#include /* mycat: concatenate files */ void filecopy(FILE *, FILE *); int main(int argc, char *argv[]){ FILE *fp; if (argc == 1){ /* no args, copy standard input */ filecopy(stdin, stdout); }else{ while (--argc > 0){ if ((fp = fopen(*++argv, "r")) == NULL) { printf("cat: cannot open %s\n", *argv); return 1; } else { filecopy(fp, stdout); fclose(fp); } } } return 0; } /* filecopy: copy file ifp to file ofp */ #include void filecopy(FILE *ifp, FILE *ofp) { int c; while ((c = getc(ifp)) != EOF) putc(c,ofp); }
#include /* mycat: concatenate files */ void filecopy(FILE *, FILE *); int main(int argc, char *argv[]){ FILE *fp; if (argc == 1){ /* no args, copy standard input */ filecopy(stdin, stdout); }else{ while (--argc > 0){ if ((fp = fopen(*++argv, "r")) == NULL) { printf("cat: cannot open %s\n", *argv); return 1; } else { filecopy(fp, stdout); fclose(fp); } } } return 0; } /* filecopy: copy file ifp to file ofp */ #include void filecopy(FILE *ifp, FILE *ofp) { int c; while ((c = getc(ifp)) != EOF) putc(c,ofp); }
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
Related questions
Question
#include <stdio.h> /* mycat: concatenate files */
void filecopy(FILE *, FILE *);
int main(int argc, char *argv[]){ FILE *fp; if (argc == 1){ /* no args, copy standard input */ filecopy(stdin, stdout); }else{ while (--argc > 0){ if ((fp = fopen(*++argv, "r")) == NULL) { printf("cat: cannot open %s\n", *argv); return 1; } else { filecopy(fp, stdout); fclose(fp); } } } return 0; } |
/* filecopy: copy file ifp to file ofp */
#include <stdio.h>
void filecopy(FILE *ifp, FILE *ofp)
{
int c;
while ((c = getc(ifp)) != EOF)
putc(c,ofp);
}
![Use to look at mycat in operation. Type $ strace ./mycat cmd2. sh to see it print to the console
the contents of filecopy.c. You may well see quite a lot of things going on, but we can limit this
to only a
set of system
calls
interested in.
Issue the command:
we
are
$ strace - C - e trace = open, close,read, write ./mycat cmd2. sh
This will limit the output to only the file system calls and also print a summary.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3791440a-f4ca-4b89-aea4-d4d50d97aef2%2Fa3d029a8-e8e0-4b16-b243-323f885bd16d%2Ff9fhuzg_processed.png&w=3840&q=75)
Transcribed Image Text:Use to look at mycat in operation. Type $ strace ./mycat cmd2. sh to see it print to the console
the contents of filecopy.c. You may well see quite a lot of things going on, but we can limit this
to only a
set of system
calls
interested in.
Issue the command:
we
are
$ strace - C - e trace = open, close,read, write ./mycat cmd2. sh
This will limit the output to only the file system calls and also print a summary.
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