$Id: w3m-pclose.md 810 2006-05-09 02:02:28Z sakurai $

､ｳ､ﾎﾊｸｾﾏ､ﾏ?

w3m､ﾎ･ﾐ･ｰ､�ｽ､ﾀｵ､ｷ､ｿｻ�､ﾎｵｭﾏｿ､ﾇ､ｹ｡｣ ･ﾐ･ｰｽ､ﾀｵ､ﾎ･ｱ｡ｼ･ｹ･ｹ･ｿ･ﾇ･｣ﾅｪ､ﾊﾊｪ､ｬ､｢､�､ﾈﾍｭﾍﾑ､ｫ､ﾊ､ﾈｻﾗ､ﾃ､ｿ､ﾎ､ﾇ｡｢ｸ�ｳｫ､ｷ､ﾞ､ｹ｡｣

(ﾃﾎｿﾍｰﾊｳｰ､ｫ､�)ﾈｿｶﾁ､ｬ､｢､�､ﾐ｡｢ﾂ霹�ﾃﾊ､�ｽ�､ｯ､ｫ､筅ｷ､�､ﾞ､ｻ､�｡｣

ｸｽｾﾝ

NetBSD､ﾋ､ﾆw3m-0.5.1､�ﾄｹｻ�ｴﾖｻﾈ､ﾃ､ﾆ､､､�､ﾈ｡｢"No Line"､ﾈ､､､ｦﾉｽｼｨ､ｬｽﾐ､ﾆ･ﾚ｡ｼ･ｸ､�ｳｫ､ｱ､ﾊ､ｯ､ﾊ､�ｻ�､ｬ､｢､�｡｣ ｰ�ﾅﾙ"No Line"､ｬｽﾐ､�､ﾈ｡｢､ｽ､�ｰﾊｹﾟ､ﾏｰ�ﾀﾚ･ﾚ｡ｼ･ｸ､�ｳｫ､ｱ､ﾊ､ｯ､ﾊ､遙｢ ､ｽ､�､ﾇ､篶ｵﾍ�ﾌ�ﾍ�･ﾚ｡ｼ･ｸ､�ｳｫ､ｳ､ｦ､ﾈ､ｹ､�､ﾈ｡｢Segmentation fault､ﾇﾍ�､ﾁ､�｡｣

bookmark､ﾘ､ﾎﾄﾉｲﾃ･ﾚ｡ｼ･ｸ､箋ｫ､ｱ､ﾊ､ｯ､ﾊ､�､ｿ､癸｢｡ﾖｸ螟ﾇbookmark､ｷ､隍ｦ｡ﾗ､ﾈｻﾗ､ﾃ､ﾆ window､�ｳｫ､､､ｿ､ﾞ､ﾞ､ﾋ､ｷ､ﾆ､ｪ､､､ｿ･ﾚ｡ｼ･ｸ､�bookmark､ｹ､�ｻ�､筅ﾇ､ｭ､ﾊ､､｡｣

ｷ�ﾏﾀ

fdopen､ﾇopen､ｷ､ｿpipe､�･ｯ･�｡ｼ･ｺ､ｹ､�ｺﾝ､ﾋ､ﾏfclose､ﾇ･ｯ･�｡ｼ･ｺ､ｷ､ﾊ､ｱ､�､ﾐ､ﾊ､鬢ﾊ､､､ｬ｡｢ fclose､ﾇ､ﾏ､ﾊ､ｯpclose､�ｻﾈ､ﾃ､ﾆ､､､ｿ､ｿ､癸｢pipe､�･ｯ･�｡ｼ･ｺ､ﾇ､ｭ､ﾆ､､､ﾊ､､｡｣

･ﾐ･ｰ､ﾎﾈｯｸｫﾊ�ﾋ｡

､ﾊ､ﾋ､ﾏ､ﾈ､筅｢､�｡｢ktrace

､ﾞ､ｺｲｿ､ｬｵｯ､ｳ､ﾃ､ﾆ､､､�､ｫ､�ﾃﾎ､�､ｿ､癸｢ktrace､ﾇw3m､�ｵｯﾆｰ｡｣

$ ktrace w3m -v

"No Line"､ｬﾈｯﾀｸ､ｹ､�､ﾞ､ﾇ｡｢･ｦ･ｧ･ﾖ･ﾖ･鬣ｦ･ｸ･�･ｰ､ｷ､ﾞ､ｯ､�｡｣ "No Line"､ｬｽﾐ､ｿ､鬘｢kdump､ﾇtrace data､�ｺ�ﾀｮ｡｣ﾃ豼ﾈ､�ｸｫ､ﾆ､ﾟ､�｡｣

