44 lines
1012 B
C
44 lines
1012 B
C
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#define TMPDIR "/tmp/"
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// When invoked, this application writes its input, parameters and
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// environment variables in differents files: last-(input|parameters|env) in TMPDIR.
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//
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// Useful for debugging purposes.
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int main(int argc, char **argv, char **env) {
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int fd = open(TMPDIR "last-input", O_APPEND | O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
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if (fd < 0) { return -1; }
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size_t nb = 0;
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char buffer[BUFSIZ];
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while((nb = read(0, buffer, BUFSIZ-1))) {
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dprintf(fd, "%*s", (int)nb, buffer);
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}
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close(fd);
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fd = open(TMPDIR "last-parameters", O_APPEND | O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
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if (fd < 0) { return -1; }
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for (size_t i = 0 ; i < argc ; i++) {
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dprintf(fd, "%s\n", argv[i]);
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}
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close(fd);
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fd = open(TMPDIR "last-env", O_APPEND | O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
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if (fd < 0) { return -1; }
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while (env[0] != NULL) {
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dprintf(fd, "%s\n", env[0]);
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printf("env: %s\n", env[0]);
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env++;
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}
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close(fd);
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return 0;
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}
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