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dtb 2024-01-19 21:30:40 -07:00
parent 2501cd52d8
commit 88a9425ad7
1 changed files with 10 additions and 17 deletions
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27
mm/mm.c
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@ -61,9 +61,6 @@ static char *wharsh = "wb";
static FILE *
Files_append(struct Files *files, FILE *file, char *name){
if(files->s == -1)
files->s = 0;
if(file == NULL || (files->s == files->a
&& ((files->files = realloc(files->files,
(files->a += (files->a == 0)
@ -123,8 +120,8 @@ int main(int argc, char *argv[]){
int s; /* scratch variable */
/* The simple invocation (without given arguments) requires no memory
* allocations or use of the io structs and is therefore treated as a
* special case. To do the same with all bells and whistles call
* allocations or use of the files structs and is therefore treated as
* a special case. To do the same with all bells and whistles call
* $ mm -i - -o - */
if(argc < 2){ /* simple invocation */
while((c = getc(stdin)) != EOF)
@ -134,11 +131,9 @@ int main(int argc, char *argv[]){
}
/* Initializes the files structs with their default values, standard
* input and standard output. Both files->s are set to -1, a special
* value indicating that they're at their defaults and that their FILE
* pointers won't need to be closed. If an input or an output is
* specified these initial values will be overwritten, so to, say, use
* mm(1) equivalently to tee(1p), -o - will need to be specified before
* input and standard output. If an input or an output is specified
* these initial values will be overwritten, so to, say, use mm(1)
* equivalently to tee(1p), -o - will need to be specified before
* additional files to ensure standard output is still written. */
for(i = 0; i < 2; ++i){
files[i].a = 0;
@ -148,7 +143,7 @@ int main(int argc, char *argv[]){
files[i].names = NULL;
Files_append(&files[i], i == 0 ? stdin : stdout,
i == 0 ? stdin_name : stdout_name);
files[i].s = -1;
files[i].s = 0;
}
s = 0; /* Refers to whether or not files will be unbuffered. */
@ -211,6 +206,9 @@ int main(int argc, char *argv[]){
return EX_USAGE;
}
files[0].s += files[0].s == 0;
files[1].s += files[1].s == 0;
/* Unbuffer files. */
if(s){ for( i = 0;
i < files[0].s;
@ -220,11 +218,6 @@ int main(int argc, char *argv[]){
setvbuf(files[1].files[i++], NULL, _IONBF, 0));
}
if(files[0].s == -1)
files[0].s = 1;
if(files[1].s == -1)
files[1].s = 1;
/* Reflects whether (s==0) or not (s==1) the full length of the inputs
* could be written to all outputs, which is the return value for main
* to maintain feature parity with tee(1p). */
@ -234,8 +227,8 @@ int main(int argc, char *argv[]){
for(i = 0; i < files[0].s; ++i) /* iterate ins */
while((c = getc(files[0].files[i])) != EOF) /* iterate chars */
for(j = 0; j < files[1].s; ++j) /* iterate outs */
/* notebook's full */
if(putc(c, files[1].files[j]) == EOF){
/* notebook's full */
s = 1;
if(fclose(files[1].files[j]) == EOF)
fprintf(stderr, "%s: %s: %s\n",