diff options
Diffstat (limited to 'coreutils/uniq.c')
| -rw-r--r-- | coreutils/uniq.c | 61 |
1 files changed, 46 insertions, 15 deletions
diff --git a/coreutils/uniq.c b/coreutils/uniq.c index 251cf2dec..5f0e192a2 100644 --- a/coreutils/uniq.c +++ b/coreutils/uniq.c @@ -23,6 +23,8 @@ #include "internal.h" #include <stdio.h> +#include <string.h> +#include <errno.h> static const char uniq_usage[] = "haha\n" @@ -105,6 +107,35 @@ subject_study(Subject *self) return self; } +static int +set_file_pointers(int schema, FILE **in, FILE **out, char **argv) +{ + switch (schema) { + case 0: + *in = stdin; + *out = stdout; + break; + case 1: + *in = fopen(argv[0], "r"); + *out = stdout; + break; + case 2: + *in = fopen(argv[0], "r"); + *out = fopen(argv[1], "w"); + break; + } + if (*in == NULL) { + fprintf(stderr, "uniq: %s: %s\n", argv[0], strerror(errno)); + return errno; + } + if (*out == NULL) { + fprintf(stderr, "uniq: %s: %s\n", argv[1], strerror(errno)); + return errno; + } + return 0; +} + + /* one variable is the decision algo */ /* another variable is the printing algo */ @@ -122,20 +153,6 @@ uniq_main(int argc, char **argv) FILE *in, *out; Subject s; - /* init */ - in = stdin; - out = stdout; - - subject_init(&s, in, out, NULL); - while (subject_next(&s)) { - subject_study(&s); - } - subject_last(&s); - subject_study(&s); - exit(0); - - /* XXX : finish the tedious stuff */ - /* parse argv[] */ for (i = 1; i < argc; i++) { if (argv[i][0] == '-') { @@ -152,7 +169,21 @@ uniq_main(int argc, char **argv) } } + /* 0 src: stdin; dst: stdout */ + /* 1 src: file; dst: stdout */ + /* 2 src: file; dst: file */ + if (set_file_pointers((argc - 1), &in, &out, &argv[i])) { + exit(1); + } + + subject_init(&s, in, out, NULL); + while (subject_next(&s)) { + subject_study(&s); + } + subject_last(&s); + subject_study(&s); + exit(0); } -/* $Id: uniq.c,v 1.2 2000/01/06 01:14:56 erik Exp $ */ +/* $Id: uniq.c,v 1.3 2000/01/06 23:49:21 beppu Exp $ */ |