| 1 | /* |
| 2 | |
| 3 | filecat |
| 4 | |
| 5 | does nothing more than copy standard input to standard |
| 6 | output, like the cat command, but reports write errors. |
| 7 | Takes no arguments. |
| 8 | Uses getc and putc rather than fwrite and fread because |
| 9 | the latter call getc and putc. |
| 10 | |
| 11 | Exit codes: |
| 12 | 0 ok |
| 13 | 1 error on read |
| 14 | 2 error on write |
| 15 | |
| 16 | */ |
| 17 | # include <stdio.h> |
| 18 | main(){ |
| 19 | char c,sOutbuf[BUFSIZ]; |
| 20 | |
| 21 | setbuf(stdout,sOutbuf); |
| 22 | |
| 23 | while((c = getc(stdin)) != EOF){ |
| 24 | putc(c,stdout); |
| 25 | if(ferror(stdout)){ |
| 26 | perror("filecat: stdout"); |
| 27 | exit(2); |
| 28 | } |
| 29 | } |
| 30 | if(ferror(stdin)){ |
| 31 | perror("filecat: stdin"); |
| 32 | exit(1); |
| 33 | } |
| 34 | fclose(stdin); |
| 35 | fclose(stdout); |
| 36 | exit(0); |
| 37 | } |