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Print header in tail(1)

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sin 2014-11-20 23:09:14 +00:00
parent 159cc298c4
commit d221e5ea5b
1 changed files with 7 additions and 1 deletions
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8
tail.c
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@ -24,6 +24,7 @@ main(int argc, char *argv[])
void (*tail)(FILE *, const char *, long) = taketail; void (*tail)(FILE *, const char *, long) = taketail;
char *lines; char *lines;
int ret = 0; int ret = 0;
int newline, many;
ARGBEGIN { ARGBEGIN {
case 'n': case 'n':
@ -41,12 +42,17 @@ main(int argc, char *argv[])
if (argc == 0) { if (argc == 0) {
tail(stdin, "<stdin>", n); tail(stdin, "<stdin>", n);
} else { } else {
for (; argc > 0; argc--, argv++) { many = argc > 1;
for (newline = 0; argc > 0; argc--, argv++) {
if (!(fp = fopen(argv[0], "r"))) { if (!(fp = fopen(argv[0], "r"))) {
weprintf("fopen %s:", argv[0]); weprintf("fopen %s:", argv[0]);
ret = 1; ret = 1;
continue; continue;
} }
if (many)
printf("%s==> %s <==\n",
newline ? "\n" : "", argv[0]);
newline = 1;
tail(fp, argv[0], n); tail(fp, argv[0], n);
fclose(fp); fclose(fp);
} }