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Print file names without stdio buffering to avoid mixing buffered and

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unbuffered ouput.

PR:		bin/176886
Reviewed by:	mjg
This commit is contained in:
Jaakko Heinonen 2013-06-09 08:06:26 +00:00
parent 2a82581d9b
commit 849d265d53
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=251565
4 changed files with 18 additions and 5 deletions
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1
usr.bin/tail/extern.h
View File

@ -67,5 +67,6 @@ void ierr(const char *);
void oerr(void);
int mapprint(struct mapinfo *, off_t, off_t);
int maparound(struct mapinfo *, off_t);
void printfn(const char *, int);
extern int Fflag, fflag, qflag, rflag, rval, no_files;

4
usr.bin/tail/forward.c
View File

@ -243,7 +243,7 @@ show(file_info_t *file)
while ((ch = getc(file->fp)) != EOF) {
if (last != file && no_files > 1) {
if (!qflag)
(void)printf("\n==> %s <==\n", file->file_name);
printfn(file->file_name, 1);
last = file;
}
if (putchar(ch) == EOF)
@ -320,7 +320,7 @@ follow(file_info_t *files, enum STYLE style, off_t off)
active = 1;
n++;
if (no_files > 1 && !qflag)
(void)printf("\n==> %s <==\n", file->file_name);
printfn(file->file_name, 1);
forward(file->fp, file->file_name, style, off, &file->st);
if (Fflag && fileno(file->fp) != STDIN_FILENO)
n++;

14
usr.bin/tail/misc.c
View File

@ -113,3 +113,17 @@ maparound(struct mapinfo *mip, off_t offset)
return (0);
}
/*
* Print the file name without stdio buffering.
*/
void
printfn(const char *fn, int print_nl)
{
if (print_nl)
WR("\n", 1);
WR("==> ", 4);
WR(fn, strlen(fn));
WR(" <==\n", 5);
}

4
usr.bin/tail/tail.c
View File

@ -203,10 +203,8 @@ main(int argc, char *argv[])
continue;
}
if (argc > 1 && !qflag) {
(void)printf("%s==> %s <==\n",
first ? "" : "\n", fn);
printfn(fn, !first);
first = 0;
(void)fflush(stdout);
}
if (rflag)