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- /* cat.c: concatenate files */
-
- #include <stdio.h>
- #include <assert.h>
-
- void copy(FILE *, FILE *);
-
- main(int argc, char **argv)
- {
- int i;
- FILE *f;
- FILE *std_out = fdopen(fileno(stdout),"wb");
-
- assert(std_out != NULL);
- for (i = 1; i < argc; ++i)
- if ((f = fopen(argv[i],"rb")) == NULL)
- fprintf(stderr,"cat: Can't open %s\n",argv[i]);
- else
- {
- copy(f,std_out);
- fclose(f);
- }
- return 0;
- }
-
- void copy(FILE *from, FILE *to)
- {
- size_t count;
- static char buf[BUFSIZ];
-
- while (!feof(from))
- {
- count = fread(buf,1,BUFSIZ,from);
- assert(ferror(from) == 0);
- assert(fwrite(buf,1,count,to) == count);
- assert(ferror(to) == 0);
- }
- }
-