From 371dfd41efca697e72832cdf5db61ffd4c7e7a98 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Sat, 10 Feb 2018 10:34:42 -0600 Subject: Rename struct strawberry -> struct ofields, and carveup -> procpid. The first contains display fields selectable by the -o argument, the second contains the /proc/$PID data for one process. --- toys/posix/ps.c | 138 ++++++++++++++++++++++++++++---------------------------- 1 file changed, 69 insertions(+), 69 deletions(-) (limited to 'toys') diff --git a/toys/posix/ps.c b/toys/posix/ps.c index e94902b3..e3a2d310 100644 --- a/toys/posix/ps.c +++ b/toys/posix/ps.c @@ -286,21 +286,20 @@ GLOBALS( void (*show_process)(void *tb); ) -/* Linked list of fields selected for display, in order, with :len and =title */ +// Linked list of -o fields selected for display, in order, with :len and =title -struct strawberry { - struct strawberry *next, *prev; +struct ofields { + struct ofields *next, *prev; short which, len, reverse; char *title; - char forever[]; }; /* The function get_ps() reads all the data about one process, saving it in - * toybox as a struct carveup. Simple ps calls then pass toybuf directly to - * show_ps(), but features like sorting instead append a copy to a linked list + * toybox as a struct procpid. Simple ps calls then pass toybuf directly to + * show_ps(), but features like sorting append a copy to a linked list * for further processing once all processes have been read. * - * struct carveup contains a slot[] array of 64 bit values, with the following + * struct procpid contains a slot[] array of 64 bit values, with the following * data at each position in the array. Most is read from /proc/$PID/stat (see * https://kernel.org/doc/Documentation/filesystems/proc.txt table 1-4) but * we we replace several fields with don't use with other data. */ @@ -346,7 +345,7 @@ enum { starting position of each string after the first (which is always 0). */ // Data layout in toybuf -struct carveup { +struct procpid { long long slot[SLOT_count]; // data (see enum above) unsigned short offset[6]; // offset of fields in str[] (skip CMD, always 0) char state; @@ -364,7 +363,7 @@ struct carveup { * the display code reclaims unused padding from later fields to try to * get the overflow back). * - * slot: which slot[] out of carveup. Negative means it's a string field. + * slot: which slot[] out of procpid. Negative means it's a string field. * Setting bit |64 requests extra display/sort processing. * * The TAGGED_ARRAY plumbing produces an enum of indexes, the "tag" is the @@ -391,7 +390,7 @@ struct typography { {"RTPRIO", 6, SLOT_rtprio}, {"SCH", 3, SLOT_policy}, {"CPU", 3, SLOT_taskcpu}, {"TID", 5, SLOT_tid}, {"TCNT", 4, SLOT_tcount}, {"BIT", 3, SLOT_bits}, - // String fields (-1 is carveup->str, rest are str+offset[1-slot]) + // String fields (-1 is procpid->str, rest are str+offset[1-slot]) {"TTY", -8, -2}, {"WCHAN", -6, -3}, {"LABEL", -30, -4}, {"COMM", -27, -5}, {"NAME", -27, -7}, {"COMMAND", -27, -5}, {"CMDLINE", -27, -6}, {"ARGS", -27, -6}, {"CMD", -15, -1}, @@ -464,7 +463,7 @@ static int ps_match_process(long long *slot) } // Convert field to string representation -static char *string_field(struct carveup *tb, struct strawberry *field) +static char *string_field(struct procpid *tb, struct ofields *field) { char *buf = toybuf+sizeof(toybuf)-260, *out = buf, *s; int which = field->which, sl = typos[which].slot; @@ -593,8 +592,8 @@ static char *string_field(struct carveup *tb, struct strawberry *field) // Display process data that get_ps() read from /proc, formatting with TT.fields static void show_ps(void *p) { - struct carveup *tb = p; - struct strawberry *field; + struct procpid *tb = p; + struct ofields *field; int pad, len, width = TT.width, abslen, sign, olen, extra = 0; // Loop through fields to display @@ -654,7 +653,7 @@ static void show_ps(void *p) } // dirtree callback: read data about process to display, store, or discard it. -// Fills toybuf with struct carveup and either DIRTREE_SAVEs a copy to ->extra +// Fills toybuf with struct procpid and either DIRTREE_SAVEs a copy to ->extra // (in -k mode) or calls show_ps on toybuf (no malloc/copy/free there). static int get_ps(struct dirtree *new) { @@ -662,12 +661,12 @@ static int get_ps(struct dirtree *new) char *name; // Path under /proc/$PID directory long long bits; // Only fetch extra data if an -o