$ kdump > log
$ vim log

log､�ｲｼ､ｫ､鮑ｫ､ﾆ､､､ｯ､ﾈ｡｢､｢､荀ｷ､ｲ､ﾊｹﾔ､ｬ｡｣

21910 w3m      CALL  pipe
21910 w3m      RET   pipe -1 errno 24 Too many open files

､ﾕ､爍｣pipe､�･ｪ｡ｼ･ﾗ･�､ｷ､隍ｦ､ﾈ､ｹ､�､ｬ｡｢ｴ�､ﾋ･ﾕ･｡･､･�､�ｳｫ､ｭ､ｹ､ｮ､ﾇｼｺﾇﾔ､ｷ､ﾆ､､､�､隍ｦ､ﾀ｡｣ pclose､ｷﾋｺ､�､ﾆ､､､�､ﾎ､ﾀ､�､ｦ､ｫ｡｣

fstat､ﾇ･ｪ｡ｼ･ﾗ･�､ｷ､ﾆ､､､�･ﾕ･｡･､･�､ﾎｾ�ﾂﾖ､�ｸｫ､�

･ｪ｡ｼ･ﾗ･�､ｷ､ﾆ､､､�･ﾕ･｡･､･�ｿ�､ｬﾂｿ､ｹ､ｮ､�ｻ�､ｬ､�､ｫ､ﾃ､ｿ､ﾎ､ﾇ｡｢fstat､ｷ､ﾆ､ﾟ､�｡｣

$ fstat | grep w3m
sakurai  w3mimgdisplay 16161   wd /usr      202753 drwxr-xr-x    7680 r 
sakurai  w3mimgdisplay 16161    0* pipe 0xc38b53d4 <- 0xc38b5e38 r
sakurai  w3mimgdisplay 16161    1* pipe 0xc38b5dac -> 0xc38b508c w
sakurai  w3mimgdisplay 16161    2 /         495627 crw-rw-rw-    null w 
sakurai  w3mimgdisplay 16161    3* unix stream c08d7f40 <-> c08e95c0
sakurai  w3m         4153   wd /usr      202753 drwxr-xr-x    7680 r 
sakurai  w3m         4153    0 /         496850 crw-rw-rw-   ttyp5 rw
sakurai  w3m         4153    1 /         496850 crw-rw-rw-   ttyp5 rw
sakurai  w3m         4153    2 /         496850 crw-rw-rw-   ttyp5 rw
sakurai  w3m         4153    3 /         496850 crw-rw-rw-   ttyp5 rw
sakurai  w3m         4153    4* pipe 0xc38b508c <- 0xc38b5dac r
sakurai  w3m         4153    5* pipe 0xc38b59d8 <- 0x0 r
sakurai  w3m         4153    7* pipe 0xc38b5230 <- 0x0 r
sakurai  w3m         4153    8* pipe 0xc38b5e38 -> 0xc38b53d4 w

w3m､ﾇ･ｦ･ｧ･ﾖ･ﾖ･鬣ｦ･ｸ･�･ｰ､ｷ､ﾆ､､､ｯ､ﾈ｡｢､ﾉ､�､ﾉ､�read open､ｷ､ﾃ､ﾑ､ﾊ､ｷ､ﾎpipe､ｬﾁ�､ｨ､ﾆ､､､ｯ､ﾎ､ｬ､�､ｫ､�｡｣

