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#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if HAVE_ALLOCA_H
# include <alloca.h>
#endif
#include "popt.h"
#include "poptint.h"
static void configLine(poptContext con, char * line) {
int nameLength = strlen(con->appName);
char * opt;
struct poptAlias alias;
char * entryType;
char * longName = NULL;
char shortName = '\0';
if (strncmp(line, con->appName, nameLength)) return;
line += nameLength;
if (!*line || !isspace(*line)) return;
while (*line && isspace(*line)) line++;
entryType = line;
while (!*line || !isspace(*line)) line++;
*line++ = '\0';
while (*line && isspace(*line)) line++;
if (!*line) return;
opt = line;
while (!*line || !isspace(*line)) line++;
*line++ = '\0';
while (*line && isspace(*line)) line++;
if (!*line) return;
if (opt[0] == '-' && opt[1] == '-')
longName = opt + 2;
else if (opt[0] == '-' && !opt[2])
shortName = opt[1];
if (!strcmp(entryType, "alias")) {
if (poptParseArgvString(line, &alias.argc, &alias.argv)) return;
alias.longName = longName, alias.shortName = shortName;
poptAddAlias(con, alias, 0);
} else if (!strcmp(entryType, "exec")) {
con->execs = realloc(con->execs,
sizeof(*con->execs) * (con->numExecs + 1));
if (longName)
con->execs[con->numExecs].longName = strdup(longName);
else
con->execs[con->numExecs].longName = NULL;
con->execs[con->numExecs].shortName = shortName;
con->execs[con->numExecs].script = strdup(line);
con->numExecs++;
}
}
int poptReadConfigFile(poptContext con, char * fn) {
char * file, * chptr, * end;
char * buf, * dst;
int fd, rc;
int fileLength;
fd = open(fn, O_RDONLY);
if (fd < 0) {
if (errno == ENOENT)
return 0;
else
return POPT_ERROR_ERRNO;
}
fileLength = lseek(fd, 0, SEEK_END);
lseek(fd, 0, 0);
file = alloca(fileLength + 1);
if ((fd = read(fd, file, fileLength)) != fileLength) {
rc = errno;
close(fd);
errno = rc;
return POPT_ERROR_ERRNO;
}
close(fd);
dst = buf = alloca(fileLength + 1);
chptr = file;
end = (file + fileLength);
while (chptr < end) {
switch (*chptr) {
case '\n':
*dst = '\0';
dst = buf;
while (*dst && isspace(*dst)) dst++;
if (*dst && *dst != '#') {
configLine(con, dst);
}
chptr++;
break;
case '\\':
*dst++ = *chptr++;
if (chptr < end) {
if (*chptr == '\n')
dst--, chptr++;
/* \ at the end of a line does not insert a \n */
else
*dst++ = *chptr++;
}
break;
default:
*dst++ = *chptr++;
}
}
return 0;
}
int poptReadDefaultConfig(poptContext con, int useEnv) {
char * fn, * home;
int rc;
if (!con->appName) return 0;
rc = poptReadConfigFile(con, "/etc/popt");
if (rc) return rc;
if (getuid() != geteuid()) return 0;
if ((home = getenv("HOME"))) {
fn = alloca(strlen(home) + 20);
strcpy(fn, home);
strcat(fn, "/.popt");
rc = poptReadConfigFile(con, fn);
if (rc) return rc;
}
return 0;
}
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