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trincat(1): removed file

This commit is contained in:
Emma Tebibyte 2023-08-07 20:39:32 -06:00
parent c8d6e9f5e4
commit 27a227e365
Signed by untrusted user: emma
GPG Key ID: 6D661C738815E7DD
1 changed files with 0 additions and 78 deletions

View File

@ -1,78 +0,0 @@
#include <errno.h> /* maybe */
#include <fcntl.h> /* no */
#include <sysexits.h> /* sure */
#include <stdbool.h> /* no */
#include <stdio.h> /* yes */
#include <stdlib.h> /* yes */
#include <string.h> /* maybe */
#include <unistd.h> /* yes */
#define BUF_SIZE 4096
unsigned char u = 0; /* unbuffered */
unsigned char buf[BUF_SIZE];
void usage(char *argv0){
fprintf(stderr, "Usage: %s (-u) (file...)\n", argv0);
exit(EX_USAGE);
}
int main(int argc, char *argv[]) {
char *argv0;
extern int optind;
int c;
FILE *in;
argv0 = argv[0];
while ((c = getopt(argc, argv, "u")) != -1) {
switch(c) {
/*
* From cat(1p):
*
* -u Write bytes from the input file to the standard output
* without delay as each is read.
*/
case 'u':
u = 1;
break;
default:
usage(argv[0]);
}
}
while(++argv != NULL) /* increments over argv[0] */
/*
* From cat(1p):
*
* file A pathname of an input file. If no file operands are
* specified, the standard input shall be used. If a file is
* '-', the cat utility shall read from the standard input at
* that point in the sequence. The cat utility shall not close
* and reopen standard input when it is referenced in this way,
* but shall accept multiple occurrences of '-' as a file
* operand.
*/
if(argv[0][0] == '-' && argv[0][1] == '\0') in = stdin;
else if ((in = fopen(argv[0], "r")) == NULL) {
// TODO: Add error handling
usage(argv0);
return EX_NOINPUT;
}
int byte = 0;
char *buf = calloc(4096, 1);
while ((c = fgetc(in) != EOF)) {
if (u) {
putchar(c);
} else {
/* fucky wucky buffering */
}
}
if(!u) fputs(buf, stdout);
if(in != stdin) fclose(file); /* who cares if it cant close */
}
return EX_OK;
}