sakurai  w3mimgdisplay 16161   wd /usr      202753 drwxr-xr-x    7680 r 
sakurai  w3mimgdisplay 16161    0* pipe 0xc38b53d4 <- 0xc38b5e38 r
sakurai  w3mimgdisplay 16161    1* pipe 0xc38b5dac -> 0xc38b508c w
sakurai  w3mimgdisplay 16161    2 /         495627 crw-rw-rw-    null w 
sakurai  w3mimgdisplay 16161    3* unix stream c08d7f40 <-> c08e95c0
sakurai  w3m         4153   wd /usr      202753 drwxr-xr-x    7680 r 
sakurai  w3m         4153    0 /         496850 crw-rw-rw-   ttyp5 rw
sakurai  w3m         4153    1 /         496850 crw-rw-rw-   ttyp5 rw
sakurai  w3m         4153    2 /         496850 crw-rw-rw-   ttyp5 rw
sakurai  w3m         4153    3 /         496850 crw-rw-rw-   ttyp5 rw
sakurai  w3m         4153    4* pipe 0xc38b508c <- 0xc38b5dac r
sakurai  w3m         4153    5* pipe 0xc38b59d8 <- 0x0 r
sakurai  w3m         4153    7* pipe 0xc38b5230 <- 0x0 r
sakurai  w3m         4153    8* pipe 0xc38b5e38 -> 0xc38b53d4 w
sakurai  w3m         4153    9* pipe 0xc38b52bc <- 0x0 r
sakurai  w3m         4153   10* pipe 0xc38b57a8 <- 0x0 r

､ｳ､�､ﾏ､ﾞ､ｹ､ﾞ､ｹ｡｢pclose､ｷ､ﾆ､､､ﾊ､､ｲﾄﾇｽﾀｭ､ｬｹ筅､｡｣ ､ﾀ､ｱ､ﾉ､ｽ､筅ｽ､筍｢pipe､�ｲｿ､ﾋｻﾈ､ﾃ､ﾆ､､､�､ﾎ､ﾀ､�､ｦ? ｾ蠏ｭ､ﾎ･�･ｰ､ﾇ､ﾏ｡｢0x0､ｫ､駻ead､ｷ､ﾆ､､､�､ﾎ､ﾇ｡｢pipe､ﾎwriteﾂｦ､ﾎ･ﾗ･�･ｰ･鬣爨ﾏ､ﾁ､网�､ﾈclose､ｷ､ﾆ､､､�､隍ｦ､ﾀ､ｬ｡｣

w3m､ﾇ･｢･ｯ･ｻ･ｹ､ｷ､ﾊ､ｬ､馭stat､�､ｯ､�ﾊﾖ､ｷ､ﾆ､､､�､ﾈ｡｢､ｿ､ﾞ､ｿ､ﾞ0x0､ﾇ､ﾏ､ﾊ､､ｿ�ﾃﾍ､ｬｽﾐ､ﾆ､ｭ､ｿ｡｣

sakurai  gunzip      9102   wd /usr      202753 drwxr-xr-x    7680 r 
sakurai  gunzip      9102    0* pipe 0xc38b5a64 <- 0x0 r
sakurai  gunzip      9102    1* pipe 0xc38b5578 -> 0xc38b5d20 w
sakurai  gunzip      9102    2* pipe 0xc38b5578 -> 0xc38b5d20 w
...
sakurai  w3m         7467   11* pipe 0xc38b5d20 <- 0xc38b5578 r

､ﾊ､�､ﾛ､ﾉ｡｣gunzip､ｬpipe､ﾋwrite､ｷ､ﾆ｡｢w3m､ｬ､ｽ､ﾎpipe､�read､ｷ､ﾆ､､､�､ﾎ､ｫ｡｣ ､ﾉ､ｦ､荀鬘｢gzip､ﾎ･ﾇ･ｳ｡ｼ･ﾉ､�ｹﾔ､ｦ､ﾈ｡｢･ｪ｡ｼ･ﾗ･�､ｷ､ｿ､ﾞ､ﾞ､ﾎpipe､ｬﾁ�､ｨ､ﾆ､､､ｯ､隍ｦ､ﾀ｡｣

w3m､ﾎ･ｽ｡ｼ･ｹ､ｫ､馮zip､ﾎｽ靉�ﾉ�､�ﾃｵ､ｹ

w3m､ﾎ･ｽ｡ｼ･ｹ､�"gzip"､ﾇgrep､ｹ､�｡｣

$ grep gzip *
config.h:#define GUNZIP_CMDNAME  "gzip"
file.c:    { CMP_COMPRESS, ".gz", "application/x-gzip",
file.c:      0, GUNZIP_CMDNAME, GUNZIP_NAME, "gzip", 
file.c:      {"gzip", "x-gzip", NULL} }, 
url.c:    {"gz", "application/x-gzip"},

