#include <sys/types.h>
#include <sys/stat.h>
-#include <sys/mman.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
-#include <limits.h>
#include <ctype.h>
-#include <arpa/inet.h>
-
-int insert_extra_deps;
-char *target;
-char *depfile;
-char *cmdline;
static void usage(void)
{
exit(1);
}
-/*
- * Print out the commandline prefixed with cmd_<target filename> :=
- */
-static void print_cmdline(void)
-{
- printf("cmd_%s := %s\n\n", target, cmdline);
-}
-
/*
* Print out a dependency path from a symbol name
*/
static void do_extra_deps(void)
{
- if (insert_extra_deps) {
- char buf[80];
- while(fgets(buf, sizeof(buf), stdin)) {
- int len = strlen(buf);
- if (len < 2 || buf[len-1] != '\n') {
- fprintf(stderr, "fixdep: bad data on stdin\n");
- exit(1);
- }
- print_config(buf, len-1);
+ char buf[80];
+
+ while (fgets(buf, sizeof(buf), stdin)) {
+ int len = strlen(buf);
+
+ if (len < 2 || buf[len - 1] != '\n') {
+ fprintf(stderr, "fixdep: bad data on stdin\n");
+ exit(1);
}
+ print_config(buf, len - 1);
}
}
print_config(m, slen);
}
+/* test if s ends in sub */
+static int str_ends_with(const char *s, int slen, const char *sub)
+{
+ int sublen = strlen(sub);
+
+ if (sublen > slen)
+ return 0;
+
+ return !memcmp(s + slen - sublen, sub, sublen);
+}
+
static void parse_config_file(const char *p)
{
const char *q, *r;
q = p;
while (*q && (isalnum(*q) || *q == '_'))
q++;
- if (memcmp(q - 7, "_MODULE", 7) == 0)
+ if (str_ends_with(p, q - p, "_MODULE"))
r = q - 7;
else
r = q;
}
}
-/* test if s ends in sub */
-static int strrcmp(const char *s, const char *sub)
-{
- int slen = strlen(s);
- int sublen = strlen(sub);
-
- if (sublen > slen)
- return 1;
-
- return memcmp(s + slen - sublen, sub, sublen);
-}
-
-static void do_config_file(const char *filename)
+static void *read_file(const char *filename)
{
struct stat st;
int fd;
- char *map;
+ char *buf;
fd = open(filename, O_RDONLY);
if (fd < 0) {
- fprintf(stderr, "fixdep: error opening config file: ");
+ fprintf(stderr, "fixdep: error opening file: ");
perror(filename);
exit(2);
}
if (fstat(fd, &st) < 0) {
- fprintf(stderr, "fixdep: error fstat'ing config file: ");
+ fprintf(stderr, "fixdep: error fstat'ing file: ");
perror(filename);
exit(2);
}
- if (st.st_size == 0) {
- close(fd);
- return;
- }
- map = malloc(st.st_size + 1);
- if (!map) {
+ buf = malloc(st.st_size + 1);
+ if (!buf) {
perror("fixdep: malloc");
- close(fd);
- return;
+ exit(2);
}
- if (read(fd, map, st.st_size) != st.st_size) {
+ if (read(fd, buf, st.st_size) != st.st_size) {
perror("fixdep: read");
- close(fd);
- return;
+ exit(2);
}
- map[st.st_size] = '\0';
+ buf[st.st_size] = '\0';
close(fd);
- parse_config_file(map);
+ return buf;
+}
- free(map);
+/* Ignore certain dependencies */
+static int is_ignored_file(const char *s, int len)
+{
+ return str_ends_with(s, len, "include/generated/autoconf.h") ||
+ str_ends_with(s, len, "include/generated/autoksyms.h") ||
+ str_ends_with(s, len, "arch/um/include/uml-config.h") ||
+ str_ends_with(s, len, "include/linux/kconfig.h") ||
+ str_ends_with(s, len, ".ver");
}
/*
* assignments are parsed not only by make, but also by the rather simple
* parser in scripts/mod/sumversion.c.
