sh: Rework code to remove '\0' from shell input.
This fixes bugs where '\0' was not removed correctly and speeds up the parser.
This commit is contained in:
parent
34b133bcd5
commit
dcd95d8a01
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=295825
@ -195,8 +195,7 @@ preadfd(void)
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int
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int
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preadbuffer(void)
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preadbuffer(void)
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{
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{
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char *p, *q;
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char *p, *q, *r, *end;
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int more;
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char savec;
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char savec;
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while (parsefile->strpush) {
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while (parsefile->strpush) {
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@ -224,34 +223,31 @@ preadbuffer(void)
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}
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}
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}
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}
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q = p = parsefile->buf + (parsenextc - parsefile->buf);
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p = parsefile->buf + (parsenextc - parsefile->buf);
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end = p + parselleft;
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/* delete nul characters */
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*end = '\0';
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for (more = 1; more;) {
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q = strchrnul(p, '\n');
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switch (*p) {
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if (q != end && *q == '\0') {
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case '\0':
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/* delete nul characters */
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p++; /* Skip nul */
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for (r = q; q != end; q++) {
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goto check;
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if (*q != '\0')
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*r++ = *q;
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case '\n':
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parsenleft = q - parsenextc;
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more = 0; /* Stop processing here */
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break;
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default:
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break;
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}
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*q++ = *p++;
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check:
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if (--parselleft <= 0) {
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parsenleft = q - parsenextc - 1;
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if (parsenleft < 0)
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goto again;
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*q = '\0';
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more = 0;
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}
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}
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parselleft -= end - r;
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if (parselleft == 0)
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goto again;
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end = p + parselleft;
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*end = '\0';
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q = strchrnul(p, '\n');
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}
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}
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if (q == end) {
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parsenleft = parselleft;
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parselleft = 0;
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} else /* *q == '\n' */ {
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parsenleft = q - parsenextc + 1;
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parselleft -= parsenleft;
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}
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parsenleft--;
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savec = *q;
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savec = *q;
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*q = '\0';
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*q = '\0';
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@ -73,6 +73,7 @@ FILES+= line-cont10.0
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FILES+= line-cont11.0
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FILES+= line-cont11.0
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FILES+= no-space1.0
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FILES+= no-space1.0
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FILES+= no-space2.0
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FILES+= no-space2.0
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FILES+= nul1.0
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FILES+= only-redir1.0
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FILES+= only-redir1.0
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FILES+= only-redir2.0
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FILES+= only-redir2.0
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FILES+= only-redir3.0
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FILES+= only-redir3.0
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12
bin/sh/tests/parser/nul1.0
Normal file
12
bin/sh/tests/parser/nul1.0
Normal file
@ -0,0 +1,12 @@
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# $FreeBSD$
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# Although POSIX does not specify the effect of NUL bytes in scripts,
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# we ignore them.
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{
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printf 'v=%03000d\0%02000d' 7 2
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dd if=/dev/zero bs=1000 count=1 status=none
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printf '1 w=%03000d%02000d1\0\n' 7 2
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printf '\0l\0v\0=\0$\0{\0#\0v\0}\n'
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printf '\0l\0w\0=\0\0$\0{\0#\0w}\0\0\0\n'
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printf '[ "$lv.$lw.$v" = "5001.5001.$w" ]\n'
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} | ${SH}
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