･ｽ｡ｼ･ｹ･ｳ｡ｼ･ﾉﾆ筅ﾇ､ﾏ｡｢GUNZIP_CMDNAME､ﾈ､､､ｦdefine､�ｻﾈ､ﾃ､ﾆ､､､�､ﾎ､ｫ｡｣ ｼ｡､ﾋGUNZIP_CMDNAME､ﾇgrep｡｣

$ grep GUNZIP_CMDNAME *
config.h:#define GUNZIP_CMDNAME  "gzip"
config.h:#define GUNZIP_CMDNAME  "gunzip"
file.c:      0, GUNZIP_CMDNAME, GUNZIP_NAME, "gzip", 
file.c:      0, GUNZIP_CMDNAME, GUNZIP_NAME, "compress",
file.c:    char *expand_cmd = GUNZIP_CMDNAME;

file.c､�ｸｫ､ﾆ､ﾟ､�､ﾈ｡｢uncompress_stream()､ﾇGUNZIP_CMDNAME､�ｻﾈ､ﾃ､ﾆ､､､ｿ｡｣ uncompress_stream()､ﾎｺﾇｸ螟ﾋ､ﾏ｡｢

uf->stream = newFileStream(f1, (void (*)())pclose);

､ﾈ､｢､�｡｣ stream､�ｺ�､�ｺﾝ､ﾋ｡｢pclose､�ﾅﾏ､ｷ､ﾆ､､､�｡｣ newFileStream()､ﾇ､ﾏ｡｢stream->file.handle->close､ﾋpclose､�ﾂ衄�､ｷ､ﾆ､､､�｡｣ ､ｦ｡ｼ､爍｣､ｪ､ｫ､ｷ､､ｽ熙ﾏｲｿ､筅ﾊ､､､ｾ｡｣

pipe､ﾎｾ�ｹ遉ﾋ､ﾏ｡｢file.handle->close()､ｬｸﾆ､ﾐ､�､ﾆ､､､ﾊ､､､ﾎ､ｫ?

pclose､ｬｸﾆ､ﾐ､�､ﾆ､､､�､ﾎ､ｫ､�ｸ｡ｾﾚ

uncompress_stream()､ﾏexamineFile()､ｫ､鬘｢examineFile()､ﾏloadFile()､ｫ､鮑ﾆ､ﾐ､�､ﾆ､､､�｡｣ loadFile()､ﾏｰﾊｲｼ､ﾎ､隍ｦ､ﾋ､ﾊ､ﾃ､ﾆ､､､�｡｣

Buffer *
loadFile(char *path)
{
    Buffer *buf;
    URLFile uf;
    init_stream(&uf, SCM_LOCAL, NULL);
    examineFile(path, &uf);
    if (uf.stream == NULL)
    return NULL;
    buf = newBuffer(INIT_BUFFER_WIDTH);
    current_content_length = 0;
#ifdef USE_M17N
    content_charset = 0;
#endif
    buf = loadSomething(&uf, path, loadBuffer, buf);
    UFclose(&uf);
    return buf;
}

UFclose､ﾏ･ﾞ･ｯ･�､ﾇISclose､�ｸﾆ､�､ﾇ､､､ﾆ｡｢ ISclose()､ﾇ､ﾏ｡｢file_closeｷﾐﾍｳ､ﾇclose､ﾋ･ｻ･ﾃ･ﾈ､ｵ､�､ｿｴﾘｿ�､�ｸﾆ､�､ﾇ､､､�｡｣

file_closeﾆ筅ﾇ｡｢pclose､ﾎ･ｷ･�･ﾜ･�､ﾈclose､ﾎﾃﾍ､�ｽﾐﾎﾏ､ｷ､ﾆ､ﾟ､�｡｣

printf("close=%p, pclose=%p\n", handle->close, pclose);

､ｹ､�､ﾈ｡｢ﾆｱ､ｸﾃﾍ､�ｽﾐﾎﾏ､ｹ､�｡｣ ､ﾈ､､､ｦｻ�､ﾏ｡｢､ﾁ､网�､ﾈ･ｯ･�｡ｼ･ｺｴﾘｿ�､ﾋpclose､ﾏﾅﾏ､ｵ､�｡｢pclose､ｬｸﾆ､ﾐ､�､ﾆ､､､�ｻ�､ﾋ､ﾊ､�｡｣

pclose､ﾇ､ﾏ･ｯ･�｡ｼ･ｺ､ﾇ､ｭ､ﾊ､､pipe､ｬ､｢､�?

