg_list *ol;
+ // parse -p, -t
+ comma_args(TT.p, parse_p);
+ comma_args(TT.t, parse_t);
- for (ol = TT.o; ol; ol = ol->next) parse_o(ol->arg);
+ // Manual field selection, or default/-f/-l. Also prints header.
+ if (TT.o) comma_args(TT.o, parse_o);
+ else {
+ struct arg_list al;
- // Default fields (also with -f and -l)
- } else {
+ al.next = 0;
if (toys.optflags&FLAG_f)
- parse_o("USER:8=UID,PID,PPID,C,STIME,TTY,TIME,CMD");
+ al.arg = "USER:8=UID,PID,PPID,C,STIME,TTY,TIME,CMD";
else if (toys.optflags&FLAG_l)
- parse_o("F,S,UID,PID,PPID,C,PRI,NI,ADDR,SZ,WCHAN,TTY,TIME,CMD");
- else parse_o("PID,TTY,TIME,CMD");
+ al.arg = "F,S,UID,PID,PPID,C,PRI,NI,ADDR,SZ,WCHAN,TTY,TIME,CMD";
+ else al.arg = "PID,TTY,TIME,CMD";
+
+ comma_args(&al, parse_o);
}
dlist_terminate(TT.fields);
xputc('\n');
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 06:48:34 +0000