*/
-static void parse_dep_file(void *map, size_t len)
+static void parse_dep_file(char *m, const char *target, int insert_extra_deps)
{
- char *m = map;
- char *end = m + len;
char *p;
- char s[PATH_MAX];
- int is_target;
+ int is_last, is_target;
int saw_any_target = 0;
int is_first_dep = 0;
+ void *buf;
- while (m < end) {
+ while (1) {
/* Skip any "white space" */
- while (m < end && (*m == ' ' || *m == '\\' || *m == '\n'))
+ while (*m == ' ' || *m == '\\' || *m == '\n')
m++;
+
+ if (!*m)
+ break;
+
/* Find next "white space" */
p = m;
- while (p < end && *p != ' ' && *p != '\\' && *p != '\n')
+ while (*p && *p != ' ' && *p != '\\' && *p != '\n')
p++;
+ is_last = (*p == '\0');
/* Is the token we found a target name? */
is_target = (*(p-1) == ':');
/* Don't write any target names into the dependency file */
if (is_target) {
/* The /next/ file is the first dependency */
is_first_dep = 1;
- } else {
- /* Save this token/filename */
- memcpy(s, m, p-m);
- s[p - m] = 0;
-
- /* Ignore certain dependencies */
- if (strrcmp(s, "include/generated/autoconf.h") &&
- strrcmp(s, "include/generated/autoksyms.h") &&
- strrcmp(s, "arch/um/include/uml-config.h") &&
- strrcmp(s, "include/linux/kconfig.h") &&
- strrcmp(s, ".ver")) {
+ } else if (!is_ignored_file(m, p - m)) {
+ *p = '\0';
+
+ /*
+ * Do not list the source file as dependency, so that
+ * kbuild is not confused if a .c file is rewritten
+ * into .S or vice versa. Storing it in source_* is
+ * needed for modpost to compute srcversions.
+ */
+ if (is_first_dep) {
/*
- * Do not list the source file as dependency,
- * so that kbuild is not confused if a .c file
- * is rewritten into .S or vice versa. Storing
- * it in source_* is needed for modpost to
- * compute srcversions.
+ * If processing the concatenation of multiple
+ * dependency files, only process the first
+ * target name, which will be the original
+ * source name, and ignore any other target
+ * names, which will be intermediate temporary
+ * files.
*/
- if (is_first_dep) {
- /*
- * If processing the concatenation of
- * multiple dependency files, only
- * process the first target name, which
- * will be the original source name,
- * and ignore any other target names,
- * which will be intermediate temporary
- * files.
- */
- if (!saw_any_target) {
- saw_any_target = 1;
- printf("source_%s := %s\n\n",
- target, s);
- printf("deps_%s := \\\n",
- target);
- }
- is_first_dep = 0;
- } else
- printf(" %s \\\n", s);
- do_config_file(s);
+ if (!saw_any_target) {
+ saw_any_target = 1;
+ printf("source_%s := %s\n\n",
+ target, m);
+ printf("deps_%s := \\\n", target);
+ }
+ is_first_dep = 0;
+ } else {
+ printf(" %s \\\n", m);
}
+
+ buf = read_file(m);
+ parse_config_file(buf);
+ free(buf);
}
+
+ if (is_last)
+ break;
+
/*
* Start searching for next token immediately after the first
* "whitespace" character that follows this token.
exit(1);
}
- do_extra_deps();
+ if (insert_extra_deps)
+ do_extra_deps();
printf("\n%s: $(deps_%s)\n\n", target, target);
printf("$(deps_%s):\n", target);
}
-static void print_deps(void)
-{
- struct stat st;
- int fd;
- void *map;
-
- fd = open(depfile, O_RDONLY);
- if (fd < 0) {
- fprintf(stderr, "fixdep: error opening depfile: ");
- perror(depfile);
- exit(2);
- }
- if (fstat(fd, &st) < 0) {
- fprintf(stderr, "fixdep: error fstat'ing depfile: ");
- perror(depfile);
- exit(2);
- }
- if (st.st_size == 0) {
- fprintf(stderr,"fixdep: %s is empty\n",depfile);
- close(fd);
- return;
- }
- map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
- if ((long) map == -1) {
- perror("fixdep: mmap");
- close(fd);
- return;
- }
-
- parse_dep_file(map, st.st_size);
-
- munmap(map, st.st_size);
-
- close(fd);
-}
-
int main(int argc, char *argv[])
{
+ const char *depfile, *target, *cmdline;
+ int insert_extra_deps = 0;
+ void *buf;
+
if (argc == 5 && !strcmp(argv[1], "-e")) {
insert_extra_deps = 1;
argv++;
target = argv[2];
cmdline = argv[3];
- print_cmdline();
- print_deps();
+ printf("cmd_%s := %s\n\n", target, cmdline);
+
+ buf = read_file(depfile);
+ parse_dep_file(buf, target, insert_extra_deps);
+ free(buf);
return 0;
}
projects / linux.git / commitdiff