､ｦ､ｦ､爍｣pclose､ﾏｸﾆ､ﾐ､�､ﾆ､､､�､ﾎ､ﾋ｡｢pipe､ｬclose､ｵ､�､ﾊ､､､ﾈ､ﾏ､ﾉ､ｦ､､､ｦｻ�､ﾀ?

､ｷ､ﾐ､ｷﾇｺ､爍｣

､ﾈ､熙｢､ｨ､ｺ｡｢pclose､ﾎﾌ皃�ﾃﾍ､ﾇ､篆ﾐ､ｷ､ﾆ､ﾟ､隍ｦ｡｣ handle->close､ﾎﾌ皃�ﾃﾍ､�ｽﾐﾎﾏ､ｹ､�､ﾈ｡｢-1､ﾀ､ﾃ､ｿ｡｣ -1､ﾃ､ﾆｲｿ､ﾀ?

$ man pclsoe
...
The ppcclloossee() function returns -1 if stream is not associated with a
``popened'' command, if stream has already been ``pclosed'',

popen､ｵ､�､ﾆ､､､ﾊ､､･ﾕ･｡･､･�､�pclose､ｹ､�､ﾈ｡｢-1､ｬﾊﾖ､�､隍ｦ､ﾀ｡｣ ､ｨ? popen､ｵ､�､ﾆ､､､ﾊ､､??? ･ﾑ･､･ﾗ､ﾊ､ﾎ､ﾋ?

pipe､�･ｪ｡ｼ･ﾗ･�､ｹ､�ﾊ�ﾋ｡､ﾏ｡｢popen､ﾀ､ｱ､ﾇ､ﾏ､ﾊ､､

､筅ｦｰ�ﾅﾙuncompress_stream()､�ｸｫ､ﾆ､ﾟ､�｡｣ pipe､ﾏopen_pipe_rw()､ﾇ･ｪ｡ｼ･ﾗ･�､ｷ､ﾆ､､､�､隍ｦ､ﾀ｡｣

open_pipe_rw､�ｸｫ､�､ﾈ｡ﾄ

if (fr && pipe(fdr) < 0)
goto err0;
if (fw && pipe(fdw) < 0)
goto err1;
...
*fr = fdopen(fdr[0], "r");

､｢､�? popen()､ｸ､网ﾊ､ｯ､ﾆpipe()､ﾇ･ﾑ･､･ﾗ､�ｺ�ﾀｮ､ｷ､ﾆ｡｢､ｽ､�､ﾋﾂﾐ､ｷ､ﾆfdopen､ｷ､ﾆ､､､�｡｣ ﾀ隍ﾎpclose､ﾎman､ﾋ､隍�､ﾈ｡｢pclose､ｹ､�､ﾋ､ﾏpopen､ｷ､ｿ･ﾕ･｡･､･�､ｸ､网ﾊ､ｭ､罕ﾀ･癸｣ ､ﾈ､､､ｦｻ�､ﾏ｡｢pipe､ﾈfdopen､ﾇ･ｪ｡ｼ･ﾗ･�､ｷ､ｿ･ﾕ･｡･､･�､ﾏ｡｢fclose､ｷ､ﾊ､ｯ､ﾁ､罕ﾀ･皃ﾊ､�､ｸ､网ﾊ､ｫ､�､ｦ､ｫ｡｣

､ﾈ､､､ｦ､�､ｱ､ﾇ｡｢uncompress_stream､ﾎ

   uf->stream = newFileStream(f1, (void (*)())pclose);

､�｡｢

   uf->stream = newFileStream(f1, (void (*)())fclose);

､ﾈﾊﾑ､ｨ､ﾆ､ﾟ､ｿ｡｣

ﾊﾑｹｹ､ｷ､ｿw3m､ﾏfstat､ﾇｳﾎﾇｧ､ｷ､ﾆ､筍｢･ｪ｡ｼ･ﾗ･�､ｷ､ｿ､ﾞ､ﾞ､ﾎpipe､ﾏﾁ�､ｨ､ﾊ､ｯ､ﾊ､ﾃ､ｿ｡｣