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/* rpmsort: sort(1), but for RPM versions */
#include <popt.h>
#include <string.h>
#include <rpm/rpmlib.h>
#include "debug.h"
#include "system.h"
#define BUFSIZE 2048
static size_t read_file(const char *input, char **ret)
{
FILE *in;
size_t s, sz = BUFSIZE, offset = 0;
char *text;
if (!strcmp(input, "-"))
in = stdin;
else
in = fopen(input, "r");
text = xmalloc(sz);
if (!in) {
fprintf(stderr, "cannot open `%s'", input);
exit(EXIT_FAILURE);
}
while ((s = fread(text + offset, 1, sz - offset, in)) != 0) {
offset += s;
if (sz - offset == 0) {
sz += BUFSIZE;
text = xrealloc(text, sz);
}
}
text[offset] = '\0';
*ret = text;
if (in != stdin)
fclose(in);
return offset + 1;
}
/* Returns name, version, and release, which will be NULL string pointers
* returned if nothing was found. */
static void split_package_string(char *package_string, char **name,
char **version, char **release)
{
char *package_version, *package_release;
/* Release */
package_release = strrchr(package_string, '-');
if (package_release != NULL)
*package_release++ = '\0';
*release = package_release;
/* Version */
package_version = strrchr(package_string, '-');
if (package_version != NULL)
*package_version++ = '\0';
*version = package_version;
/* Name */
*name = package_string;
/* Bubble up non-null values from release to name */
if (*name == NULL) {
*name = (*version == NULL ? *release : *version);
*version = *release;
*release = NULL;
}
if (*version == NULL) {
*version = *release;
*release = NULL;
}
}
/* A package name-version-release comparator for qsort. It expects p, q which
* are pointers to character strings and will not be altered in this
* function. */
static int package_version_compare(const void *p, const void *q)
{
char *local_p, *local_q;
char *lhs_name, *lhs_version, *lhs_release;
char *rhs_name, *rhs_version, *rhs_release;
int vercmpflag = 0;
local_p = rstrdup(*(char * const *)p);
local_q = rstrdup(*(char * const *)q);
split_package_string(local_p, &lhs_name, &lhs_version, &lhs_release);
split_package_string(local_q, &rhs_name, &rhs_version, &rhs_release);
/* Check Name and return if unequal */
vercmpflag = strcmp((lhs_name == NULL ? "" : lhs_name),
(rhs_name == NULL ? "" : rhs_name));
if (vercmpflag != 0)
goto exit;
/* Check version and return if unequal */
vercmpflag = rpmvercmp((lhs_version == NULL ? "" : lhs_version),
(rhs_version == NULL ? "" : rhs_version));
if (vercmpflag != 0)
goto exit;
/* Check release and return the version compare value */
vercmpflag = rpmvercmp((lhs_release == NULL ? "" : lhs_release),
(rhs_release == NULL ? "" : rhs_release));
exit:
rfree(local_p);
rfree(local_q);
return vercmpflag;
}
static void add_input(const char *filename, char ***package_names,
size_t *n_package_names)
{
char *orig_input_buffer = NULL;
char *input_buffer;
char *position_of_newline;
char **names = *package_names;
char **new_names = NULL;
size_t n_names = *n_package_names;
if (!*package_names)
new_names = names = xmalloc(sizeof(char *) * 2);
if (read_file(filename, &orig_input_buffer) < 2) {
if (new_names)
free(new_names);
if (orig_input_buffer)
free(orig_input_buffer);
return;
}
input_buffer = orig_input_buffer;
while (input_buffer && *input_buffer &&
(position_of_newline = strchrnul(input_buffer, '\n'))) {
size_t sz = position_of_newline - input_buffer;
char *new;
if (sz == 0) {
input_buffer = position_of_newline + 1;
continue;
}
new = rstrndup(input_buffer, sz);
names = xrealloc(names, sizeof(char *) * (n_names + 1));
names[n_names] = new;
n_names++;
/* Move buffer ahead to next line. */
input_buffer = position_of_newline + 1;
if (*position_of_newline == '\0')
input_buffer = NULL;
}
free(orig_input_buffer);
*package_names = names;
*n_package_names = n_names;
}
static struct poptOption optionsTable[] = { POPT_AUTOHELP POPT_TABLEEND };
int main(int argc, const char *argv[])
{
poptContext optCon;
const char *arg;
char **package_names = NULL;
size_t n_package_names = 0;
char seen_file = 0;
optCon = poptGetContext(NULL, argc, argv, optionsTable, 0);
poptSetOtherOptionHelp(optCon, "<FILES>");
if (poptGetNextOpt(optCon) == 0) {
poptPrintUsage(optCon, stderr, 0);
exit(EXIT_FAILURE);
}
while ((arg = poptGetArg(optCon)) != NULL) {
add_input(arg, &package_names, &n_package_names);
seen_file = 1;
}
/* If there's no inputs in argv, add one for stdin. */
if (!seen_file)
add_input("-", &package_names, &n_package_names);
if (package_names == NULL || n_package_names < 1) {
fprintf(stderr, "Invalid input\n");
exit(EXIT_FAILURE);
}
qsort(package_names, n_package_names, sizeof(char *),
package_version_compare);
/* Send sorted list to stdout. */
for (int i = 0; i < n_package_names; i++) {
fprintf(stdout, "%s\n", package_names[i]);
free(package_names[i]);
}
free(package_names);
poptFreeContext(optCon);
return 0;
}
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