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authorRob Landley <rob@landley.net>2016-02-04 14:10:36 -0600
committerRob Landley <rob@landley.net>2016-02-04 14:10:36 -0600
commitc02619bbc0acbb2b4588933ec1bbb7b7026adbb6 (patch)
tree3f53e640342f45a1199442a1c90a5300f797bdca /toys/posix
parentf42356f850c64fb3b2cd23595789fb4daf03f35b (diff)
downloadtoybox-c02619bbc0acbb2b4588933ec1bbb7b7026adbb6.tar.gz
Fix -H and -n with -ABC, and add tests.
Diffstat (limited to 'toys/posix')
-rw-r--r--toys/posix/grep.c56
1 files changed, 32 insertions, 24 deletions
diff --git a/toys/posix/grep.c b/toys/posix/grep.c
index 92d723bb..d02dd9eb 100644
--- a/toys/posix/grep.c
+++ b/toys/posix/grep.c
@@ -62,17 +62,28 @@ GLOBALS(
long a;
long b;
long c;
+
+ char indelim, outdelim;
)
+// Emit line with various potential prefixes and delimiter
+static void outline(char *line, char dash, char *name, long lcount, long bcount,
+ int trim)
+{
+ if (name && (toys.optflags&FLAG_H)) printf("%s%c", name, dash);
+ if (!line || (lcount && (toys.optflags&FLAG_n)))
+ printf("%ld%c", lcount, line ? dash : TT.outdelim);
+ if (bcount && (toys.optflags&FLAG_b)) printf("%ld%c", bcount-1, dash);
+ if (line) xprintf("%.*s%c", trim ? trim : INT_MAX, line, TT.outdelim);
+}
+
// Show matches in one file
static void do_grep(int fd, char *name)
{
struct double_list *dlb = 0;
FILE *file = fdopen(fd, "r");
- long offset = 0, after = 0, before = 0;
- int lcount = 0, mcount = 0;
- char *bars = 0, indelim = '\n' * !(toys.optflags&FLAG_z),
- outdelim = '\n' * !(toys.optflags&FLAG_Z);
+ long lcount = 0, mcount = 0, offset = 0, after = 0, before = 0;
+ char *bars = 0;
if (!fd) name = "(standard input)";
@@ -90,8 +101,8 @@ static void do_grep(int fd, char *name)
int mmatch = 0;
lcount++;
- if (0 > (len = getdelim(&line, &unused, indelim, file))) break;
- if (line[len-1] == indelim) line[len-1] = 0;
+ if (0 > (len = getdelim(&line, &unused, TT.indelim, file))) break;
+ if (line[len-1] == TT.indelim) line[len-1] = 0;
start = line;
@@ -178,7 +189,7 @@ static void do_grep(int fd, char *name)
toys.exitval = 0;
if (toys.optflags & FLAG_q) xexit();
if (toys.optflags & FLAG_l) {
- printf("%s%c", name, outdelim);
+ xprintf("%s%c", name, TT.outdelim);
free(line);
fclose(file);
return;
@@ -188,28 +199,23 @@ static void do_grep(int fd, char *name)
break;
if (!(toys.optflags & FLAG_c)) {
- if (toys.optflags & FLAG_H) printf("%s:", name);
- if (toys.optflags & FLAG_n) printf("%d:", lcount);
- if (toys.optflags & FLAG_b)
- printf("%ld:", offset + (start-line) +
- ((toys.optflags & FLAG_o) ? matches.rm_so : 0));
+ long bcount = 1 + offset + (start-line) +
+ ((toys.optflags & FLAG_o) ? matches.rm_so : 0);
+
if (!(toys.optflags & FLAG_o)) {
while (dlb) {
struct double_list *dl = dlist_pop(&dlb);
- xprintf("%s%c", dl->data, outdelim);
+ outline(dl->data, '-', name, lcount-before, 0, 0);
free(dl->data);
free(dl);
before--;
}
- while (before) xprintf("%s%c", line, outdelim);
- xprintf("%s%c", line, outdelim);
+ outline(line, ':', name, lcount, bcount, 0);
if (TT.a) after = TT.a+1;
- } else {
- xprintf("%.*s%c", (int)(matches.rm_eo-matches.rm_so),
- start+matches.rm_so, outdelim);
- }
+ } else outline(start+matches.rm_so, ':', name, lcount, bcount,
+ matches.rm_eo-matches.rm_so);
}
start += skip;
@@ -222,7 +228,7 @@ static void do_grep(int fd, char *name)
int discard = (after || TT.b);
if (after && --after) {
- xprintf("%s%c", line, outdelim);
+ outline(line, '-', name, lcount, 0, 0);
discard = 0;
}
if (discard && TT.b) {
@@ -237,6 +243,8 @@ static void do_grep(int fd, char *name)
before--;
} else discard = 0;
}
+ // If we discarded a line while displaying context, show bars before next
+ // line (but don't show them now in case that was last match in file)
if (discard && mcount) bars = "--";
}
free(line);
@@ -244,10 +252,7 @@ static void do_grep(int fd, char *name)
if ((toys.optflags & FLAG_m) && mcount >= TT.m) break;
}
- if (toys.optflags & FLAG_c) {
- if (toys.optflags & FLAG_H) printf("%s:", name);
- xprintf("%d%c", mcount, outdelim);
- }
+ if (toys.optflags & FLAG_c) outline(0, ':', name, mcount, 0, 0);
// loopfiles will also close the fd, but this frees an (opaque) struct.
fclose(file);
@@ -338,6 +343,9 @@ void grep_main(void)
if (!TT.a) TT.a = TT.c;
if (!TT.b) TT.b = TT.c;
+ TT.indelim = '\n' * !(toys.optflags&FLAG_z);
+ TT.outdelim = '\n' * !(toys.optflags&FLAG_Z);
+
// Handle egrep and fgrep
if (*toys.which->name == 'e') toys.optflags |= FLAG_E;
if (*toys.which->name == 'f') toys.optflags |= FLAG_F;