split: fixes
- -b argument required, don't allow -b <= 0. - -l argument required, don't allow -l <= 0. - usage() and argument parsing: sort flags. - don't write 0 size file, get rid of goto reproducable with: printf 'a' | split -b 1. - close FILE *in if != stdin. - mark split as finished in README. - codestyle fixes.
This commit is contained in:
Hiltjo Posthuma
parent
5552db75ba
commit
949f930280
2
README
2
README
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@ -60,7 +60,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
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=* setsid non-posix none
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=* sleep yes none
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sort no -m, -o, -d, -f, -i
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split yes none
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=* split yes none
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= sponge non-posix none
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strings no -a, -n, -t
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= sync non-posix none
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204
split.c
204
split.c
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@ -8,107 +8,8 @@
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#include "util.h"
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static int itostr(char *, int, int);
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static FILE *nextfile(FILE *, char *, int, int);
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static void
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usage(void)
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{
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eprintf("usage: split [-d] [-a len] [-b [bytes[k|m|g]]] [-l [lines]] [input [prefix]]\n");
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}
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static int base = 26, start = 'a';
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int
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main(int argc, char *argv[])
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{
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int plen, slen = 2;
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int ch;
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char name[NAME_MAX+1];
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char *prefix = "x";
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char *file = NULL;
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char *tmp, *end;
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size_t size = 1000, scale = 1, n;
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int always = 0;
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FILE *in = stdin, *out = NULL;
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ARGBEGIN {
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case 'b':
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always = 1;
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tmp = ARGF();
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if (!tmp)
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break;
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size = strtoull(tmp, &end, 10);
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if (!*end)
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break;
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switch (toupper((int)*end)) {
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case 'K':
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scale = 1024;
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break;
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case 'M':
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scale = 1024L * 1024L;
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break;
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case 'G':
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scale = 1024L * 1024L * 1024L;
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break;
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default:
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usage();
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}
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if (size > (SIZE_MAX/scale))
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eprintf("'%s': out of range\n", tmp);
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size *= scale;
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break;
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case 'l':
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always = 0;
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tmp = ARGF();
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if (tmp)
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size = estrtonum(tmp, 0, MIN(LLONG_MAX, SIZE_MAX));
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break;
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case 'a':
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slen = estrtonum(EARGF(usage()), 0, INT_MAX);
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break;
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case 'd':
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base = 10;
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start = '0';
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break;
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default:
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usage();
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} ARGEND;
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if (*argv)
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file = *argv++;
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if (*argv)
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prefix = *argv++;
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if (*argv)
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usage();
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plen = strlen(prefix);
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if (plen+slen > NAME_MAX)
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eprintf("names cannot exceed %d bytes\n", NAME_MAX);
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strlcpy(name, prefix, sizeof(name));
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if (file && strcmp(file, "-") != 0) {
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in = fopen(file, "r");
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if (!in)
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eprintf("'%s':", file);
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}
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Nextfile:
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while ((out = nextfile(out, name, plen, slen))) {
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n = 0;
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while ((ch = getc(in)) != EOF) {
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putc(ch, out);
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n += (always || ch == '\n');
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if (n >= size)
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goto Nextfile;
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}
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fclose(out);
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break;
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}
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return 0;
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}
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int
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itostr(char *str, int x, int n)
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{
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@ -125,17 +26,110 @@ itostr(char *str, int x, int n)
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FILE *
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nextfile(FILE *f, char *buf, int plen, int slen)
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{
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static int n = 0;
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int s;
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static int filecount = 0;
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if (f)
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fclose(f);
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s = itostr(buf+plen, n++, slen);
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if (s < 0)
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if (itostr(buf + plen, filecount++, slen) < 0)
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return NULL;
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f = fopen(buf, "w");
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if (!f)
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if (!(f = fopen(buf, "w")))
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eprintf("'%s':", buf);
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return f;
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}
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static void
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usage(void)
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{
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eprintf("usage: %s [-a len] [-b bytes[k|m|g]] [-d] [-l lines] "
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"[input [prefix]]\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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FILE *in = stdin, *out = NULL;
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char name[NAME_MAX + 1];
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char *prefix = "x";
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char *file = NULL;
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char *tmp, *end;
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size_t size = 1000, scale = 1, n;
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int ch, plen, slen = 2, always = 0;
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long l;
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ARGBEGIN {
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case 'a':
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slen = estrtonum(EARGF(usage()), 0, INT_MAX);
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break;
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case 'b':
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always = 1;
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tmp = EARGF(usage());
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l = strtol(tmp, &end, 10);
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if (l <= 0)
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eprintf("invalid number of bytes: %s\n", tmp);
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size = (size_t)l;
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if (!*end)
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break;
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switch (toupper((int)*end)) {
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case 'K':
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scale = 1024;
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break;
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case 'M':
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scale = 1024L * 1024L;
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break;
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case 'G':
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scale = 1024L * 1024L * 1024L;
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break;
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default:
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usage();
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}
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if (size > (SIZE_MAX / scale))
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eprintf("'%s': out of range\n", tmp);
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size *= scale;
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break;
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case 'd':
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base = 10;
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start = '0';
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break;
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case 'l':
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always = 0;
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tmp = EARGF(usage());
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size = estrtonum(tmp, 1, MIN(LLONG_MAX, SIZE_MAX));
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break;
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default:
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usage();
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} ARGEND;
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if (*argv)
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file = *argv++;
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if (*argv)
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prefix = *argv++;
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if (*argv)
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usage();
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plen = strlen(prefix);
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if (plen + slen > NAME_MAX)
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eprintf("names cannot exceed %d bytes\n", NAME_MAX);
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strlcpy(name, prefix, sizeof(name));
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if (file && strcmp(file, "-") != 0) {
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if (!(in = fopen(file, "r")))
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eprintf("'%s':", file);
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}
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n = 0;
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while ((ch = getc(in)) != EOF) {
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if (!out || n >= size) {
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if (!(out = nextfile(out, name, plen, slen)))
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eprintf("fopen: %s:", name);
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n = 0;
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}
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n += (always || ch == '\n');
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putc(ch, out);
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}
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if (in != stdin)
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fclose(in);
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if (out)
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fclose(out);
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return 0;
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}
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