diff options
| -rw-r--r-- | src/Makefile | 5 | ||||
| -rw-r--r-- | src/readahead.c | 56 |
2 files changed, 60 insertions, 1 deletions
diff --git a/src/Makefile b/src/Makefile index bf012f1..3ef21f5 100644 --- a/src/Makefile +++ b/src/Makefile @@ -4,7 +4,7 @@ LD = gcc #BIN_TARGETS = splashbard #SBIN_TARGETS = runscript start-stop-daemon -SBIN_TARGETS = runscript +SBIN_TARGETS = runscript readahead TARGET = $(BIN_TARGETS) $(SBIN_TARGETS) .PHONY: all clean @@ -13,6 +13,9 @@ all: $(TARGET) tsplashd: splashbard.c $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< +readahead: readahead.c + $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< + runscript: runscript.c $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< diff --git a/src/readahead.c b/src/readahead.c new file mode 100644 index 0000000..9d44788 --- /dev/null +++ b/src/readahead.c @@ -0,0 +1,56 @@ +#include <stdlib.h> +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> +#include <fcntl.h> +#include <sysexits.h> + +static const char *program = "readahead"; + +void usage(void) { + printf("usage: %s [-hv] FILE [...]\n", program); + exit(EX_USAGE); +} + +int main( int argc, char *argv[]) { + int c, verbose=0; + + /* parse options */ + while ( (c = getopt(argc, argv, "hv")) >= 0 ) { + switch (c) { + case 'v': verbose++; + break; + case 'h': + default: usage(); + break; + } + } + + /* check that at least one file is specified */ + if (optind == argc) + usage(); + + /* parse files */ + c = EX_OK; + while (optind < argc) { + struct stat st; + FILE *f = fopen(argv[optind], "r"); + + + /* check that file exists */ + if (f == NULL) { + perror(argv[optind]); + c = EX_NOINPUT; + } else { + stat(argv[optind], &st); + readahead( fileno(f), 0, (size_t)st.st_size ); + if (verbose) + printf("%s\n", argv[optind]); + fclose(f); + } + optind++; + } + return (c); +} + |