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/*
* This program reads a list of pathnames from standard input,
* and prints out a list of those pathnames that are either
* regular files or symbolic links.
*
* If a line begins with "# ", the rest of the line is taken
* to be a name of an output file. All output will then go to
* that file, until another "# " line is found, at which point
* the previous file is closed and a new file is opened for output.
* Empty output files are removed.
*/
#include <stdio.h>
#include <stdlib.h>
#include <err.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#define FILENAME_LEN 4096
int
main(int argc, char *argv[])
{
char file_name[FILENAME_LEN];
char pkg_name[FILENAME_LEN];
struct stat stb;
FILE *fout = stdout;
int nfiles = 0;
pkg_name[0] = '\0';
while (fgets(file_name, sizeof(file_name), stdin) != NULL) {
/* Zap the trailing newline */
file_name[strlen(file_name)-1] = '\0';
/* Check for package name */
if (file_name[0] == '#' && file_name[1] == ' ') {
if (fout != stdout) {
fclose(fout);
/* Remove empty files */
if (pkg_name[0] && nfiles == 0)
(void)unlink(pkg_name);
}
strncpy(pkg_name, &file_name[2], FILENAME_LEN);
fout = fopen(pkg_name, "w");
if (fout == NULL) {
warn("%s", pkg_name);
pkg_name[0] = '\0';
}
nfiles = 0;
continue;
}
if (stat(file_name, &stb) == 0 &&
(S_ISREG(stb.st_mode) || S_ISLNK(stb.st_mode))) {
fprintf(fout, "%s\n", file_name);
nfiles++;
}
}
if (fout != stdout)
fclose(fout);
exit (0);
}
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