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Fix build of usr.bin/tail with GCC

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Submitted by:	pluknet
Reported by:	pluknet
MFC after:	27 days
X-MFC-with:	311895
Sponsored by:	Spectra Logic Corp
This commit is contained in:
Alan Somers 2017-01-11 16:09:25 +00:00
parent bccef7f6d9
commit 43e9ad02f6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=311928
1 changed files with 11 additions and 7 deletions
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18
usr.bin/tail/reverse.c
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@ -170,11 +170,11 @@ r_reg(FILE *fp, const char *fn, enum STYLE style, off_t off, struct stat *sbp)
ierr(fn);
}
static const size_t bsz = 128 * 1024;
#define BSZ (128 * 1024)
typedef struct bfelem {
TAILQ_ENTRY(bfelem) entries;
size_t len;
char l[bsz];
char l[BSZ];
} bfelem_t;
/*
@ -190,8 +190,8 @@ typedef struct bfelem {
static void
r_buf(FILE *fp, const char *fn)
{
struct bfelem *tl, *temp, *first = NULL;
size_t len, llen;
struct bfelem *tl, *first = NULL;
size_t llen;
char *p;
off_t enomem = 0;
TAILQ_HEAD(bfhead, bfelem) head;
@ -199,6 +199,8 @@ r_buf(FILE *fp, const char *fn)
TAILQ_INIT(&head);
while (!feof(fp)) {
size_t len;
/*
* Allocate a new block and link it into place in a doubly
* linked list. If out of memory, toss the LRU block and
@ -216,9 +218,9 @@ r_buf(FILE *fp, const char *fn)
/* Fill the block with input data. */
len = 0;
while ((!feof(fp)) && len < bsz) {
while ((!feof(fp)) && len < BSZ) {
p = tl->l + len;
len += fread(p, 1, bsz - len, fp);
len += fread(p, 1, BSZ - len, fp);
if (ferror(fp)) {
ierr(fn);
return;
@ -244,6 +246,8 @@ r_buf(FILE *fp, const char *fn)
tl = TAILQ_LAST(&head, bfhead);
first = TAILQ_FIRST(&head);
while (tl != NULL) {
struct bfelem *temp;
for (p = tl->l + tl->len - 1, llen = 0; p >= tl->l;
--p, ++llen) {
int start = (tl == first && p == tl->l);
@ -251,7 +255,7 @@ r_buf(FILE *fp, const char *fn)
if ((*p == '\n') || start) {
struct bfelem *tr;
if (start && len)
if (start && llen)
WR(p, llen + 1);
else if (llen)
WR(p + 1, llen);