field is displaying it } fetch[] = { - // sources for carveup->offset[] data + // sources for procpid->offset[] data {"fd/", _PS_TTY}, {"wchan", _PS_WCHAN}, {"attr/current", _PS_LABEL}, {"exe", _PS_COMMAND|_PS_COMM}, {"cmdline", _PS_CMDLINE|_PS_ARGS|_PS_NAME}, {"", _PS_NAME} }; - struct carveup *tb = (void *)toybuf; + struct procpid *tb = (void *)toybuf; long long *slot = tb->slot; char *name, *s, *buf = tb->str, *end = 0; int i, j, fd; @@ -681,7 +680,7 @@ static int get_ps(struct dirtree *new) memset(slot, 0, sizeof(tb->slot)); tb->slot[SLOT_tid] = *slot = atol(new->name); if (TT.threadparent && TT.threadparent->extra) - if (*slot == *(((struct carveup *)TT.threadparent->extra)->slot)) return 0; + if (*slot == *(((struct procpid *)TT.threadparent->extra)->slot)) return 0; fd = dirtree_parentfd(new); len = 2048; @@ -804,7 +803,7 @@ static int get_ps(struct dirtree *new) // For exe we readlink instead of read contents if (j==3 || j==5) { - struct carveup *ptb = 0; + struct procpid *ptb = 0; int k; // Thread doesn't have exe or argv[0], so use parent's @@ -925,7 +924,7 @@ static int get_ps(struct dirtree *new) static int get_threads(struct dirtree *new) { struct dirtree *dt; - struct carveup *tb; + struct procpid *tb; unsigned pid, kcount; if (!new->parent) return get_ps(new); @@ -975,7 +974,7 @@ static int get_threads(struct dirtree *new) static char *parse_ko(void *data, char *type, int length) { - struct strawberry *field; + struct ofields *field; char *width, *title, *end, *s; int i, j, k; @@ -995,10 +994,11 @@ static char *parse_ko(void *data, char *type, int length) if (!title) length = width-type; } else width = 0; - // Allocate structure, copy title - field = xzalloc(sizeof(struct strawberry)+(length+1)*!!title); + // Allocate structure plus extra space to append a copy of title data + // (this way it's same lifetime, freeing struct automatically frees title) + field = xzalloc(sizeof(struct ofields)+(length+1)*!!title); if (title) { - memcpy(field->title = field->forever, title, length); + memcpy(field->title = (char *)(field+1), title, length); field->title[field->len = length] = 0; } @@ -1036,15 +1036,15 @@ static char *parse_ko(void *data, char *type, int length) return 0; } -static long long get_headers(struct strawberry *fields, char *buf, int blen) +static long long get_headers(struct ofields *field, char *buf, int blen) { long long bits = 0; int len = 0; - for (; fields; fields = fields->next) { - len += snprintf(buf+len, blen-len, " %*s"+!bits, fields->len, - fields->title); - bits |= 1LL<which; + for (; field; field = field->next) { + len += snprintf(buf+len, blen-len, " %*s"+!bits, field->len, + field->title); + bits |= 1LL<which; } return bits; @@ -1131,8 +1131,8 @@ static char *parse_rest(void *data, char *str, int len) // sort for -k static int ksort(void *aa, void *bb) { - struct strawberry *field; - struct carveup *ta = *(struct carveup **)aa, *tb = *(struct carveup **)bb; + struct ofields *field; + struct procpid *ta = *(struct procpid **)aa, *tb = *(struct procpid **)bb; int ret = 0, slot; for (field = TT.kfields; field && !ret; field = field->next) { @@ -1156,7 +1156,7 @@ static int ksort(void *aa, void *bb) return ret; } -static struct carveup **collate_leaves(struct carveup **tb, struct dirtree *dt) +static struct procpid **collate_leaves(struct procpid **tb, struct dirtree *dt) { while (dt) { struct dirtree *next = dt->next; @@ -1170,9 +1170,9 @@ static struct carveup **collate_leaves(struct carveup **tb, struct dirtree *dt) return tb; } -static struct carveup **collate(int count, struct dirtree *dt) +static struct procpid **collate(int count, struct dirtree *dt) { - struct carveup **tbsort = xmalloc(count*sizeof(struct carveup *)); + struct procpid **tbsort = xmalloc(count*sizeof(struct procpid *)); collate_leaves(tbsort, dt); @@ -1244,20 +1244,20 @@ void ps_main(void) default_ko(toybuf, &TT.fields, "bad -o", TT.ps.o); if (TT.ps.O) { - if (TT.fields) TT.fields = ((struct strawberry *)TT.fields)->prev; + if (TT.fields) TT.fields = ((struct ofields *)TT.fields)->prev; comma_args(TT.ps.O, &TT.fields, "bad -O", parse_ko); - if (TT.fields) TT.fields = ((struct strawberry *)TT.fields)->next; + if (TT.fields) TT.fields = ((struct ofields *)TT.fields)->next; } dlist_terminate(TT.fields); // -f and -n change the meaning of some fields if (toys.optflags&(FLAG_f|FLAG_n)) { - struct