mirror of https://github.com/pygos/pkg-utils.git
102 lines
1.4 KiB
C
102 lines
1.4 KiB
C
#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include "util.h"
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int canonicalize_name(char *filename)
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{
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char *ptr = filename;
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int i;
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while (*ptr == '/')
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++ptr;
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if (ptr != filename) {
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memmove(filename, ptr, strlen(ptr) + 1);
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ptr = filename;
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}
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while (*ptr != '\0') {
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if (*ptr == '/') {
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for (i = 0; ptr[i] == '/'; ++i)
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;
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if (i > 1)
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memmove(ptr + 1, ptr + i, strlen(ptr + i) + 1);
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}
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if (ptr[0] == '/' && ptr[1] == '\0') {
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*ptr = '\0';
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break;
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}
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++ptr;
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}
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ptr = filename;
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while (*ptr != '\0') {
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if (ptr[0] == '.') {
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if (ptr[1] == '/' || ptr[1] == '\0')
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return -1;
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if (ptr[1] == '.' &&
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(ptr[2] == '/' || ptr[2] == '\0')) {
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return -1;
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}
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}
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while (*ptr != '\0' && *ptr != '/')
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++ptr;
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if (*ptr == '/')
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++ptr;
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}
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return 0;
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}
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ssize_t write_retry(int fd, void *data, size_t size)
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{
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ssize_t ret, total = 0;
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while (size > 0) {
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ret = write(fd, data, size);
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if (ret == 0)
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break;
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if (ret < 0) {
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if (errno == EINTR)
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continue;
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return -1;
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}
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data = (char *)data + ret;
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size -= ret;
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total += ret;
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}
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return total;
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}
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ssize_t read_retry(int fd, void *buffer, size_t size)
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{
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ssize_t ret, total = 0;
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while (size > 0) {
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ret = read(fd, buffer, size);
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if (ret < 0) {
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if (errno == EINTR)
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continue;
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return -1;
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}
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if (ret == 0)
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break;
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total += ret;
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size -= ret;
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buffer = (char *)buffer + ret;
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}
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return total;
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}
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