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Properly handle multiline patterns in grep(1) 

We should be POSIX compliant now.
This commit is contained in:
sin 2014-11-20 19:56:18 +00:00
parent b6a41b688b
commit 8767e4b320
1 changed files with 16 additions and 10 deletions
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26
grep.c
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@ -12,7 +12,7 @@
enum { Match = 0, NoMatch = 1, Error = 2 };
static void addpattern(const char *);
static void addpatternfile(const char *);
static void addpatternfile(FILE *);
static int grep(FILE *, const char *);
static int Fflag;
@ -47,6 +47,7 @@ main(int argc, char *argv[])
struct pattern *pnode;
int i, m, flags = REG_NOSUB, match = NoMatch;
FILE *fp;
char *arg;
SLIST_INIT(&phead);
@ -61,11 +62,19 @@ main(int argc, char *argv[])
Hflag = 1;
break;
case 'e':
addpattern(EARGF(usage()));
arg = EARGF(usage());
fp = fmemopen(arg, strlen(arg) + 1, "r");
addpatternfile(fp);
fclose(fp);
eflag = 1;
break;
case 'f':
addpatternfile(EARGF(usage()));
arg = EARGF(usage());
fp = fopen(arg, "r");
if (!fp)
enprintf(Error, "fopen %s:", arg);
addpatternfile(fp);
fclose(fp);
fflag = 1;
break;
case 'h':
@ -99,7 +108,9 @@ main(int argc, char *argv[])
/* just add literal pattern to list */
if (!eflag && !fflag) {
addpattern(argv[0]);
fp = fmemopen(argv[0], strlen(argv[0]) + 1, "r");
addpatternfile(fp);
fclose(fp);
argc--;
argv++;
}
@ -163,22 +174,17 @@ addpattern(const char *pattern)
}
static void
addpatternfile(const char *file)
addpatternfile(FILE *fp)
{
FILE *fp;
char *buf = NULL;
size_t len = 0, size = 0;
fp = fopen(file, "r");
if (!fp)
enprintf(Error, "fopen %s:", file);
while ((len = getline(&buf, &size, fp)) != -1) {
if (len && buf[len - 1] == '\n')
buf[len - 1] = '\0';
addpattern(buf);
}
free(buf);
fclose(fp);
}
static int