strawberry *ever; + struct ofields *field; - for (ever = TT.fields; ever; ever = ever->next) { - if ((toys.optflags&FLAG_n) && ever->which>=PS_UID - && ever->which<=PS_RGROUP && (typos[ever->which].slot&64)) - ever->which--; + for (field = TT.fields; field; field = field->next) { + if ((toys.optflags&FLAG_n) && field->which>=PS_UID + && field->which<=PS_RGROUP && (typos[field->which].slot&64)) + field->which--; } } @@ -1272,11 +1272,11 @@ void ps_main(void) ? get_threads : get_ps); if ((dt != DIRTREE_ABORTVAL) && toys.optflags&(FLAG_k|FLAG_M)) { - struct carveup **tbsort = collate(TT.kcount, dt); + struct procpid **tbsort = collate(TT.kcount, dt); if (toys.optflags&FLAG_M) { for (i = 0; inext) { int len = strlen(string_field(tbsort[i], field)); @@ -1291,7 +1291,7 @@ void ps_main(void) } if (toys.optflags&FLAG_k) - qsort(tbsort, TT.kcount, sizeof(struct carveup *), (void *)ksort); + qsort(tbsort, TT.kcount, sizeof(struct procpid *), (void *)ksort); for (i = 0; inext) { if ((TT.sortpos = i++)next) continue; - going2 = TT.kfields; - going2->which = field->which; - going2->len = field->len; + field2 = TT.kfields; + field2->which = field->which; + field2->len = field->len; break; } } @@ -1367,7 +1367,7 @@ static void top_common( { long long timeout = 0, now, stats[16]; struct proclist { - struct carveup **tb; + struct procpid **tb; int count; long long whence; } plist[2], *plold, *plnew, old, new, mix; @@ -1413,11 +1413,11 @@ static void top_common( // Collate old and new into "mix", depends on /proc read in pid sort order old = *plold; new = *plnew; - mix.tb = xmalloc((old.count+new.count)*sizeof(struct carveup)); + mix.tb = xmalloc((old.count+new.count)*sizeof(struct procpid)); mix.count = 0; while (old.count || new.count) { - struct carveup *otb = old.count ? *old.tb : 0, + struct procpid *otb = old.count ? *old.tb : 0, *ntb = new.count ? *new.tb : 0; // If we just have old for this process, it exited. Discard it. @@ -1448,7 +1448,7 @@ static void top_common( char was, is; if (recalc) { - qsort(mix.tb, mix.count, sizeof(struct carveup *), (void *)ksort); + qsort(mix.tb, mix.count, sizeof(struct procpid *), (void *)ksort); if (!(toys.optflags&FLAG_b)) { printf("\033[H\033[J"); if (toys.signal) { @@ -1462,16 +1462,16 @@ static void top_common( if (recalc && !(toys.optflags&FLAG_q)) { // Display "top" header. if (*toys.which->name == 't') { - struct strawberry alluc; + struct ofields field; long long ll, up = 0; long run[6]; int j; // Count running, sleeping, stopped, zombie processes. - alluc.which = PS_S; + field.which = PS_S; memset(run, 0, sizeof(run)); for (i = 0; inext) { + for (field = TT.fields; field; field = field->next) { long long ll, bits = 0; - int slot = typos[fields->which].slot&63; + int slot = typos[field->which].slot&63; - if (fields->whichwhich>PS_DIO) continue; - ll = 1LL<which; + if (field->whichwhich>PS_DIO) continue; + ll = 1LL<which; if (bits&ll) continue; bits |= ll; for (i=0; islot[slot]; pos += snprintf(pos, sizeof(toybuf)/2-(pos-toybuf), - " %s: %*s,", typos[fields->which].name, - fields->len, string_field(&tb, fields)); + " %s: %*s,", typos[field->which].name, + field->len, string_field(&tb, field)); } *--pos = 0; lines = header_line(lines, 0); @@ -1587,7 +1587,7 @@ static void top_common( timeout = 0; break; } else if (toupper(i)=='R') - ((struct strawberry *)TT.kfields)->reverse *= -1; + ((struct ofields *)TT.kfields)->reverse *= -1; else { i -= 256; if (i == KEY_LEFT) setsort(TT.sortpos-1); @@ -1658,10 +1658,10 @@ void top_main(void) if (!TT.top.s) TT.top.s = TT.top.O ? 3 : 9; top_setup(toybuf, "-%CPU,-ETIME,-PID"); if (TT.top.O) { - struct strawberry *fields = TT.fields; + struct ofields *field = TT.fields; - fields = fields->next->next; - comma_args(TT.top.O, &fields, "bad -O", parse_ko); + field = field->next->next; + comma_args(TT.top.O, &field, "bad -O", parse_ko); } top_common(merge_deltas); @@ -1705,7 +1705,7 @@ struct regex_list { regex_t reg; }; -static void do_pgk(struct carveup *tb) +static void do_pgk(struct procpid *tb) { if (TT.pgrep.signal) { if (kill(*tb->slot, TT.pgrep.signal)) { @@ -1726,7 +1726,7 @@ static void do_pgk(struct carveup *tb) static void match_pgrep(void *p) { - struct carveup *tb = p; + struct procpid *tb = p; regmatch_t match; struct regex_list *reg; char *name = tb->str+tb->offset[4]*!!(toys.optflags&FLAG_f);; -- cgit v1.2.3